feat: Added better md styling

backend/.env.example

@@ -26,3 +26,9 @@ CORS_ALLOWED_ORIGINS=http://localhost:5173,http://localhost:3000
 # Rate Limiting
 RATE_LIMIT_REQUESTS=50
 RATE_LIMIT_WINDOW=1s
+
+# Redis Sessions
+REDIS_ADDR=localhost:6379
+REDIS_PASSWORD=
+REDIS_DB=0
+SESSION_TTL_HOURS=168

backend/cmd/server/main.go

@@ -6,6 +6,7 @@ import (
 	"log"
 	"net/http"
 	"os"
+	"strconv"
 	"strings"
 	"time"
 
@@ -19,6 +20,7 @@ import (
 	"github.com/noteapp/backend/internal/infrastructure/security"
 	"github.com/noteapp/backend/internal/interfaces/handlers"
 	"github.com/noteapp/backend/internal/interfaces/middleware"
+	"github.com/redis/go-redis/v9"
 	"go.mongodb.org/mongo-driver/v2/bson"
 )
 
@@ -47,6 +49,31 @@ func main() {
 		port = "8080"
 	}
 
+	redisAddr := os.Getenv("REDIS_ADDR")
+	if redisAddr == "" {
+		redisAddr = "localhost:6379"
+	}
+
+	redisUser := os.Getenv("REDIS_USER")
+	redisPassword := os.Getenv("REDIS_PASSWORD")
+	redisDB := 0
+	if redisDBText := os.Getenv("REDIS_DB"); redisDBText != "" {
+		parsedDB, err := strconv.Atoi(redisDBText)
+		if err != nil {
+			log.Fatalf("invalid REDIS_DB value: %v", err)
+		}
+		redisDB = parsedDB
+	}
+
+	sessionTTL := 7 * 24 * time.Hour
+	if sessionTTLText := os.Getenv("SESSION_TTL_HOURS"); sessionTTLText != "" {
+		hours, err := strconv.Atoi(sessionTTLText)
+		if err != nil || hours <= 0 {
+			log.Fatalf("invalid SESSION_TTL_HOURS value: %q", sessionTTLText)
+		}
+		sessionTTL = time.Duration(hours) * time.Hour
+	}
+
 	// Connect to database
 	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
 	defer cancel()
@@ -57,6 +84,20 @@ func main() {
 	}
 	defer db.Close(context.Background())
 
+	redisClient := redis.NewClient(&redis.Options{
+		Addr:     redisAddr,
+		Username: redisUser,
+		Password: redisPassword,
+		DB:       redisDB,
+	})
+
+	if err := redisClient.Ping(context.Background()).Err(); err != nil {
+		log.Fatalf("failed to connect to redis: %v", err)
+	}
+	defer func() {
+		_ = redisClient.Close()
+	}()
+
 	// Initialize security components
 	passwordHasher := security.NewPasswordHasher()
 	encryptor, err := security.NewEncryptor(encryptionKey)
@@ -66,6 +107,7 @@ func main() {
 
 	// Initialize JWT manager
 	jwtManager := auth.NewJWTManager(jwtSecret, "noteapp", 1*time.Hour)
+	sessionManager := auth.NewSessionManager(redisClient, sessionTTL)
 
 	// Initialize services
 	permissionService := services.NewPermissionService(
@@ -117,6 +159,8 @@ func main() {
 	adminService := services.NewAdminService(
 		db.UserRepo,
 		db.GroupRepo,
+		db.ProviderRepo,
+		db.LinkRepo,
 		db.SpaceRepo,
 		db.MembershipRepo,
 		db.NoteRepo,
@@ -141,7 +185,7 @@ func main() {
 	}
 
 	// Initialize handlers
-	authHandler := handlers.NewAuthHandler(authService)
+	authHandler := handlers.NewAuthHandler(authService, sessionManager)
 	spaceHandler := handlers.NewSpaceHandler(spaceService)
 	noteHandler := handlers.NewNoteHandler(noteService)
 	categoryHandler := handlers.NewCategoryHandler(categoryService)
@@ -158,7 +202,7 @@ func main() {
 	})
 
 	// Middleware
-	authMiddleware := middleware.NewAuthMiddleware(jwtManager)
+	authMiddleware := middleware.NewAuthMiddleware(jwtManager, sessionManager)
 	router.Use(middleware.LoggingMiddleware)
 	router.Use(middleware.CORSMiddleware)
 	router.Use(middleware.SecurityHeaders)
@@ -185,6 +229,7 @@ func main() {
 	// Protected endpoints
 	api := router.PathPrefix("/api/v1").Subrouter()
 	api.Use(authMiddleware.Middleware)
+	api.HandleFunc("/auth/me", authHandler.Me).Methods("GET")
 
 	// Space endpoints
 	api.HandleFunc("/spaces", spaceHandler.GetUserSpaces).Methods("GET")
@@ -255,10 +300,12 @@ func main() {
 		})
 	})
 	admin.HandleFunc("/users", adminHandler.ListUsers).Methods("GET")
+	admin.HandleFunc("/users/{userId}", adminHandler.DeleteUser).Methods("DELETE")
 	admin.HandleFunc("/users/{userId}/groups", adminHandler.UpdateUserGroups).Methods("PUT")
 	admin.HandleFunc("/groups", adminHandler.ListGroups).Methods("GET")
 	admin.HandleFunc("/groups", adminHandler.CreateGroup).Methods("POST")
 	admin.HandleFunc("/groups/{groupId}", adminHandler.UpdateGroup).Methods("PUT")
+	admin.HandleFunc("/groups/{groupId}", adminHandler.DeleteGroup).Methods("DELETE")
 	admin.HandleFunc("/spaces", adminHandler.ListAllSpaces).Methods("GET")
 	admin.HandleFunc("/spaces/{spaceId}", adminHandler.UpdateSpace).Methods("PUT")
 	admin.HandleFunc("/spaces/{spaceId}", adminHandler.DeleteSpace).Methods("DELETE")
@@ -270,6 +317,8 @@ func main() {
 	admin.HandleFunc("/feature-flags", adminHandler.UpdateFeatureFlags).Methods("PUT")
 	// manage identity providers — admin-only
 	admin.HandleFunc("/auth/providers", authHandler.CreateProvider).Methods("POST")
+	admin.HandleFunc("/auth/providers/{providerId}", authHandler.UpdateProvider).Methods("PUT")
+	admin.HandleFunc("/auth/providers/{providerId}", adminHandler.DeleteProvider).Methods("DELETE")
 
 	// Serve static files (frontend) for all other routes
 	// This must be after all API route handlers to allow API routes to take precedence

backend/go.mod

@@ -3,18 +3,20 @@ module github.com/noteapp/backend
 go 1.25.0
 
 require (
+	github.com/aws/aws-sdk-go-v2 v1.41.4
+	github.com/aws/aws-sdk-go-v2/credentials v1.19.12
+	github.com/aws/aws-sdk-go-v2/service/s3 v1.97.2
 	github.com/golang-jwt/jwt/v5 v5.2.0
 	github.com/gorilla/mux v1.8.1
 	github.com/joho/godotenv v1.5.1
+	github.com/redis/go-redis/v9 v9.18.0
 	go.mongodb.org/mongo-driver/v2 v2.5.0
 	golang.org/x/crypto v0.49.0
 	golang.org/x/oauth2 v0.30.0
 )
 
 require (
-	github.com/aws/aws-sdk-go-v2 v1.41.4 // indirect
 	github.com/aws/aws-sdk-go-v2/aws/protocol/eventstream v1.7.8 // indirect
-	github.com/aws/aws-sdk-go-v2/credentials v1.19.12 // indirect
 	github.com/aws/aws-sdk-go-v2/internal/configsources v1.4.20 // indirect
 	github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.7.20 // indirect
 	github.com/aws/aws-sdk-go-v2/internal/v4a v1.4.21 // indirect
@@ -22,13 +24,15 @@ require (
 	github.com/aws/aws-sdk-go-v2/service/internal/checksum v1.9.12 // indirect
 	github.com/aws/aws-sdk-go-v2/service/internal/presigned-url v1.13.20 // indirect
 	github.com/aws/aws-sdk-go-v2/service/internal/s3shared v1.19.20 // indirect
-	github.com/aws/aws-sdk-go-v2/service/s3 v1.97.2 // indirect
 	github.com/aws/smithy-go v1.24.2 // indirect
+	github.com/cespare/xxhash/v2 v2.3.0 // indirect
+	github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f // indirect
 	github.com/klauspost/compress v1.17.6 // indirect
 	github.com/xdg-go/pbkdf2 v1.0.0 // indirect
 	github.com/xdg-go/scram v1.2.0 // indirect
 	github.com/xdg-go/stringprep v1.0.4 // indirect
 	github.com/youmark/pkcs8 v0.0.0-20240726163527-a2c0da244d78 // indirect
+	go.uber.org/atomic v1.11.0 // indirect
 	golang.org/x/sync v0.20.0 // indirect
 	golang.org/x/sys v0.42.0 // indirect
 	golang.org/x/text v0.35.0 // indirect

backend/go.sum

@@ -22,8 +22,16 @@ github.com/aws/aws-sdk-go-v2/service/s3 v1.97.2 h1:MRNiP6nqa20aEl8fQ6PJpEq11b2d4
 github.com/aws/aws-sdk-go-v2/service/s3 v1.97.2/go.mod h1:FrNA56srbsr3WShiaelyWYEo70x80mXnVZ17ZZfbeqg=
 github.com/aws/smithy-go v1.24.2 h1:FzA3bu/nt/vDvmnkg+R8Xl46gmzEDam6mZ1hzmwXFng=
 github.com/aws/smithy-go v1.24.2/go.mod h1:YE2RhdIuDbA5E5bTdciG9KrW3+TiEONeUWCqxX9i1Fc=
+github.com/bsm/ginkgo/v2 v2.12.0 h1:Ny8MWAHyOepLGlLKYmXG4IEkioBysk6GpaRTLC8zwWs=
+github.com/bsm/ginkgo/v2 v2.12.0/go.mod h1:SwYbGRRDovPVboqFv0tPTcG1sN61LM1Z4ARdbAV9g4c=
+github.com/bsm/gomega v1.27.10 h1:yeMWxP2pV2fG3FgAODIY8EiRE3dy0aeFYt4l7wh6yKA=
+github.com/bsm/gomega v1.27.10/go.mod h1:JyEr/xRbxbtgWNi8tIEVPUYZ5Dzef52k01W3YH0H+O0=
+github.com/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UFvs=
+github.com/cespare/xxhash/v2 v2.3.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f h1:lO4WD4F/rVNCu3HqELle0jiPLLBs70cWOduZpkS1E78=
+github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f/go.mod h1:cuUVRXasLTGF7a8hSLbxyZXjz+1KgoB3wDUb6vlszIc=
 github.com/golang-jwt/jwt/v5 v5.2.0 h1:d/ix8ftRUorsN+5eMIlF4T6J8CAt9rch3My2winC1Jw=
 github.com/golang-jwt/jwt/v5 v5.2.0/go.mod h1:pqrtFR0X4osieyHYxtmOUWsAWrfe1Q5UVIyoH402zdk=
 github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
@@ -34,6 +42,14 @@ github.com/joho/godotenv v1.5.1 h1:7eLL/+HRGLY0ldzfGMeQkb7vMd0as4CfYvUVzLqw0N0=
 github.com/joho/godotenv v1.5.1/go.mod h1:f4LDr5Voq0i2e/R5DDNOoa2zzDfwtkZa6DnEwAbqwq4=
 github.com/klauspost/compress v1.17.6 h1:60eq2E/jlfwQXtvZEeBUYADs+BwKBWURIY+Gj2eRGjI=
 github.com/klauspost/compress v1.17.6/go.mod h1:/dCuZOvVtNoHsyb+cuJD3itjs3NbnF6KH9zAO4BDxPM=
+github.com/klauspost/cpuid/v2 v2.0.9 h1:lgaqFMSdTdQYdZ04uHyN2d/eKdOMyi2YLSvlQIBFYa4=
+github.com/klauspost/cpuid/v2 v2.0.9/go.mod h1:FInQzS24/EEf25PyTYn52gqo7WaD8xa0213Md/qVLRg=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/redis/go-redis/v9 v9.18.0 h1:pMkxYPkEbMPwRdenAzUNyFNrDgHx9U+DrBabWNfSRQs=
+github.com/redis/go-redis/v9 v9.18.0/go.mod h1:k3ufPphLU5YXwNTUcCRXGxUoF1fqxnhFQmscfkCoDA0=
+github.com/stretchr/testify v1.3.0 h1:TivCn/peBQ7UY8ooIcPgZFpTNSz0Q2U6UrFlUfqbe0Q=
+github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/xdg-go/pbkdf2 v1.0.0 h1:Su7DPu48wXMwC3bs7MCNG+z4FhcyEuz5dlvchbq0B0c=
 github.com/xdg-go/pbkdf2 v1.0.0/go.mod h1:jrpuAogTd400dnrH08LKmI/xc1MbPOebTwRqcT5RDeI=
 github.com/xdg-go/scram v1.2.0 h1:bYKF2AEwG5rqd1BumT4gAnvwU/M9nBp2pTSxeZw7Wvs=
@@ -43,8 +59,12 @@ github.com/xdg-go/stringprep v1.0.4/go.mod h1:mPGuuIYwz7CmR2bT9j4GbQqutWS1zV24gi
 github.com/youmark/pkcs8 v0.0.0-20240726163527-a2c0da244d78 h1:ilQV1hzziu+LLM3zUTJ0trRztfwgjqKnBWNtSRkbmwM=
 github.com/youmark/pkcs8 v0.0.0-20240726163527-a2c0da244d78/go.mod h1:aL8wCCfTfSfmXjznFBSZNN13rSJjlIOI1fUNAtF7rmI=
 github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
+github.com/zeebo/xxh3 v1.0.2 h1:xZmwmqxHZA8AI603jOQ0tMqmBr9lPeFwGg6d+xy9DC0=
+github.com/zeebo/xxh3 v1.0.2/go.mod h1:5NWz9Sef7zIDm2JHfFlcQvNekmcEl9ekUZQQKCYaDcA=
 go.mongodb.org/mongo-driver/v2 v2.5.0 h1:yXUhImUjjAInNcpTcAlPHiT7bIXhshCTL3jVBkF3xaE=
 go.mongodb.org/mongo-driver/v2 v2.5.0/go.mod h1:yOI9kBsufol30iFsl1slpdq1I0eHPzybRWdyYUs8K/0=
+go.uber.org/atomic v1.11.0 h1:ZvwS0R+56ePWxUNi+Atn9dWONBPp/AUETXlHW0DxSjE=
+go.uber.org/atomic v1.11.0/go.mod h1:LUxbIzbOniOlMKjJjyPfpl4v+PKK2cNJn91OQbhoJI0=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
 golang.org/x/crypto v0.49.0 h1:+Ng2ULVvLHnJ/ZFEq4KdcDd/cfjrrjjNSXNzxg0Y4U4=

backend/internal/application/dto/dto.go

@@ -57,6 +57,21 @@ type CreateAuthProviderRequest struct {
 	IsActive         bool     `json:"is_active"`
 }
 
+// UpdateAuthProviderRequest represents an OAuth/OIDC provider update request.
+// ClientSecret may be empty to keep the existing secret.
+type UpdateAuthProviderRequest struct {
+	Name             string   `json:"name"`
+	Type             string   `json:"type"`
+	ClientID         string   `json:"client_id"`
+	ClientSecret     string   `json:"client_secret"`
+	AuthorizationURL string   `json:"authorization_url"`
+	TokenURL         string   `json:"token_url"`
+	UserInfoURL      string   `json:"userinfo_url"`
+	Scopes           []string `json:"scopes"`
+	IDTokenClaim     string   `json:"id_token_claim,omitempty"`
+	IsActive         bool     `json:"is_active"`
+}
+
 // FeatureFlagsDTO represents app-wide feature flags in API responses.
 type FeatureFlagsDTO struct {
 	RegistrationEnabled  bool   `json:"registration_enabled"`

backend/internal/application/services/admin_service.go

@@ -17,6 +17,8 @@ import (
 type AdminService struct {
 	userRepo          repositories.UserRepository
 	groupRepo         repositories.GroupRepository
+	providerRepo      repositories.AuthProviderRepository
+	linkRepo          repositories.UserProviderLinkRepository
 	spaceRepo         repositories.SpaceRepository
 	membershipRepo    repositories.MembershipRepository
 	noteRepo          repositories.NoteRepository
@@ -30,6 +32,8 @@ type AdminService struct {
 func NewAdminService(
 	userRepo repositories.UserRepository,
 	groupRepo repositories.GroupRepository,
+	providerRepo repositories.AuthProviderRepository,
+	linkRepo repositories.UserProviderLinkRepository,
 	spaceRepo repositories.SpaceRepository,
 	membershipRepo repositories.MembershipRepository,
 	noteRepo repositories.NoteRepository,
@@ -41,6 +45,8 @@ func NewAdminService(
 	return &AdminService{
 		userRepo:          userRepo,
 		groupRepo:         groupRepo,
+		providerRepo:      providerRepo,
+		linkRepo:          linkRepo,
 		spaceRepo:         spaceRepo,
 		membershipRepo:    membershipRepo,
 		noteRepo:          noteRepo,
@@ -51,6 +57,114 @@ func NewAdminService(
 	}
 }
 
+// DeleteUser deletes a user and related memberships/provider links.
+func (s *AdminService) DeleteUser(ctx context.Context, currentUserID, targetUserID bson.ObjectID) error {
+	if currentUserID == targetUserID {
+		return errors.New("you cannot delete your own account")
+	}
+
+	spaces, err := s.spaceRepo.GetAllSpaces(ctx)
+	if err != nil {
+		return err
+	}
+	for _, space := range spaces {
+		if space.OwnerID == targetUserID {
+			return errors.New("cannot delete user that owns spaces; transfer or delete spaces first")
+		}
+	}
+
+	memberships, err := s.membershipRepo.GetUserMemberships(ctx, targetUserID)
+	if err == nil {
+		for _, membership := range memberships {
+			if err := s.membershipRepo.DeleteMembership(ctx, membership.ID); err != nil {
+				return err
+			}
+		}
+	}
+
+	if s.linkRepo != nil {
+		links, err := s.linkRepo.GetUserLinks(ctx, targetUserID)
+		if err == nil {
+			for _, link := range links {
+				if err := s.linkRepo.DeleteLink(ctx, link.ID); err != nil {
+					return err
+				}
+			}
+		}
+	}
+
+	return s.userRepo.DeleteUser(ctx, targetUserID)
+}
+
+// DeleteGroup deletes a non-system group and removes it from users.
+func (s *AdminService) DeleteGroup(ctx context.Context, groupID bson.ObjectID) error {
+	group, err := s.groupRepo.GetGroupByID(ctx, groupID)
+	if err != nil {
+		return err
+	}
+	if group.IsSystem {
+		return errors.New("system groups cannot be deleted")
+	}
+
+	users, err := s.userRepo.ListAllUsers(ctx)
+	if err != nil {
+		return err
+	}
+	for _, user := range users {
+		filtered := make([]bson.ObjectID, 0, len(user.GroupIDs))
+		changed := false
+		for _, assignedGroupID := range user.GroupIDs {
+			if assignedGroupID == groupID {
+				changed = true
+				continue
+			}
+			filtered = append(filtered, assignedGroupID)
+		}
+		if !changed {
+			continue
+		}
+		user.GroupIDs = filtered
+		if err := s.userRepo.UpdateUser(ctx, user); err != nil {
+			return err
+		}
+	}
+
+	if err := s.groupRepo.DeleteGroup(ctx, groupID); err != nil {
+		return err
+	}
+
+	return s.refreshAllUserPermissions(ctx)
+}
+
+// DeleteProvider deletes an auth provider and all user-provider links connected to it.
+func (s *AdminService) DeleteProvider(ctx context.Context, providerID bson.ObjectID) error {
+	if s.providerRepo == nil {
+		return errors.New("provider repository unavailable")
+	}
+
+	if s.linkRepo != nil {
+		users, err := s.userRepo.ListAllUsers(ctx)
+		if err != nil {
+			return err
+		}
+		for _, user := range users {
+			links, err := s.linkRepo.GetUserLinks(ctx, user.ID)
+			if err != nil {
+				continue
+			}
+			for _, link := range links {
+				if link.ProviderID == providerID {
+					if err := s.linkRepo.DeleteLink(ctx, link.ID); err != nil {
+						return err
+					}
+				}
+			}
+		}
+	}
+
+	return s.providerRepo.DeleteProvider(ctx, providerID)
+}
+
 // ListUsers returns all users as admin DTOs
 func (s *AdminService) ListUsers(ctx context.Context) ([]*dto.AdminUserDTO, error) {
 	users, err := s.userRepo.ListAllUsers(ctx)

backend/internal/application/services/auth_service.go

@@ -114,20 +114,7 @@ func (s *AuthService) Register(ctx context.Context, req *dto.RegisterRequest) (*
 		}
 	}
 
-	// Generate tokens
-	accessToken, err := s.jwtManager.GenerateAccessToken(user.ID.Hex(), user.Email, user.Username)
-	if err != nil {
-		return nil, err
-	}
-
-	refreshToken, err := s.jwtManager.GenerateRefreshToken(user.ID.Hex())
-	if err != nil {
-		return nil, err
-	}
-
 	return &dto.LoginResponse{
-		AccessToken:  accessToken,
-		RefreshToken: refreshToken,
 		User:      dto.NewUserDTO(user),
 		ExpiresIn: 3600, // 1 hour
 	}, nil
@@ -165,20 +152,7 @@ func (s *AuthService) Login(ctx context.Context, req *dto.LoginRequest) (*dto.Lo
 		// Log error but don't fail the login
 	}
 
-	// Generate tokens
-	accessToken, err := s.jwtManager.GenerateAccessToken(user.ID.Hex(), user.Email, user.Username)
-	if err != nil {
-		return nil, err
-	}
-
-	refreshToken, err := s.jwtManager.GenerateRefreshToken(user.ID.Hex())
-	if err != nil {
-		return nil, err
-	}
-
 	return &dto.LoginResponse{
-		AccessToken:  accessToken,
-		RefreshToken: refreshToken,
 		User:      dto.NewUserDTO(user),
 		ExpiresIn: 3600,
 	}, nil
@@ -186,6 +160,10 @@ func (s *AuthService) Login(ctx context.Context, req *dto.LoginRequest) (*dto.Lo
 
 // RefreshAccessToken refreshes an access token
 func (s *AuthService) RefreshAccessToken(ctx context.Context, refreshToken string) (string, error) {
+	if s.jwtManager == nil {
+		return "", errors.New("jwt refresh is unavailable")
+	}
+
 	claims, err := s.jwtManager.VerifyRefreshToken(refreshToken)
 	if err != nil {
 		return "", err
@@ -199,6 +177,27 @@ func (s *AuthService) RefreshAccessToken(ctx context.Context, refreshToken strin
 	return s.jwtManager.GenerateAccessToken(user.ID.Hex(), user.Email, user.Username)
 }
 
+// GetUserProfile returns profile DTO for the provided user ID.
+func (s *AuthService) GetUserProfile(ctx context.Context, userID string) (*dto.UserDTO, error) {
+	objID, err := bson.ObjectIDFromHex(strings.TrimSpace(userID))
+	if err != nil {
+		return nil, errors.New("invalid user id")
+	}
+
+	user, err := s.userRepo.GetUserByID(ctx, objID)
+	if err != nil {
+		return nil, err
+	}
+
+	if s.permissionService != nil {
+		if err := s.permissionService.UpdateUserEffectivePermissions(ctx, user); err != nil {
+			return nil, err
+		}
+	}
+
+	return dto.NewUserDTO(user), nil
+}
+
 // RequestPasswordReset initiates password reset flow
 func (s *AuthService) RequestPasswordReset(ctx context.Context, email string) error {
 	user, err := s.userRepo.GetUserByEmail(ctx, email)
@@ -319,6 +318,57 @@ func (s *AuthService) CreateProvider(ctx context.Context, req *dto.CreateAuthPro
 	return dto.NewAuthProviderDTO(provider), nil
 }
 
+// UpdateProvider updates an existing OAuth/OIDC provider.
+// If ClientSecret is empty, the existing encrypted secret is preserved.
+func (s *AuthService) UpdateProvider(ctx context.Context, providerID bson.ObjectID, req *dto.UpdateAuthProviderRequest) (*dto.AuthProviderDTO, error) {
+	if s.providerRepo == nil || s.encryptor == nil {
+		return nil, errors.New("provider configuration unavailable")
+	}
+
+	existing, err := s.providerRepo.GetProviderByID(ctx, providerID)
+	if err != nil {
+		return nil, err
+	}
+
+	providerType := strings.ToLower(strings.TrimSpace(req.Type))
+	if providerType != "oidc" && providerType != "oauth2" {
+		return nil, errors.New("provider type must be oidc or oauth2")
+	}
+
+	name := strings.TrimSpace(req.Name)
+	clientID := strings.TrimSpace(req.ClientID)
+	authorizationURL := strings.TrimSpace(req.AuthorizationURL)
+	tokenURL := strings.TrimSpace(req.TokenURL)
+	if name == "" || clientID == "" || authorizationURL == "" || tokenURL == "" {
+		return nil, errors.New("missing required provider fields")
+	}
+
+	existing.Name = name
+	existing.Type = providerType
+	existing.ClientID = clientID
+	existing.AuthorizationURL = authorizationURL
+	existing.TokenURL = tokenURL
+	existing.UserInfoURL = strings.TrimSpace(req.UserInfoURL)
+	existing.Scopes = normalizeScopes(req.Scopes, providerType)
+	existing.IDTokenClaim = strings.TrimSpace(req.IDTokenClaim)
+	existing.IsActive = req.IsActive
+
+	clientSecret := strings.TrimSpace(req.ClientSecret)
+	if clientSecret != "" {
+		encrypted, err := s.encryptor.Encrypt(clientSecret)
+		if err != nil {
+			return nil, err
+		}
+		existing.ClientSecret = encrypted
+	}
+
+	if err := s.providerRepo.UpdateProvider(ctx, existing); err != nil {
+		return nil, err
+	}
+
+	return dto.NewAuthProviderDTO(existing), nil
+}
+
 // BuildProviderAuthorizationURL constructs a provider authorization URL.
 func (s *AuthService) BuildProviderAuthorizationURL(ctx context.Context, providerID bson.ObjectID, redirectURI, state string) (string, error) {
 	flags, err := s.GetFeatureFlags(ctx)
@@ -393,17 +443,7 @@ func (s *AuthService) CompleteProviderLogin(ctx context.Context, providerID bson
 		return nil, err
 	}
 
-	accessToken, err := s.jwtManager.GenerateAccessToken(user.ID.Hex(), user.Email, user.Username)
+	return &dto.LoginResponse{User: dto.NewUserDTO(user), ExpiresIn: 3600}, nil
-	if err != nil {
-		return nil, err
-	}
-
-	refreshToken, err := s.jwtManager.GenerateRefreshToken(user.ID.Hex())
-	if err != nil {
-		return nil, err
-	}
-
-	return &dto.LoginResponse{AccessToken: accessToken, RefreshToken: refreshToken, User: dto.NewUserDTO(user), ExpiresIn: 3600}, nil
 }
 
 type providerProfile struct {

backend/internal/infrastructure/auth/session.go

@@ -0,0 +1,114 @@
+package auth
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"time"
+
+	"github.com/redis/go-redis/v9"
+)
+
+// SessionData stores authenticated identity data in Redis.
+type SessionData struct {
+	UserID   string `json:"user_id"`
+	Email    string `json:"email"`
+	Username string `json:"username"`
+}
+
+// SessionManager handles Redis-backed session lifecycle operations.
+type SessionManager struct {
+	redis  *redis.Client
+	ttl    time.Duration
+	prefix string
+}
+
+func NewSessionManager(redisClient *redis.Client, ttl time.Duration) *SessionManager {
+	if ttl <= 0 {
+		ttl = 7 * 24 * time.Hour
+	}
+
+	return &SessionManager{
+		redis:  redisClient,
+		ttl:    ttl,
+		prefix: "session:",
+	}
+}
+
+func (m *SessionManager) TTL() time.Duration {
+	return m.ttl
+}
+
+func (m *SessionManager) CreateSession(ctx context.Context, data *SessionData) (string, error) {
+	if data == nil {
+		return "", errors.New("session data is required")
+	}
+
+	sessionID, err := GenerateRandomToken(32)
+	if err != nil {
+		return "", err
+	}
+
+	payload, err := json.Marshal(data)
+	if err != nil {
+		return "", err
+	}
+
+	if err := m.redis.Set(ctx, m.key(sessionID), payload, m.ttl).Err(); err != nil {
+		return "", err
+	}
+
+	return sessionID, nil
+}
+
+func (m *SessionManager) GetSession(ctx context.Context, sessionID string) (*SessionData, error) {
+	if sessionID == "" {
+		return nil, errors.New("session id is required")
+	}
+
+	payload, err := m.redis.Get(ctx, m.key(sessionID)).Result()
+	if err != nil {
+		if errors.Is(err, redis.Nil) {
+			return nil, errors.New("session not found")
+		}
+		return nil, err
+	}
+
+	var data SessionData
+	if err := json.Unmarshal([]byte(payload), &data); err != nil {
+		return nil, err
+	}
+
+	return &data, nil
+}
+
+func (m *SessionManager) RefreshSession(ctx context.Context, sessionID string) error {
+	if sessionID == "" {
+		return errors.New("session id is required")
+	}
+
+	if err := m.redis.Expire(ctx, m.key(sessionID), m.ttl).Err(); err != nil {
+		if errors.Is(err, redis.Nil) {
+			return errors.New("session not found")
+		}
+		return err
+	}
+
+	return nil
+}
+
+func (m *SessionManager) DeleteSession(ctx context.Context, sessionID string) error {
+	if sessionID == "" {
+		return nil
+	}
+
+	if err := m.redis.Del(ctx, m.key(sessionID)).Err(); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func (m *SessionManager) key(sessionID string) string {
+	return m.prefix + sessionID
+}

backend/internal/interfaces/handlers/admin_handler.go

@@ -5,6 +5,7 @@ import (
 	"net/http"
 
 	"github.com/gorilla/mux"
+	"github.com/noteapp/backend/internal/interfaces/middleware"
 	"go.mongodb.org/mongo-driver/v2/bson"
 
 	"github.com/noteapp/backend/internal/application/dto"
@@ -32,6 +33,33 @@ func (h *AdminHandler) ListUsers(w http.ResponseWriter, r *http.Request) {
 	json.NewEncoder(w).Encode(map[string]interface{}{"users": users})
 }
 
+// DeleteUser handles DELETE /admin/users/{userId}
+func (h *AdminHandler) DeleteUser(w http.ResponseWriter, r *http.Request) {
+	targetUserID, err := bson.ObjectIDFromHex(mux.Vars(r)["userId"])
+	if err != nil {
+		http.Error(w, "invalid user id", http.StatusBadRequest)
+		return
+	}
+
+	currentUserIDHex, err := middleware.GetUserIDFromContext(r.Context())
+	if err != nil {
+		http.Error(w, "unauthorized", http.StatusUnauthorized)
+		return
+	}
+	currentUserID, err := bson.ObjectIDFromHex(currentUserIDHex)
+	if err != nil {
+		http.Error(w, "unauthorized", http.StatusUnauthorized)
+		return
+	}
+
+	if err := h.adminService.DeleteUser(r.Context(), currentUserID, targetUserID); err != nil {
+		http.Error(w, err.Error(), http.StatusBadRequest)
+		return
+	}
+
+	w.WriteHeader(http.StatusNoContent)
+}
+
 // UpdateUserGroups handles PUT /admin/users/{userId}/groups
 func (h *AdminHandler) UpdateUserGroups(w http.ResponseWriter, r *http.Request) {
 	userID, err := bson.ObjectIDFromHex(mux.Vars(r)["userId"])
@@ -66,6 +94,22 @@ func (h *AdminHandler) UpdateUserGroups(w http.ResponseWriter, r *http.Request)
 	json.NewEncoder(w).Encode(user)
 }
 
+// DeleteGroup handles DELETE /admin/groups/{groupId}
+func (h *AdminHandler) DeleteGroup(w http.ResponseWriter, r *http.Request) {
+	groupID, err := bson.ObjectIDFromHex(mux.Vars(r)["groupId"])
+	if err != nil {
+		http.Error(w, "invalid group id", http.StatusBadRequest)
+		return
+	}
+
+	if err := h.adminService.DeleteGroup(r.Context(), groupID); err != nil {
+		http.Error(w, err.Error(), http.StatusBadRequest)
+		return
+	}
+
+	w.WriteHeader(http.StatusNoContent)
+}
+
 // ListGroups handles GET /admin/groups
 func (h *AdminHandler) ListGroups(w http.ResponseWriter, r *http.Request) {
 	groups, err := h.adminService.ListGroups(r.Context())
@@ -292,3 +336,19 @@ func (h *AdminHandler) UpdateFeatureFlags(w http.ResponseWriter, r *http.Request
 	w.Header().Set("Content-Type", "application/json")
 	json.NewEncoder(w).Encode(flags)
 }
+
+// DeleteProvider handles DELETE /admin/auth/providers/{providerId}
+func (h *AdminHandler) DeleteProvider(w http.ResponseWriter, r *http.Request) {
+	providerID, err := bson.ObjectIDFromHex(mux.Vars(r)["providerId"])
+	if err != nil {
+		http.Error(w, "invalid provider id", http.StatusBadRequest)
+		return
+	}
+
+	if err := h.adminService.DeleteProvider(r.Context(), providerID); err != nil {
+		http.Error(w, err.Error(), http.StatusBadRequest)
+		return
+	}
+
+	w.WriteHeader(http.StatusNoContent)
+}

backend/internal/interfaces/handlers/auth_handler.go

@@ -1,7 +1,6 @@
 package handlers
 
 import (
-	"encoding/base64"
 	"encoding/json"
 	"net/http"
 	"net/url"
@@ -18,15 +17,19 @@ import (
 // AuthHandler handles authentication endpoints
 type AuthHandler struct {
 	authService    *services.AuthService
+	sessionManager *auth.SessionManager
 }
 
 // NewAuthHandler creates a new auth handler
-func NewAuthHandler(authService *services.AuthService) *AuthHandler {
+func NewAuthHandler(authService *services.AuthService, sessionManager *auth.SessionManager) *AuthHandler {
 	return &AuthHandler{
 		authService:    authService,
+		sessionManager: sessionManager,
 	}
 }
 
+const sessionCookieName = "session_id"
+
 // Register handles user registration
 func (h *AuthHandler) Register(w http.ResponseWriter, r *http.Request) {
 	if r.Method != http.MethodPost {
@@ -56,6 +59,11 @@ func (h *AuthHandler) Register(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
+	if err := h.setSessionCookie(w, r, response.User); err != nil {
+		http.Error(w, "Failed to create session", http.StatusInternalServerError)
+		return
+	}
+
 	w.Header().Set("Content-Type", "application/json")
 	json.NewEncoder(w).Encode(response)
 }
@@ -79,16 +87,10 @@ func (h *AuthHandler) Login(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	// Set secure HTTP-only cookie for refresh token
+	if err := h.setSessionCookie(w, r, response.User); err != nil {
-	http.SetCookie(w, &http.Cookie{
+		http.Error(w, "Failed to create session", http.StatusInternalServerError)
-		Name:     "refresh_token",
+		return
-		Value:    response.RefreshToken,
+	}
-		Path:     "/",
-		MaxAge:   7 * 24 * 60 * 60, // 7 days
-		HttpOnly: true,
-		Secure:   isSecureRequest(r),
-		SameSite: http.SameSiteLaxMode,
-	})
 
 	w.Header().Set("Content-Type", "application/json")
 	json.NewEncoder(w).Encode(response)
@@ -96,15 +98,12 @@ func (h *AuthHandler) Login(w http.ResponseWriter, r *http.Request) {
 
 // Logout handles user logout
 func (h *AuthHandler) Logout(w http.ResponseWriter, r *http.Request) {
-	// Clear refresh token cookie
+	sessionCookie, err := r.Cookie(sessionCookieName)
-	http.SetCookie(w, &http.Cookie{
+	if err == nil {
-		Name:     "refresh_token",
+		_ = h.sessionManager.DeleteSession(r.Context(), sessionCookie.Value)
-		Value:    "",
+	}
-		Path:     "/",
+
-		MaxAge:   -1,
+	h.clearSessionCookie(w, r)
-		HttpOnly: true,
-		Secure:   isSecureRequest(r),
-	})
 
 	w.Header().Set("Content-Type", "application/json")
 	json.NewEncoder(w).Encode(map[string]string{"message": "Logged out successfully"})
@@ -141,6 +140,30 @@ func (h *AuthHandler) CreateProvider(w http.ResponseWriter, r *http.Request) {
 	json.NewEncoder(w).Encode(provider)
 }
 
+// UpdateProvider updates an existing OAuth/OIDC provider configuration.
+func (h *AuthHandler) UpdateProvider(w http.ResponseWriter, r *http.Request) {
+	providerID, err := bson.ObjectIDFromHex(mux.Vars(r)["providerId"])
+	if err != nil {
+		http.Error(w, "Invalid provider ID", http.StatusBadRequest)
+		return
+	}
+
+	var req dto.UpdateAuthProviderRequest
+	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+		http.Error(w, "Invalid request body", http.StatusBadRequest)
+		return
+	}
+
+	provider, err := h.authService.UpdateProvider(r.Context(), providerID, &req)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusBadRequest)
+		return
+	}
+
+	w.Header().Set("Content-Type", "application/json")
+	json.NewEncoder(w).Encode(provider)
+}
+
 // StartProviderLogin redirects the browser to the selected provider.
 func (h *AuthHandler) StartProviderLogin(w http.ResponseWriter, r *http.Request) {
 	providerID, err := bson.ObjectIDFromHex(mux.Vars(r)["providerId"])
@@ -191,7 +214,7 @@ func (h *AuthHandler) CompleteProviderLogin(w http.ResponseWriter, r *http.Reque
 
 	response, err := h.authService.CompleteProviderLogin(r.Context(), providerID, r.URL.Query().Get("code"), buildBackendURL(r, "/api/v1/auth/providers/"+providerID.Hex()+"/callback"))
 	if err != nil {
-		http.Redirect(w, r, buildFrontendLoginURL("oauth_error", err.Error(), "", nil), http.StatusFound)
+		http.Redirect(w, r, buildFrontendLoginURL("oauth_error", err.Error()), http.StatusFound)
 		return
 	}
 
@@ -205,17 +228,12 @@ func (h *AuthHandler) CompleteProviderLogin(w http.ResponseWriter, r *http.Reque
 		SameSite: http.SameSiteLaxMode,
 	})
 
-	http.SetCookie(w, &http.Cookie{
+	if err := h.setSessionCookie(w, r, response.User); err != nil {
-		Name:     "refresh_token",
+		http.Redirect(w, r, buildFrontendLoginURL("oauth_error", "Failed to create session"), http.StatusFound)
-		Value:    response.RefreshToken,
+		return
-		Path:     "/",
+	}
-		MaxAge:   7 * 24 * 60 * 60,
-		HttpOnly: true,
-		Secure:   isSecureRequest(r),
-		SameSite: http.SameSiteLaxMode,
-	})
 
-	http.Redirect(w, r, buildFrontendLoginURL("oauth_success", "", response.AccessToken, response.User), http.StatusFound)
+	http.Redirect(w, r, buildFrontendLoginURL("oauth_success", ""), http.StatusFound)
 }
 
 // RefreshToken handles token refresh
@@ -225,23 +243,57 @@ func (h *AuthHandler) RefreshToken(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	// Get refresh token from cookie
+	cookie, err := r.Cookie(sessionCookieName)
-	cookie, err := r.Cookie("refresh_token")
 	if err != nil {
-		http.Error(w, "Refresh token not found", http.StatusUnauthorized)
+		http.Error(w, "Session not found", http.StatusUnauthorized)
 		return
 	}
 
-	accessToken, err := h.authService.RefreshAccessToken(r.Context(), cookie.Value)
+	sessionData, err := h.sessionManager.GetSession(r.Context(), cookie.Value)
 	if err != nil {
-		http.Error(w, "Invalid refresh token", http.StatusUnauthorized)
+		http.Error(w, "Invalid session", http.StatusUnauthorized)
 		return
 	}
+	if err := h.sessionManager.RefreshSession(r.Context(), cookie.Value); err == nil {
+		http.SetCookie(w, h.newSessionCookie(r, cookie.Value))
+	}
 
 	w.Header().Set("Content-Type", "application/json")
 	json.NewEncoder(w).Encode(map[string]interface{}{
-		"access_token": accessToken,
+		"user":       sessionData,
-		"expires_in":   3600,
+		"expires_in": int(h.sessionManager.TTL().Seconds()),
+	})
+}
+
+// Me returns the currently authenticated user profile.
+func (h *AuthHandler) Me(w http.ResponseWriter, r *http.Request) {
+	sessionCookie, err := r.Cookie(sessionCookieName)
+	if err != nil {
+		http.Error(w, "Unauthorized", http.StatusUnauthorized)
+		return
+	}
+
+	sessionData, err := h.sessionManager.GetSession(r.Context(), sessionCookie.Value)
+	if err != nil {
+		h.clearSessionCookie(w, r)
+		http.Error(w, "Unauthorized", http.StatusUnauthorized)
+		return
+	}
+
+	user, err := h.authService.GetUserProfile(r.Context(), sessionData.UserID)
+	if err != nil {
+		http.Error(w, "Unauthorized", http.StatusUnauthorized)
+		return
+	}
+
+	if err := h.sessionManager.RefreshSession(r.Context(), sessionCookie.Value); err == nil {
+		http.SetCookie(w, h.newSessionCookie(r, sessionCookie.Value))
+	}
+
+	w.Header().Set("Content-Type", "application/json")
+	json.NewEncoder(w).Encode(map[string]interface{}{
+		"user":       user,
+		"expires_in": int(h.sessionManager.TTL().Seconds()),
 	})
 }
 
@@ -268,7 +320,7 @@ func buildBackendURL(r *http.Request, path string) string {
 	return scheme + "://" + r.Host + path
 }
 
-func buildFrontendLoginURL(status, message, accessToken string, user *dto.UserDTO) string {
+func buildFrontendLoginURL(status, message string) string {
 	frontendURL := os.Getenv("FRONTEND_URL")
 	if frontendURL == "" {
 		frontendURL = "http://localhost:5173"
@@ -286,14 +338,48 @@ func buildFrontendLoginURL(status, message, accessToken string, user *dto.UserDT
 	if message != "" {
 		query.Set("message", message)
 	}
-	if accessToken != "" {
-		query.Set("access_token", accessToken)
-	}
-	if user != nil {
-		payload, _ := json.Marshal(user)
-		query.Set("user_json", string(payload))
-		query.Set("user", base64.RawURLEncoding.EncodeToString(payload))
-	}
 	parsed.RawQuery = query.Encode()
 	return parsed.String()
 }
+
+func (h *AuthHandler) setSessionCookie(w http.ResponseWriter, r *http.Request, user *dto.UserDTO) error {
+	if user == nil {
+		return nil
+	}
+
+	sessionID, err := h.sessionManager.CreateSession(r.Context(), &auth.SessionData{
+		UserID:   user.ID,
+		Email:    user.Email,
+		Username: user.Username,
+	})
+	if err != nil {
+		return err
+	}
+
+	http.SetCookie(w, h.newSessionCookie(r, sessionID))
+	return nil
+}
+
+func (h *AuthHandler) newSessionCookie(r *http.Request, sessionID string) *http.Cookie {
+	return &http.Cookie{
+		Name:     sessionCookieName,
+		Value:    sessionID,
+		Path:     "/",
+		MaxAge:   int(h.sessionManager.TTL().Seconds()),
+		HttpOnly: true,
+		Secure:   isSecureRequest(r),
+		SameSite: http.SameSiteLaxMode,
+	}
+}
+
+func (h *AuthHandler) clearSessionCookie(w http.ResponseWriter, r *http.Request) {
+	http.SetCookie(w, &http.Cookie{
+		Name:     sessionCookieName,
+		Value:    "",
+		Path:     "/",
+		MaxAge:   -1,
+		HttpOnly: true,
+		Secure:   isSecureRequest(r),
+		SameSite: http.SameSiteLaxMode,
+	})
+}

backend/internal/interfaces/middleware/auth.go

@@ -21,12 +21,14 @@ const (
 // AuthMiddleware verifies JWT tokens
 type AuthMiddleware struct {
 	jwtManager     *auth.JWTManager
+	sessionManager *auth.SessionManager
 }
 
 // NewAuthMiddleware creates a new auth middleware
-func NewAuthMiddleware(jwtManager *auth.JWTManager) *AuthMiddleware {
+func NewAuthMiddleware(jwtManager *auth.JWTManager, sessionManager *auth.SessionManager) *AuthMiddleware {
 	return &AuthMiddleware{
 		jwtManager:     jwtManager,
+		sessionManager: sessionManager,
 	}
 }
 
@@ -41,16 +43,23 @@ func (m *AuthMiddleware) Middleware(next http.Handler) http.Handler {
 			return
 		}
 
-		// Extract token from Authorization header.
+		if sessionCookie, err := r.Cookie("session_id"); err == nil && sessionCookie.Value != "" {
-		// For GET /files/object, also accept ?token= so markdown images render in-browser.
+			sessionData, sessionErr := m.sessionManager.GetSession(r.Context(), sessionCookie.Value)
+			if sessionErr == nil {
+				_ = m.sessionManager.RefreshSession(r.Context(), sessionCookie.Value)
+
+				ctx := context.WithValue(r.Context(), UserIDKey, sessionData.UserID)
+				ctx = context.WithValue(ctx, EmailKey, sessionData.Email)
+				r = r.WithContext(ctx)
+				next.ServeHTTP(w, r)
+				return
+			}
+		}
+
+		// Fall back to Authorization header for backwards compatibility.
 		authHeader := r.Header.Get("Authorization")
-		if authHeader == "" && r.Method == http.MethodGet && strings.HasSuffix(r.URL.Path, "/files/object") {
-			if tok := r.URL.Query().Get("token"); tok != "" {
-				authHeader = "Bearer " + tok
-			}
-		}
 		if authHeader == "" {
-			http.Error(w, "Missing authorization header", http.StatusUnauthorized)
+			http.Error(w, "Unauthorized", http.StatusUnauthorized)
 			return
 		}
 

backend/internal/interfaces/middleware/security.go

@@ -79,6 +79,7 @@ func CORSMiddleware(next http.Handler) http.Handler {
 		}
 		w.Header().Set("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS, PATCH")
 		w.Header().Set("Access-Control-Allow-Headers", "Content-Type, Authorization, X-Requested-With")
+		w.Header().Set("Access-Control-Allow-Credentials", "true")
 		w.Header().Set("Access-Control-Max-Age", "600")
 
 		if r.Method == http.MethodOptions {

devops/docker/nginx.conf

@@ -44,20 +44,6 @@ http {
         listen 80;
         server_name localhost;
 
-        # API routes
-        location /api/ {
-            limit_req zone=api_limit burst=20 nodelay;
-
-            proxy_pass http://notely;
-            proxy_set_header Host $host;
-            proxy_set_header X-Real-IP $remote_addr;
-            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
-            proxy_set_header X-Forwarded-Proto $scheme;
-            proxy_connect_timeout 60s;
-            proxy_send_timeout 60s;
-            proxy_read_timeout 60s;
-        }
-
         # Health check
         location /health {
             proxy_pass http://notely;

docker-compose.yml

@@ -1,6 +1,17 @@
-version: "3.8"
-
 services:
+  redis:
+    image: redis:8-alpine
+    container_name: notely-redis
+    ports:
+      - "6379:6379"
+    networks:
+      - notely-network
+    healthcheck:
+      test: ["CMD", "redis-cli", "ping"]
+      interval: 10s
+      timeout: 5s
+      retries: 5
+
   mongodb:
     image: mongo:8.0
     container_name: notely-mongodb
@@ -39,9 +50,15 @@ services:
       DEFAULT_ADMIN_EMAIL: ${DEFAULT_ADMIN_EMAIL}
       DEFAULT_ADMIN_USERNAME: ${DEFAULT_ADMIN_USERNAME}
       DEFAULT_ADMIN_PASSWORD: ${DEFAULT_ADMIN_PASSWORD}
+      REDIS_ADDR: ${REDIS_ADDR}
+      REDIS_PASSWORD: ${REDIS_PASSWORD}
+      REDIS_DB: ${REDIS_DB}
+      SESSION_TTL_HOURS: ${SESSION_TTL_HOURS}
     depends_on:
       mongodb:
         condition: service_healthy
+      redis:
+        condition: service_healthy
     networks:
       - notely-network
 

frontend/package-lock.json

@@ -13,7 +13,9 @@
                 "axios": "^1.4.0",
                 "bootstrap": "^5.3.0",
                 "dompurify": "^3.0.0",
+                "highlight.js": "^11.11.1",
                 "marked": "^9.0.0",
+                "marked-highlight": "^2.2.3",
                 "pinia": "^2.1.0",
                 "vue": "^3.3.0",
                 "vue-router": "^4.2.0"
@@ -1433,6 +1435,15 @@
                 "node": ">= 0.4"
             }
         },
+        "node_modules/highlight.js": {
+            "version": "11.11.1",
+            "resolved": "https://registry.npmjs.org/highlight.js/-/highlight.js-11.11.1.tgz",
+            "integrity": "sha512-Xwwo44whKBVCYoliBQwaPvtd/2tYFkRQtXDWj1nackaV2JPXx3L0+Jvd8/qCJ2p+ML0/XVkJ2q+Mr+UVdpJK5w==",
+            "license": "BSD-3-Clause",
+            "engines": {
+                "node": ">=12.0.0"
+            }
+        },
         "node_modules/ini": {
             "version": "1.3.8",
             "resolved": "https://registry.npmjs.org/ini/-/ini-1.3.8.tgz",
@@ -1556,6 +1567,15 @@
                 "node": ">= 16"
             }
         },
+        "node_modules/marked-highlight": {
+            "version": "2.2.3",
+            "resolved": "https://registry.npmjs.org/marked-highlight/-/marked-highlight-2.2.3.tgz",
+            "integrity": "sha512-FCfZRxW/msZAiasCML4isYpxyQWKEEx44vOgdn5Kloae+Qc3q4XR7WjpKKf8oMLk7JP9ZCRd2vhtclJFdwxlWQ==",
+            "license": "MIT",
+            "peerDependencies": {
+                "marked": ">=4 <18"
+            }
+        },
         "node_modules/math-intrinsics": {
             "version": "1.1.0",
             "resolved": "https://registry.npmjs.org/math-intrinsics/-/math-intrinsics-1.1.0.tgz",

frontend/package.json

@@ -15,7 +15,9 @@
         "axios": "^1.4.0",
         "bootstrap": "^5.3.0",
         "dompurify": "^3.0.0",
+        "highlight.js": "^11.11.1",
         "marked": "^9.0.0",
+        "marked-highlight": "^2.2.3",
         "pinia": "^2.1.0",
         "vue": "^3.3.0",
         "vue-router": "^4.2.0"

frontend/src/App.vue

@@ -205,7 +205,7 @@
             </div>
         </div>
 
-        <div v-else-if="currentUser && isAdminRoute" class="container py-4">
+        <div v-else-if="currentUser && isAdminRoute" class="admin-route-view">
             <router-view />
         </div>
 
@@ -965,6 +965,16 @@ const logout = () => {
     display: block;
 }
 
+.admin-route-view {
+    flex: 1;
+    min-height: 0;
+    overflow: hidden;
+    display: flex;
+    flex-direction: column;
+    width: 100%;
+    padding: 0;
+}
+
 @media (max-width: 768px) {
     .app-navbar {
         display: grid;

frontend/src/assets/styles/main.css

@@ -25,6 +25,70 @@ body,
     width: 100%;
 }
 
+.markdown-body table {
+    width: 100%;
+    margin: 1rem 0;
+    border-collapse: collapse;
+    border-spacing: 0;
+    background: #fff;
+}
+
+.markdown-body th,
+.markdown-body td {
+    padding: 0.7rem 0.9rem;
+    border: 1px solid var(--border-color);
+    text-align: left;
+    vertical-align: top;
+}
+
+.markdown-body th {
+    font-weight: 600;
+    background: #f3f6fb;
+}
+
+.markdown-body tr:nth-child(even) td {
+    background: #fbfcfe;
+}
+
+.markdown-body table code {
+    white-space: nowrap;
+}
+
+.markdown-body blockquote {
+    margin: 1rem 0;
+    padding: 0.75rem 1rem;
+    border-left: 4px solid #748ffc;
+    background: #f8f9ff;
+    color: #334155;
+}
+
+.markdown-body blockquote > :last-child {
+    margin-bottom: 0;
+}
+
+.markdown-body pre {
+    margin: 1rem 0;
+    padding: 1rem;
+    border-radius: 0.75rem;
+    background: #111827;
+    color: #f9fafb;
+    overflow-x: auto;
+}
+
+.markdown-body pre code {
+    background: transparent;
+    color: inherit;
+    padding: 0;
+}
+
+.markdown-body code {
+    font-family: "Courier New", monospace;
+    font-size: 0.95em;
+    padding: 0.1rem 0.3rem;
+    border-radius: 0.35rem;
+    background: #f1f3f5;
+}
+
 /* Scrollbar styling */
 ::-webkit-scrollbar {
     width: 8px;

frontend/src/components/AdminGroupModal.vue

@@ -0,0 +1,125 @@
+<template>
+    <teleport to="body">
+        <div class="modal fade show d-block admin-modal" tabindex="-1" role="dialog" aria-modal="true" @click.self="emit('close')">
+            <div class="modal-dialog modal-lg modal-dialog-centered modal-dialog-scrollable" role="document">
+                <div class="modal-content">
+                    <div class="modal-header">
+                        <h5 class="modal-title">{{ mode === "create" ? "Create Group" : "Edit Group" }}</h5>
+                        <button type="button" class="btn-close" aria-label="Close" @click="emit('close')"></button>
+                    </div>
+                    <form @submit.prevent="handleSubmit">
+                        <div class="modal-body">
+                            <div class="mb-3">
+                                <label class="form-label">Group name</label>
+                                <input v-model="form.name" class="form-control" type="text" required :disabled="isSystemGroup" />
+                            </div>
+
+                            <div class="mb-3">
+                                <label class="form-label">Description</label>
+                                <input v-model="form.description" class="form-control" type="text" :disabled="isSystemGroup" />
+                            </div>
+
+                            <div>
+                                <label class="form-label">Permissions (one per line)</label>
+                                <textarea
+                                    v-model="form.permissionsText"
+                                    class="form-control permissions-textarea"
+                                    rows="10"
+                                    placeholder="space.create&#10;space.project_docs.category.create&#10;space.project_docs.*"
+                                    :disabled="isSystemGroup"
+                                ></textarea>
+                            </div>
+                        </div>
+                        <div class="modal-footer">
+                            <button type="button" class="btn btn-outline-secondary" @click="emit('close')">Cancel</button>
+                            <button v-if="!isSystemGroup" type="submit" class="btn btn-primary" :disabled="submitting">
+                                {{ submitting ? "Saving..." : mode === "create" ? "Create Group" : "Save Changes" }}
+                            </button>
+                        </div>
+                    </form>
+                </div>
+            </div>
+        </div>
+        <div class="modal-backdrop fade show admin-modal-backdrop"></div>
+    </teleport>
+</template>
+
+<script setup>
+import { ref, watch } from "vue";
+
+const props = defineProps({
+    mode: {
+        type: String,
+        default: "create",
+    },
+    group: {
+        type: Object,
+        default: null,
+    },
+    isSystemGroup: {
+        type: Boolean,
+        default: false,
+    },
+    submitting: {
+        type: Boolean,
+        default: false,
+    },
+});
+
+const emit = defineEmits(["close", "submit"]);
+
+const form = ref({
+    name: "",
+    description: "",
+    permissionsText: "",
+});
+
+const hydrateForm = () => {
+    form.value = {
+        name: props.group?.name || "",
+        description: props.group?.description || "",
+        permissionsText: (props.group?.permissions || []).join("\n"),
+    };
+};
+
+watch(() => [props.mode, props.group], hydrateForm, { immediate: true });
+
+const handleSubmit = () => {
+    emit("submit", {
+        name: form.value.name,
+        description: form.value.description,
+        permissionsText: form.value.permissionsText,
+    });
+};
+</script>
+
+<style scoped>
+.admin-modal {
+    z-index: 2000;
+    overflow-y: auto;
+    padding-top: max(0.5rem, env(safe-area-inset-top));
+}
+
+.admin-modal-backdrop {
+    z-index: 1990;
+}
+
+.admin-modal .modal-dialog {
+    margin: 1rem auto;
+}
+
+.permissions-textarea {
+    font-family: "Courier New", monospace;
+}
+
+@media (max-width: 767.98px) {
+    .admin-modal {
+        padding-top: max(0.75rem, env(safe-area-inset-top));
+    }
+
+    .admin-modal .modal-dialog {
+        margin: 0.75rem;
+        max-width: none;
+    }
+}
+</style>

frontend/src/components/AdminProviderModal.vue

@@ -0,0 +1,187 @@
+<template>
+    <teleport to="body">
+        <div class="modal fade show d-block admin-modal" tabindex="-1" role="dialog" aria-modal="true" @click.self="emit('close')">
+            <div class="modal-dialog modal-lg modal-dialog-centered modal-dialog-scrollable" role="document">
+                <div class="modal-content">
+                    <div class="modal-header">
+                        <h5 class="modal-title">{{ mode === "create" ? "Add Identity Provider" : "Edit Identity Provider" }}</h5>
+                        <button type="button" class="btn-close" aria-label="Close" @click="emit('close')"></button>
+                    </div>
+                    <form @submit.prevent="handleSubmit">
+                        <div class="modal-body">
+                            <div class="row g-3">
+                                <div class="col-md-6">
+                                    <label class="form-label">Display Name <span class="text-danger">*</span></label>
+                                    <input v-model="form.name" type="text" class="form-control" required />
+                                </div>
+                                <div class="col-md-6">
+                                    <label class="form-label">Provider Type <span class="text-danger">*</span></label>
+                                    <select v-model="form.type" class="form-select">
+                                        <option value="oidc">OIDC</option>
+                                        <option value="oauth2">OAuth2</option>
+                                    </select>
+                                </div>
+                                <div class="col-md-6">
+                                    <label class="form-label">Client ID <span class="text-danger">*</span></label>
+                                    <input v-model="form.client_id" type="text" class="form-control" required />
+                                </div>
+                                <div class="col-md-6">
+                                    <label class="form-label">
+                                        Client Secret
+                                        <span v-if="mode === 'create'" class="text-danger">*</span>
+                                        <span v-else class="text-muted small">(leave blank to keep existing)</span>
+                                    </label>
+                                    <input v-model="form.client_secret" type="password" class="form-control" :required="mode === 'create'" autocomplete="new-password" />
+                                </div>
+                                <div class="col-md-6">
+                                    <label class="form-label">Authorization URL <span class="text-danger">*</span></label>
+                                    <input v-model="form.authorization_url" type="url" class="form-control" required />
+                                </div>
+                                <div class="col-md-6">
+                                    <label class="form-label">Token URL <span class="text-danger">*</span></label>
+                                    <input v-model="form.token_url" type="url" class="form-control" required />
+                                </div>
+                                <div class="col-md-6">
+                                    <label class="form-label">UserInfo URL</label>
+                                    <input v-model="form.userinfo_url" type="url" class="form-control" placeholder="Optional" />
+                                </div>
+                                <div class="col-md-6">
+                                    <label class="form-label">ID Token Claim</label>
+                                    <input v-model="form.id_token_claim" type="text" class="form-control" placeholder="id_token" />
+                                </div>
+                                <div class="col-12">
+                                    <label class="form-label">Scopes</label>
+                                    <input v-model="form.scopes" type="text" class="form-control" placeholder="openid, profile, email" />
+                                    <div class="form-text">Comma-separated list of OAuth scopes.</div>
+                                </div>
+                                <div class="col-12">
+                                    <div class="form-check">
+                                        <input id="provider-active" v-model="form.is_active" type="checkbox" class="form-check-input" />
+                                        <label for="provider-active" class="form-check-label">Provider is active</label>
+                                    </div>
+                                </div>
+                            </div>
+                        </div>
+                        <div class="modal-footer">
+                            <button type="button" class="btn btn-outline-secondary" @click="emit('close')">Cancel</button>
+                            <button type="submit" class="btn btn-primary" :disabled="submitting">
+                                {{ submitting ? "Saving..." : mode === "create" ? "Add Provider" : "Save Changes" }}
+                            </button>
+                        </div>
+                    </form>
+                </div>
+            </div>
+        </div>
+        <div class="modal-backdrop fade show admin-modal-backdrop"></div>
+    </teleport>
+</template>
+
+<script setup>
+import { ref, watch } from "vue";
+
+const props = defineProps({
+    mode: {
+        type: String,
+        default: "create",
+    },
+    provider: {
+        type: Object,
+        default: null,
+    },
+    submitting: {
+        type: Boolean,
+        default: false,
+    },
+});
+
+const emit = defineEmits(["close", "submit"]);
+
+const form = ref({
+    name: "",
+    type: "oidc",
+    client_id: "",
+    client_secret: "",
+    authorization_url: "",
+    token_url: "",
+    userinfo_url: "",
+    id_token_claim: "id_token",
+    scopes: "openid, profile, email",
+    is_active: true,
+});
+
+const hydrateForm = () => {
+    if (props.mode === "edit" && props.provider) {
+        form.value = {
+            name: props.provider.name || "",
+            type: props.provider.type || "oidc",
+            client_id: props.provider.client_id || "",
+            client_secret: "",
+            authorization_url: props.provider.authorization_url || "",
+            token_url: props.provider.token_url || "",
+            userinfo_url: props.provider.userinfo_url || "",
+            id_token_claim: props.provider.id_token_claim || "id_token",
+            scopes: (props.provider.scopes || []).join(", "),
+            is_active: props.provider.is_active ?? true,
+        };
+    } else {
+        form.value = {
+            name: "",
+            type: "oidc",
+            client_id: "",
+            client_secret: "",
+            authorization_url: "",
+            token_url: "",
+            userinfo_url: "",
+            id_token_claim: "id_token",
+            scopes: "openid, profile, email",
+            is_active: true,
+        };
+    }
+};
+
+watch(() => [props.mode, props.provider], hydrateForm, { immediate: true });
+
+const handleSubmit = () => {
+    emit("submit", {
+        name: form.value.name,
+        type: form.value.type,
+        client_id: form.value.client_id,
+        client_secret: form.value.client_secret,
+        authorization_url: form.value.authorization_url,
+        token_url: form.value.token_url,
+        userinfo_url: form.value.userinfo_url,
+        id_token_claim: form.value.id_token_claim,
+        scopes: form.value.scopes
+            .split(",")
+            .map((s) => s.trim())
+            .filter(Boolean),
+        is_active: form.value.is_active,
+    });
+};
+</script>
+
+<style scoped>
+.admin-modal {
+    z-index: 2000;
+    overflow-y: auto;
+    padding-top: max(0.5rem, env(safe-area-inset-top));
+}
+
+.admin-modal-backdrop {
+    z-index: 1990;
+}
+
+.admin-modal .modal-dialog {
+    margin: 1rem auto;
+}
+
+@media (max-width: 767.98px) {
+    .admin-modal {
+        padding-top: max(0.75rem, env(safe-area-inset-top));
+    }
+
+    .admin-modal .modal-dialog {
+        margin: 0.5rem;
+    }
+}
+</style>

frontend/src/components/AdminSpaceModal.vue

@@ -1,7 +1,7 @@
 <template>
     <teleport to="body">
-        <div class="modal fade show d-block" tabindex="-1" role="dialog" aria-modal="true" @click.self="emit('close')">
+        <div class="modal fade show d-block admin-modal" tabindex="-1" role="dialog" aria-modal="true" @click.self="emit('close')">
-            <div class="modal-dialog modal-xl modal-dialog-centered" role="document">
+            <div class="modal-dialog modal-xl modal-dialog-centered modal-dialog-scrollable" role="document">
                 <div class="modal-content">
                     <div class="modal-header">
                         <h5 class="modal-title">Edit Space</h5>
@@ -96,7 +96,7 @@
                 </div>
             </div>
         </div>
-        <div class="modal-backdrop fade show"></div>
+        <div class="modal-backdrop fade show admin-modal-backdrop"></div>
     </teleport>
 </template>
 
@@ -252,3 +252,30 @@ const deleteSpace = async () => {
     }
 };
 </script>
+
+<style scoped>
+.admin-modal {
+    z-index: 2000;
+    overflow-y: auto;
+    padding-top: max(0.5rem, env(safe-area-inset-top));
+}
+
+.admin-modal-backdrop {
+    z-index: 1990;
+}
+
+.admin-modal .modal-dialog {
+    margin: 1rem auto;
+}
+
+@media (max-width: 767.98px) {
+    .admin-modal {
+        padding-top: max(0.75rem, env(safe-area-inset-top));
+    }
+
+    .admin-modal .modal-dialog {
+        margin: 0.75rem;
+        max-width: none;
+    }
+}
+</style>

frontend/src/components/AdminUserModal.vue

@@ -0,0 +1,111 @@
+<template>
+    <teleport to="body">
+        <div class="modal fade show d-block admin-modal" tabindex="-1" role="dialog" aria-modal="true" @click.self="emit('close')">
+            <div class="modal-dialog modal-dialog-centered modal-dialog-scrollable" role="document">
+                <div class="modal-content">
+                    <div class="modal-header">
+                        <h5 class="modal-title">Edit User</h5>
+                        <button type="button" class="btn-close" aria-label="Close" @click="emit('close')"></button>
+                    </div>
+                    <form @submit.prevent="handleSubmit">
+                        <div class="modal-body">
+                            <div class="mb-3">
+                                <label class="form-label">Username</label>
+                                <input class="form-control" :value="user?.username || ''" type="text" disabled />
+                            </div>
+
+                            <div class="mb-3">
+                                <label class="form-label">Email</label>
+                                <input class="form-control" :value="user?.email || ''" type="text" disabled />
+                            </div>
+
+                            <div class="mb-3">
+                                <label class="form-label">Status</label>
+                                <input class="form-control" :value="user?.is_active ? 'Active' : 'Inactive'" type="text" disabled />
+                            </div>
+
+                            <div>
+                                <label class="form-label">Groups</label>
+                                <select v-model="groupIds" class="form-select" multiple>
+                                    <option v-for="group in groups" :key="group.id" :value="group.id">
+                                        {{ group.name }}
+                                    </option>
+                                </select>
+                                <div class="small text-muted mt-1">Ctrl/Cmd+Click for multiple groups</div>
+                            </div>
+                        </div>
+                        <div class="modal-footer">
+                            <button type="button" class="btn btn-outline-secondary" @click="emit('close')">Cancel</button>
+                            <button type="submit" class="btn btn-primary" :disabled="submitting">
+                                {{ submitting ? "Saving..." : "Save Changes" }}
+                            </button>
+                        </div>
+                    </form>
+                </div>
+            </div>
+        </div>
+        <div class="modal-backdrop fade show admin-modal-backdrop"></div>
+    </teleport>
+</template>
+
+<script setup>
+import { ref, watch } from "vue";
+
+const props = defineProps({
+    user: {
+        type: Object,
+        default: null,
+    },
+    groups: {
+        type: Array,
+        default: () => [],
+    },
+    submitting: {
+        type: Boolean,
+        default: false,
+    },
+});
+
+const emit = defineEmits(["close", "submit"]);
+
+const groupIds = ref([]);
+
+watch(
+    () => props.user,
+    (user) => {
+        groupIds.value = [...(user?.group_ids || [])];
+    },
+    { immediate: true },
+);
+
+const handleSubmit = () => {
+    emit("submit", { group_ids: groupIds.value });
+};
+</script>
+
+<style scoped>
+.admin-modal {
+    z-index: 2000;
+    overflow-y: auto;
+    padding-top: max(0.5rem, env(safe-area-inset-top));
+}
+
+.admin-modal-backdrop {
+    z-index: 1990;
+}
+
+.admin-modal .modal-dialog {
+    margin: 1rem auto;
+}
+
+@media (max-width: 767.98px) {
+    .admin-modal {
+        padding-top: max(0.75rem, env(safe-area-inset-top));
+    }
+
+    .admin-modal .modal-dialog {
+        margin: 0.75rem;
+        max-width: none;
+    }
+}
+</style>

frontend/src/components/NoteEditor.vue

@@ -2,7 +2,6 @@
     <div class="note-editor">
         <div class="editor-toolbar mb-3">
             <button class="btn btn-sm btn-primary" @click="saveNote">Save</button>
-            <button v-if="canDelete" class="btn btn-sm btn-danger ms-2" @click="confirmDelete">Delete</button>
             <button class="btn btn-sm btn-outline-secondary ms-2" @click="emit('cancel')">Cancel</button>
             <button
                 v-if="fileExplorerEnabled"
@@ -32,7 +31,7 @@
 
                 <div :class="showFileExplorer ? 'col-12 col-md-4 mt-3 mt-md-0' : 'col-12 col-md-6 mt-3 mt-md-0'">
                     <div class="preview-pane border rounded p-3">
-                        <div v-html="renderedMarkdown"></div>
+                        <div class="markdown-body" v-html="renderedMarkdown"></div>
                     </div>
                 </div>
 
@@ -82,17 +81,24 @@
                 </select>
                 <input v-if="passwordAction === 'set'" v-model="notePassword" type="password" class="form-control mt-2" minlength="4" maxlength="128" placeholder="Enter a note password" />
             </div>
+
+            <section v-if="canDelete && editingNote.id" class="danger-zone mt-4" aria-labelledby="danger-zone-title">
+                <h3 id="danger-zone-title" class="danger-zone-title mb-2">Danger Zone</h3>
+                <p class="danger-zone-copy mb-3">Deleting this note is permanent and cannot be undone.</p>
+                <button class="btn btn-danger" type="button" @click="confirmDelete">
+                    <i class="mdi mdi-delete-outline me-1" aria-hidden="true"></i>
+                    Delete Note
+                </button>
+            </section>
         </div>
     </div>
 </template>
 
 <script setup>
 import { ref, computed, watch, onBeforeUnmount, onMounted, nextTick } from "vue";
-import { marked } from "marked";
 import DOMPurify from "dompurify";
 import { useSettingsStore } from "../stores/settingsStore";
-import { useAuthStore } from "../stores/authStore";
+import { renderMarkdown } from "../utils/markdown.js";
-import { preprocessMarkdown } from "../utils/markdown.js";
 import FileExplorer from "./FileExplorer.vue";
 
 const props = defineProps({
@@ -116,7 +122,6 @@ const props = defineProps({
 
 const emit = defineEmits(["save", "delete", "cancel"]);
 const settingsStore = useSettingsStore();
-const authStore = useAuthStore();
 const publicSharingEnabled = ref(true);
 const fileExplorerEnabled = computed(() => settingsStore.fileExplorerEnabled);
 
@@ -132,18 +137,8 @@ const saveState = ref("saved");
 const saveStateTimeout = ref(null);
 
 const renderedMarkdown = computed(() => {
-    const html = marked.parse(preprocessMarkdown(editingNote.value.content || ""));
+    const html = renderMarkdown(editingNote.value.content || "");
-    let clean = DOMPurify.sanitize(html);
+    return DOMPurify.sanitize(html);
-    // Inject access token into space file API URLs so images render without a separate JS fetch
-    const token = authStore.accessToken;
-    if (token && props.spaceId) {
-        clean = clean.replace(/((?:src|href)=["'])([^"']*\/api\/v1\/spaces\/[^"']*\/files\/object[^"']*)(["'])/g, (_, attr, url, quote) => {
-            if (url.includes("token=")) return attr + url + quote;
-            const sep = url.includes("?") ? "&" : "?";
-            return `${attr}${url}${sep}token=${encodeURIComponent(token)}${quote}`;
-        });
-    }
-    return clean;
 });
 
 const saveStatusLabel = computed(() => {
@@ -294,7 +289,7 @@ onMounted(async () => {
 
 .editor-textarea {
     font-family: "Courier New", monospace;
-    min-height: 400px;
+    min-height: 600px;
     resize: vertical;
 }
 
@@ -333,4 +328,22 @@ onMounted(async () => {
     overflow-y: auto;
     max-height: 600px;
 }
+
+.danger-zone {
+    padding: 1rem;
+    border: 1px solid #f3b5b5;
+    border-radius: 0.75rem;
+    background: #fff5f5;
+}
+
+.danger-zone-title {
+    color: #9f1c1c;
+    font-size: 1rem;
+    font-weight: 700;
+}
+
+.danger-zone-copy {
+    color: #7a2727;
+    font-size: 0.9rem;
+}
 </style>

frontend/src/components/NoteViewer.vue

@@ -30,10 +30,8 @@
 
 <script setup>
 import { computed } from "vue";
-import { marked } from "marked";
 import DOMPurify from "dompurify";
-import { useAuthStore } from "../stores/authStore";
+import { renderMarkdown } from "../utils/markdown.js";
-import { preprocessMarkdown } from "../utils/markdown.js";
 
 const props = defineProps({
     note: {
@@ -50,20 +48,9 @@ const props = defineProps({
     },
 });
 
-const authStore = useAuthStore();
-
 const renderedMarkdown = computed(() => {
-    const html = marked.parse(preprocessMarkdown(props.note.content || ""));
+    const html = renderMarkdown(props.note.content || "");
-    let clean = DOMPurify.sanitize(html);
+    return DOMPurify.sanitize(html);
-    const token = authStore.accessToken;
-    if (token && props.spaceId) {
-        clean = clean.replace(/((?:src|href)=["'])([^"']*\/api\/v1\/spaces\/[^"']*\/files\/object[^"']*)(["'])/g, (_, attr, url, quote) => {
-            if (url.includes("token=")) return attr + url + quote;
-            const sep = url.includes("?") ? "&" : "?";
-            return `${attr}${url}${sep}token=${encodeURIComponent(token)}${quote}`;
-        });
-    }
-    return clean;
 });
 
 const categoryLabel = computed(() => {

frontend/src/main.js

@@ -4,6 +4,7 @@ import router from "./router";
 import App from "./App.vue";
 import "bootstrap/dist/css/bootstrap.min.css";
 import "@mdi/font/css/materialdesignicons.min.css";
+import "highlight.js/styles/github-dark.min.css";
 import "./assets/styles/main.css";
 
 const app = createApp(App);

frontend/src/pages/Admin.vue

@@ -1,34 +1,40 @@
 <template>
     <div class="admin-page">
-        <div class="d-flex justify-content-between align-items-start mb-3 flex-wrap gap-2">
+        <div class="admin-topbar d-flex justify-content-between align-items-center mb-0 gap-2">
+            <button class="btn btn-outline-secondary d-md-none" type="button" aria-label="Open admin navigation" @click="showMobileSidebar = true">
+                <i class="mdi mdi-menu" aria-hidden="true"></i>
+            </button>
+            <div class="d-flex align-items-start gap-2">
                 <div>
                     <h2 class="mb-1">Admin Panel</h2>
                     <p class="text-muted mb-0">Manage users, groups, spaces, and identity providers.</p>
                 </div>
+            </div>
             <button class="btn btn-outline-secondary" @click="router.push('/')">Back to Notes</button>
         </div>
 
         <div v-if="error" class="alert alert-danger">{{ error }}</div>
         <div v-if="successMessage" class="alert alert-success">{{ successMessage }}</div>
 
-        <ul class="nav nav-tabs mb-3">
+        <div class="admin-shell">
-            <li class="nav-item">
+            <div v-if="showMobileSidebar" class="admin-sidebar-backdrop" @click="showMobileSidebar = false"></div>
-                <button class="nav-link" :class="{ active: activeTab === 'users' }" @click="activeTab = 'users'">Users</button>
-            </li>
-            <li class="nav-item">
-                <button class="nav-link" :class="{ active: activeTab === 'groups' }" @click="activeTab = 'groups'">Groups</button>
-            </li>
-            <li class="nav-item">
-                <button class="nav-link" :class="{ active: activeTab === 'spaces' }" @click="activeTab = 'spaces'">Spaces</button>
-            </li>
-            <li class="nav-item">
-                <button class="nav-link" :class="{ active: activeTab === 'providers' }" @click="activeTab = 'providers'">Identity Providers</button>
-            </li>
-            <li class="nav-item">
-                <button class="nav-link" :class="{ active: activeTab === 'featureFlags' }" @click="activeTab = 'featureFlags'">Feature Flags</button>
-            </li>
-        </ul>
 
+            <aside class="admin-sidebar" :class="{ open: showMobileSidebar }">
+                <div class="admin-sidebar-inner">
+                    <div class="d-flex justify-content-between align-items-center px-2 py-1 d-md-none">
+                        <h6 class="mb-0">Admin Sections</h6>
+                        <button type="button" class="btn-close" aria-label="Close" @click="showMobileSidebar = false"></button>
+                    </div>
+
+                    <nav class="nav nav-pills flex-column gap-1 admin-nav">
+                        <button v-for="tab in adminTabs" :key="tab.id" class="nav-link text-start" :class="{ active: activeTab === tab.id }" @click="selectTab(tab.id)">
+                            {{ tab.label }}
+                        </button>
+                    </nav>
+                </div>
+            </aside>
+
+            <main class="admin-content">
                 <section v-if="activeTab === 'users'" class="admin-section card border-0 shadow-sm">
                     <div class="card-body">
                         <div class="d-flex justify-content-between align-items-center mb-2">
@@ -38,48 +44,39 @@
 
                         <div v-if="loadingUsers" class="text-muted small">Loading users...</div>
                         <div v-else-if="users.length === 0" class="border rounded p-3 text-muted">No users found.</div>
-                <div v-else class="table-responsive">
+                        <div v-else class="list-group users-list">
-                    <table class="table table-sm table-hover align-middle mb-0">
+                            <div v-for="u in users" :key="u.id" class="list-group-item user-row">
-                        <thead class="table-light">
+                                <div class="user-row-main">
-                            <tr>
+                                    <div class="user-name-line">
-                                <th>Username</th>
+                                        <span class="fw-semibold user-name">{{ u.username }}</span>
-                                <th>Email</th>
-                                <th>Groups</th>
-                                <th>Status</th>
-                                <th>Joined</th>
-                            </tr>
-                        </thead>
-                        <tbody>
-                            <tr v-for="u in users" :key="u.id">
-                                <td>{{ u.username }}</td>
-                                <td class="text-muted small">{{ u.email }}</td>
-                                <td style="min-width: 260px">
-                                    <select
-                                        class="form-select form-select-sm"
-                                        multiple
-                                        :value="u.group_ids || []"
-                                        @change="
-                                            updateUserGroups(
-                                                u.id,
-                                                Array.from($event.target.selectedOptions).map((option) => option.value),
-                                            )
-                                        "
-                                    >
-                                        <option v-for="group in groups" :key="group.id" :value="group.id">
-                                            {{ group.name }}
-                                        </option>
-                                    </select>
-                                    <div class="small text-muted mt-1">Ctrl/Cmd+Click for multiple groups</div>
-                                </td>
-                                <td>
                                         <span class="badge" :class="u.is_active ? 'text-bg-success' : 'text-bg-secondary'">
                                             {{ u.is_active ? "Active" : "Inactive" }}
                                         </span>
-                                </td>
+                                    </div>
-                                <td class="text-muted small">{{ formatDate(u.created_at) }}</td>
+
-                            </tr>
+                                    <div class="user-meta-grid">
-                        </tbody>
+                                        <div class="user-meta-item">
-                    </table>
+                                            <div class="user-meta-label">Email</div>
+                                            <div class="user-meta-value">{{ u.email }}</div>
+                                        </div>
+                                        <div class="user-meta-item">
+                                            <div class="user-meta-label">Joined</div>
+                                            <div class="user-meta-value">{{ formatDate(u.created_at) }}</div>
+                                        </div>
+                                        <div class="user-meta-item user-meta-item-groups">
+                                            <div class="user-meta-label">Groups</div>
+                                            <div class="user-meta-value">{{ getUserGroupSummary(u) }}</div>
+                                        </div>
+                                    </div>
+                                </div>
+
+                                <div class="user-row-actions">
+                                    <div class="d-flex gap-2 user-actions-stack">
+                                        <button class="btn btn-sm btn-outline-primary" @click="openEditUserModal(u)">Edit</button>
+                                        <button class="btn btn-sm btn-outline-danger" @click="deleteUser(u)">Delete</button>
+                                    </div>
+                                </div>
+                            </div>
                         </div>
                     </div>
                 </section>
@@ -106,7 +103,10 @@
                                     <div class="small text-muted">{{ group.description || "No description" }}</div>
                                     <div class="small text-muted">{{ (group.permissions || []).length }} permission{{ (group.permissions || []).length === 1 ? "" : "s" }}</div>
                                 </div>
+                                <div class="d-flex gap-2">
                                     <button class="btn btn-sm btn-outline-primary" @click="openEditGroupModal(group)">Edit</button>
+                                    <button class="btn btn-sm btn-outline-danger" :disabled="group.is_system" @click="deleteGroup(group)">Delete</button>
+                                </div>
                             </div>
                         </div>
                     </div>
@@ -140,77 +140,26 @@
 
                 <section v-if="activeTab === 'providers'" class="admin-section card border-0 shadow-sm">
                     <div class="card-body">
-                <div class="d-flex justify-content-between align-items-center mb-2">
+                        <div class="d-flex justify-content-between align-items-center mb-3">
-                    <h5 class="mb-0">Configured Providers</h5>
+                            <h5 class="mb-0">Identity Providers</h5>
+                            <div class="d-flex gap-2">
                                 <button class="btn btn-sm btn-outline-secondary" :disabled="loadingProviders" @click="loadProviders">Refresh</button>
+                                <button class="btn btn-sm btn-primary" @click="openCreateProviderModal"><i class="mdi mdi-plus me-1" aria-hidden="true"></i>Add Provider</button>
+                            </div>
                         </div>
 
                         <div v-if="loadingProviders" class="text-muted small">Loading providers...</div>
                         <div v-else-if="providers.length === 0" class="border rounded p-3 text-muted">No providers configured yet.</div>
-                <div v-else class="list-group mb-3">
+                        <div v-else class="list-group">
                             <div v-for="provider in providers" :key="provider.id" class="list-group-item d-flex justify-content-between align-items-center">
-                        <div>
+                                <div class="d-flex align-items-center gap-2">
-                            <div class="fw-semibold">{{ provider.name }}</div>
+                                    <span class="fw-semibold">{{ provider.name }}</span>
-                            <div class="small text-muted">{{ provider.type.toUpperCase() }} · {{ provider.scopes.join(", ") }}</div>
-                            <div class="small text-muted">Callback: {{ buildCallbackUrl(provider.id) }}</div>
                                 </div>
-                        <span class="badge" :class="provider.is_active ? 'text-bg-success' : 'text-bg-secondary'">
+                                <div class="d-flex gap-2">
-                            {{ provider.is_active ? "Active" : "Disabled" }}
+                                    <button class="btn btn-sm btn-outline-secondary" @click="openEditProviderModal(provider)">Edit</button>
-                        </span>
                                 </div>
                             </div>
-
-                <h6 class="mb-2">Add Provider</h6>
-                <form class="row g-3" @submit.prevent="createProvider">
-                    <div class="col-md-6">
-                        <label class="form-label">Display Name</label>
-                        <input v-model="providerForm.name" type="text" class="form-control" required />
                         </div>
-                    <div class="col-md-6">
-                        <label class="form-label">Provider Type</label>
-                        <select v-model="providerForm.type" class="form-select">
-                            <option value="oidc">OIDC</option>
-                            <option value="oauth2">OAuth2</option>
-                        </select>
-                    </div>
-                    <div class="col-md-6">
-                        <label class="form-label">Client ID</label>
-                        <input v-model="providerForm.client_id" type="text" class="form-control" required />
-                    </div>
-                    <div class="col-md-6">
-                        <label class="form-label">Client Secret</label>
-                        <input v-model="providerForm.client_secret" type="password" class="form-control" required />
-                    </div>
-                    <div class="col-md-6">
-                        <label class="form-label">Authorization URL</label>
-                        <input v-model="providerForm.authorization_url" type="url" class="form-control" required />
-                    </div>
-                    <div class="col-md-6">
-                        <label class="form-label">Token URL</label>
-                        <input v-model="providerForm.token_url" type="url" class="form-control" required />
-                    </div>
-                    <div class="col-md-6">
-                        <label class="form-label">UserInfo URL</label>
-                        <input v-model="providerForm.userinfo_url" type="url" class="form-control" placeholder="Optional" />
-                    </div>
-                    <div class="col-md-6">
-                        <label class="form-label">ID Token Field</label>
-                        <input v-model="providerForm.id_token_claim" type="text" class="form-control" placeholder="id_token" />
-                    </div>
-                    <div class="col-12">
-                        <label class="form-label">Scopes</label>
-                        <input v-model="providerForm.scopes" type="text" class="form-control" placeholder="openid, profile, email" />
-                    </div>
-                    <div class="col-12 form-check ms-2">
-                        <input id="provider-active" v-model="providerForm.is_active" type="checkbox" class="form-check-input" />
-                        <label for="provider-active" class="form-check-label">Provider is active</label>
-                    </div>
-                    <div class="col-12 d-flex justify-content-end">
-                        <button type="submit" class="btn btn-primary" :disabled="submittingProvider">
-                            {{ submittingProvider ? "Saving..." : "Add Provider" }}
-                        </button>
-                    </div>
-                </form>
                     </div>
                 </section>
 
@@ -305,53 +254,32 @@
                         </div>
                     </div>
                 </section>
+            </main>
+        </div>
     </div>
 
     <AdminSpaceModal v-if="showSpaceModal && selectedSpace" :space="selectedSpace" :users="users" @close="showSpaceModal = false" @saved="onSpaceSaved" @deleted="onSpaceDeleted" />
 
-    <teleport to="body">
+    <AdminGroupModal
-        <div v-if="showGroupModal" class="modal fade show d-block" tabindex="-1" role="dialog" aria-modal="true" @click.self="closeGroupModal">
+        v-if="showGroupModal"
-            <div class="modal-dialog modal-lg modal-dialog-centered" role="document">
+        :mode="groupModalMode"
-                <div class="modal-content">
+        :group="selectedGroup"
-                    <div class="modal-header">
+        :is-system-group="isEditingSystemGroup"
-                        <h5 class="modal-title">{{ groupModalMode === "create" ? "Create Group" : "Edit Group" }}</h5>
+        :submitting="submittingGroupModal"
-                        <button type="button" class="btn-close" aria-label="Close" @click="closeGroupModal"></button>
+        @close="closeGroupModal"
-                    </div>
+        @submit="submitGroupModal"
-                    <form @submit.prevent="submitGroupModal">
+    />
-                        <div class="modal-body">
-                            <div class="mb-3">
-                                <label class="form-label">Group name</label>
-                                <input v-model="groupModalForm.name" class="form-control" type="text" required :disabled="isEditingSystemGroup" />
-                            </div>
 
-                            <div class="mb-3">
+    <AdminUserModal v-if="showUserModal && selectedUser" :user="selectedUser" :groups="groups" :submitting="submittingUserModal" @close="closeUserModal" @submit="submitUserModal" />
-                                <label class="form-label">Description</label>
-                                <input v-model="groupModalForm.description" class="form-control" type="text" :disabled="isEditingSystemGroup" />
-                            </div>
 
-                            <div>
+    <AdminProviderModal
-                                <label class="form-label">Permissions (one per line)</label>
+        v-if="showProviderModal"
-                                <textarea
+        :mode="providerModalMode"
-                                    v-model="groupModalForm.permissionsText"
+        :provider="selectedProvider"
-                                    class="form-control permissions-textarea"
+        :submitting="submittingProviderModal"
-                                    rows="10"
+        @close="closeProviderModal"
-                                    placeholder="space.create&#10;space.project_docs.category.create&#10;space.project_docs.*"
+        @submit="submitProviderModal"
-                                    :disabled="isEditingSystemGroup"
+    />
-                                ></textarea>
-                            </div>
-                        </div>
-                        <div class="modal-footer">
-                            <button type="button" class="btn btn-outline-secondary" @click="closeGroupModal">Cancel</button>
-                            <button v-if="!isEditingSystemGroup" type="submit" class="btn btn-primary" :disabled="submittingGroupModal">
-                                {{ submittingGroupModal ? "Saving..." : groupModalMode === "create" ? "Create Group" : "Save Changes" }}
-                            </button>
-                        </div>
-                    </form>
-                </div>
-            </div>
-        </div>
-        <div v-if="showGroupModal" class="modal-backdrop fade show"></div>
-    </teleport>
 </template>
 
 <script setup>
@@ -359,14 +287,34 @@ import { computed, onMounted, ref } from "vue";
 import { useRouter } from "vue-router";
 import apiClient from "../services/apiClient";
 import AdminSpaceModal from "../components/AdminSpaceModal.vue";
+import AdminGroupModal from "../components/AdminGroupModal.vue";
+import AdminUserModal from "../components/AdminUserModal.vue";
+import AdminProviderModal from "../components/AdminProviderModal.vue";
 
 const router = useRouter();
 const activeTab = ref("users");
+const showMobileSidebar = ref(false);
 const error = ref("");
 const successMessage = ref("");
 
+const adminTabs = [
+    { id: "users", label: "Users" },
+    { id: "groups", label: "Groups" },
+    { id: "spaces", label: "Spaces" },
+    { id: "providers", label: "Identity Providers" },
+    { id: "featureFlags", label: "Feature Flags" },
+];
+
+const selectTab = (tabId) => {
+    activeTab.value = tabId;
+    showMobileSidebar.value = false;
+};
+
 const users = ref([]);
 const loadingUsers = ref(false);
+const showUserModal = ref(false);
+const submittingUserModal = ref(false);
+const selectedUser = ref(null);
 
 const groups = ref([]);
 const loadingGroups = ref(false);
@@ -374,11 +322,7 @@ const showGroupModal = ref(false);
 const groupModalMode = ref("create");
 const editingGroupId = ref("");
 const submittingGroupModal = ref(false);
-const groupModalForm = ref({
+const selectedGroup = ref(null);
-    name: "",
-    description: "",
-    permissionsText: "",
-});
 
 const spaces = ref([]);
 const loadingSpaces = ref(false);
@@ -387,19 +331,10 @@ const selectedSpace = ref(null);
 
 const providers = ref([]);
 const loadingProviders = ref(false);
-const submittingProvider = ref(false);
+const showProviderModal = ref(false);
-const providerForm = ref({
+const providerModalMode = ref("create");
-    name: "",
+const selectedProvider = ref(null);
-    type: "oidc",
+const submittingProviderModal = ref(false);
-    client_id: "",
-    client_secret: "",
-    authorization_url: "",
-    token_url: "",
-    userinfo_url: "",
-    id_token_claim: "id_token",
-    scopes: "openid, profile, email",
-    is_active: true,
-});
 
 const loadingFeatureFlags = ref(false);
 const savingFeatureFlags = ref(false);
@@ -439,8 +374,10 @@ const loadUsers = async () => {
     }
 };
 
-const updateUserGroups = async (userId, groupIds) => {
+const updateUserGroups = async (userId, groupIds, options = {}) => {
+    if (!options.silent) {
         clearMessages();
+    }
     try {
         const response = await apiClient.put(`/api/v1/admin/users/${userId}/groups`, { group_ids: groupIds });
         const updatedUser = response.data;
@@ -448,26 +385,70 @@ const updateUserGroups = async (userId, groupIds) => {
         if (userIndex !== -1) {
             users.value[userIndex] = { ...users.value[userIndex], ...updatedUser };
         }
+        if (!options.silent) {
             successMessage.value = "User groups updated.";
+        }
+        return updatedUser;
     } catch (e) {
         error.value = e.response?.data || "Failed to update user groups.";
+        throw e;
     }
 };
 
-const resetGroupModalForm = () => {
+const getUserGroupSummary = (user) => {
-    groupModalForm.value = {
+    const ids = user?.group_ids || [];
-        name: "",
+    if (!ids.length) {
-        description: "",
+        return "No groups";
-        permissionsText: "",
+    }
-    };
+    const names = ids.map((groupID) => groups.value.find((group) => group.id === groupID)?.name).filter(Boolean);
+    return names.length ? names.join(", ") : "No groups";
+};
+
+const openEditUserModal = (user) => {
+    selectedUser.value = { ...user };
+    showUserModal.value = true;
+};
+
+const closeUserModal = () => {
+    showUserModal.value = false;
+    submittingUserModal.value = false;
+    selectedUser.value = null;
+};
+
+const submitUserModal = async ({ group_ids }) => {
+    submittingUserModal.value = true;
+    clearMessages();
+    try {
+        await updateUserGroups(selectedUser.value.id, group_ids, { silent: true });
+        successMessage.value = "User updated.";
+        closeUserModal();
+    } catch {
+        // error message handled in updateUserGroups
+    } finally {
+        submittingUserModal.value = false;
+    }
+};
+
+const deleteUser = async (user) => {
+    if (!confirm(`Delete user "${user.username}"? This action cannot be undone.`)) {
+        return;
+    }
+
+    clearMessages();
+    try {
+        await apiClient.delete(`/api/v1/admin/users/${user.id}`);
+        users.value = users.value.filter((item) => item.id !== user.id);
+        successMessage.value = `User "${user.username}" deleted.`;
+    } catch (e) {
+        error.value = e.response?.data || "Failed to delete user.";
+    }
 };
 
 const isEditingSystemGroup = computed(() => {
     if (groupModalMode.value !== "edit") {
         return false;
     }
-    const group = groups.value.find((item) => item.id === editingGroupId.value);
+    return !!selectedGroup.value?.is_system;
-    return !!group?.is_system;
 });
 
 const splitPermissionsByNewline = (raw) =>
@@ -479,24 +460,21 @@ const splitPermissionsByNewline = (raw) =>
 const openCreateGroupModal = () => {
     groupModalMode.value = "create";
     editingGroupId.value = "";
-    resetGroupModalForm();
+    selectedGroup.value = null;
     showGroupModal.value = true;
 };
 
 const openEditGroupModal = (group) => {
     groupModalMode.value = "edit";
     editingGroupId.value = group.id;
-    groupModalForm.value = {
+    selectedGroup.value = { ...group };
-        name: group.name || "",
-        description: group.description || "",
-        permissionsText: (group.permissions || []).join("\n"),
-    };
     showGroupModal.value = true;
 };
 
 const closeGroupModal = () => {
     showGroupModal.value = false;
     submittingGroupModal.value = false;
+    selectedGroup.value = null;
 };
 
 const loadGroups = async () => {
@@ -512,14 +490,14 @@ const loadGroups = async () => {
     }
 };
 
-const submitGroupModal = async () => {
+const submitGroupModal = async (formData) => {
     submittingGroupModal.value = true;
     clearMessages();
     try {
         const payload = {
-            name: groupModalForm.value.name,
+            name: formData.name,
-            description: groupModalForm.value.description,
+            description: formData.description,
-            permissions: splitPermissionsByNewline(groupModalForm.value.permissionsText),
+            permissions: splitPermissionsByNewline(formData.permissionsText),
         };
 
         if (groupModalMode.value === "create") {
@@ -531,7 +509,6 @@ const submitGroupModal = async () => {
         }
 
         closeGroupModal();
-        resetGroupModalForm();
         await Promise.all([loadGroups(), loadUsers()]);
     } catch (e) {
         error.value = e.response?.data || `Failed to ${groupModalMode.value === "create" ? "create" : "update"} group.`;
@@ -540,6 +517,24 @@ const submitGroupModal = async () => {
     }
 };
 
+const deleteGroup = async (group) => {
+    if (group.is_system) {
+        return;
+    }
+    if (!confirm(`Delete group "${group.name}"? This action cannot be undone.`)) {
+        return;
+    }
+
+    clearMessages();
+    try {
+        await apiClient.delete(`/api/v1/admin/groups/${group.id}`);
+        successMessage.value = `Group "${group.name}" deleted.`;
+        await Promise.all([loadGroups(), loadUsers()]);
+    } catch (e) {
+        error.value = e.response?.data || "Failed to delete group.";
+    }
+};
+
 const loadSpaces = async () => {
     loadingSpaces.value = true;
     clearMessages();
@@ -574,21 +569,43 @@ const onSpaceDeleted = (deletedSpace) => {
     successMessage.value = `Space "${deletedSpace.name}" deleted.`;
 };
 
-const buildCallbackUrl = (providerId) => `${apiClient.defaults.baseURL}/api/v1/auth/providers/${providerId}/callback`;
+const openCreateProviderModal = () => {
+    providerModalMode.value = "create";
+    selectedProvider.value = null;
+    showProviderModal.value = true;
+};
 
-const resetProviderForm = () => {
+const openEditProviderModal = (provider) => {
-    providerForm.value = {
+    providerModalMode.value = "edit";
-        name: "",
+    selectedProvider.value = { ...provider };
-        type: "oidc",
+    showProviderModal.value = true;
-        client_id: "",
+};
-        client_secret: "",
+
-        authorization_url: "",
+const closeProviderModal = () => {
-        token_url: "",
+    showProviderModal.value = false;
-        userinfo_url: "",
+    submittingProviderModal.value = false;
-        id_token_claim: "id_token",
+    selectedProvider.value = null;
-        scopes: "openid, profile, email",
+};
-        is_active: true,
+
-    };
+const submitProviderModal = async (formData) => {
+    submittingProviderModal.value = true;
+    clearMessages();
+    try {
+        if (providerModalMode.value === "create") {
+            await apiClient.post("/api/v1/admin/auth/providers", formData);
+            successMessage.value = "Provider added.";
+        } else {
+            await apiClient.put(`/api/v1/admin/auth/providers/${selectedProvider.value.id}`, formData);
+            successMessage.value = "Provider updated.";
+        }
+
+        closeProviderModal();
+        await loadProviders();
+    } catch (e) {
+        error.value = e.response?.data || `Failed to ${providerModalMode.value === "create" ? "create" : "update"} provider.`;
+    } finally {
+        submittingProviderModal.value = false;
+    }
 };
 
 const loadProviders = async () => {
@@ -604,24 +621,18 @@ const loadProviders = async () => {
     }
 };
 
-const createProvider = async () => {
+const deleteProvider = async (provider) => {
-    submittingProvider.value = true;
+    if (!confirm(`Delete identity provider "${provider.name}"? This action cannot be undone.`)) {
+        return;
+    }
+
     clearMessages();
     try {
-        await apiClient.post("/api/v1/admin/auth/providers", {
+        await apiClient.delete(`/api/v1/admin/auth/providers/${provider.id}`);
-            ...providerForm.value,
+        providers.value = providers.value.filter((item) => item.id !== provider.id);
-            scopes: providerForm.value.scopes
+        successMessage.value = `Provider "${provider.name}" deleted.`;
-                .split(",")
-                .map((scope) => scope.trim())
-                .filter(Boolean),
-        });
-        successMessage.value = "Provider added.";
-        resetProviderForm();
-        await loadProviders();
     } catch (e) {
-        error.value = e.response?.data || "Failed to create provider.";
+        error.value = e.response?.data || "Failed to delete provider.";
-    } finally {
-        submittingProvider.value = false;
     }
 };
 
@@ -691,15 +702,203 @@ onMounted(async () => {
 
 <style scoped>
 .admin-page {
-    max-width: 1100px;
+    width: 100%;
-    margin: 0 auto;
+    max-width: none;
+    margin: 0;
+    padding: 0;
+    display: flex;
+    flex-direction: column;
+    flex: 1;
+    min-height: 0;
+    overflow: hidden;
+}
+
+.admin-topbar {
+    flex-wrap: wrap;
+    padding: 1rem;
+    border-bottom: 1px solid #dee2e6;
+}
+
+.admin-shell {
+    display: flex;
+    flex: 1;
+    min-height: 0;
+    gap: 0;
+    overflow: hidden;
+}
+
+.admin-sidebar {
+    width: 280px;
+    flex-shrink: 0;
+    background: #f8f9fa;
+    border-right: 1px solid #dee2e6;
+}
+
+.admin-sidebar-inner {
+    padding: 0.75rem;
+}
+
+.admin-nav .nav-link {
+    border-radius: 0.6rem;
+    color: #495057;
+    font-weight: 500;
+}
+
+.admin-nav .nav-link:hover {
+    background: #eef2f7;
+    color: #212529;
+}
+
+.admin-nav .nav-link.active {
+    background: #212529;
+    color: #fff;
+}
+
+.admin-content {
+    flex: 1;
+    min-width: 0;
+    min-height: 0;
+    overflow-y: auto;
+    padding: 1rem;
 }
 
 .admin-section {
     border-radius: 12px;
 }
 
-.permissions-textarea {
+.users-list .list-group-item {
-    font-family: "Courier New", monospace;
+    padding: 1rem;
+}
+
+.user-row {
+    display: flex;
+    gap: 1rem;
+    align-items: center;
+    justify-content: space-between;
+}
+
+.user-row-main {
+    flex: 1;
+    min-width: 0;
+}
+
+.user-row-actions {
+    flex-shrink: 0;
+}
+
+.user-actions-stack {
+    flex-wrap: wrap;
+    justify-content: flex-end;
+}
+
+.user-name-line {
+    display: flex;
+    align-items: center;
+    gap: 0.5rem;
+    margin-bottom: 0.6rem;
+}
+
+.user-name {
+    font-size: 1.1rem;
+}
+
+.user-meta-grid {
+    display: grid;
+    grid-template-columns: repeat(3, minmax(0, 1fr));
+    gap: 0.75rem 1.25rem;
+}
+
+.user-meta-label {
+    font-size: 0.75rem;
+    text-transform: uppercase;
+    letter-spacing: 0.04em;
+    color: #6c757d;
+    margin-bottom: 0.1rem;
+}
+
+.user-meta-value {
+    color: #495057;
+    overflow-wrap: anywhere;
+}
+
+.user-meta-item-groups {
+    grid-column: span 1;
+}
+
+@media (max-width: 991.98px) {
+    .user-meta-grid {
+        grid-template-columns: repeat(2, minmax(0, 1fr));
+    }
+
+    .user-meta-item-groups {
+        grid-column: 1 / -1;
+    }
+}
+
+@media (max-width: 767.98px) {
+    .admin-shell {
+        display: block;
+        min-height: auto;
+    }
+
+    .admin-topbar {
+        padding: 0.75rem;
+    }
+
+    .admin-content {
+        padding: 0.75rem;
+    }
+
+    .admin-sidebar-backdrop {
+        position: fixed;
+        left: 0;
+        right: 0;
+        top: 0;
+        bottom: 0;
+        background: rgba(0, 0, 0, 0.45);
+        z-index: 1400;
+    }
+
+    .admin-sidebar {
+        position: fixed;
+        top: 0;
+        left: 0;
+        bottom: 0;
+        width: min(82vw, 320px);
+        z-index: 1410;
+        transform: translateX(-100%);
+        transition: transform 0.25s ease;
+        border-right: 1px solid #dee2e6;
+    }
+
+    .admin-sidebar-inner {
+        padding: 0.75rem;
+    }
+
+    .admin-sidebar.open {
+        transform: translateX(0);
+    }
+
+    .user-row {
+        flex-direction: column;
+        align-items: stretch;
+    }
+
+    .user-row-actions {
+        width: 100%;
+    }
+
+    .user-row-actions .btn {
+        width: 100%;
+    }
+
+    .user-actions-stack {
+        flex-direction: column;
+    }
+
+    .user-meta-grid {
+        grid-template-columns: 1fr;
+        gap: 0.65rem;
+    }
 }
 </style>

frontend/src/pages/Login.vue

@@ -88,73 +88,33 @@ const startProviderLogin = (providerId) => {
     window.location.href = `${apiClient.defaults.baseURL}/api/v1/auth/providers/${providerId}/start`;
 };
 
-const decodeBase64Url = (value) => {
-    const normalized = value.replace(/-/g, "+").replace(/_/g, "/");
-    const padding = normalized.length % 4;
-    const padded = padding === 0 ? normalized : `${normalized}${"=".repeat(4 - padding)}`;
-    return atob(padded);
-};
-
-const decodeBase64UrlUTF8 = (value) => {
-    const binary = decodeBase64Url(value);
-    const bytes = Uint8Array.from(binary, (ch) => ch.charCodeAt(0));
-    return new TextDecoder().decode(bytes);
-};
-
-const readUserFromQuery = (params) => {
-    const plainUserJSON = params.get("user_json");
-    if (plainUserJSON) {
-        return JSON.parse(plainUserJSON);
-    }
-
-    const encodedUser = params.get("user");
-    if (encodedUser) {
-        return JSON.parse(decodeBase64UrlUTF8(encodedUser));
-    }
-
-    return null;
-};
-
 const completeOAuthRedirect = async () => {
     const params = new URLSearchParams(window.location.search);
     const status = params.get("status");
-    const accessToken = params.get("access_token") || params.get("accessToken") || params.get("token");
 
     if (status === "oauth_error") {
         error.value = params.get("message") || "Provider sign-in failed.";
         return true;
     }
 
-    // Accept callback payloads even when `status` is missing.
+    if (status !== "oauth_success") {
-    if (status !== "oauth_success" && !accessToken) {
-        if (status === "oauth_error") {
-            error.value = params.get("message") || "Provider sign-in failed.";
-        }
         return false;
     }
 
-    if (!accessToken) {
-        error.value = "Provider sign-in returned an incomplete session.";
-        return true;
-    }
-
     try {
-        const user = readUserFromQuery(params);
+        await authStore.ensureInitialized();
-        if (!user) {
-            error.value = "Provider sign-in returned an incomplete session.";
-            return true;
-        }
-
-        authStore.setSession({ access_token: accessToken, user });
-        await router.replace("/");
     } catch {
-        error.value = "Unable to restore the provider session.";
+        error.value = "Unable to restore provider session.";
+        return true;
     }
 
     if (authStore.isAuthenticated) {
-        window.location.replace("/");
+        await router.replace("/");
+        return true;
     }
 
+    error.value = "Provider sign-in returned an incomplete session.";
+
     return true;
 };
 
@@ -163,6 +123,8 @@ onMounted(async () => {
     registrationEnabled.value = !!flags.registration_enabled;
     providerLoginEnabled.value = !!flags.provider_login_enabled;
 
+    await authStore.ensureInitialized();
+
     if (authStore.isAuthenticated) {
         await router.replace("/");
         return;

frontend/src/router/index.js

@@ -4,39 +4,6 @@ import { useSettingsStore } from "../stores/settingsStore";
 import LoginPage from "../pages/Login.vue";
 import RegisterPage from "../pages/Register.vue";
 
-const decodeBase64UrlUTF8 = (value) => {
-    const normalized = value.replace(/-/g, "+").replace(/_/g, "/");
-    const padding = normalized.length % 4;
-    const padded = padding === 0 ? normalized : `${normalized}${"=".repeat(4 - padding)}`;
-    const binary = atob(padded);
-    const bytes = Uint8Array.from(binary, (ch) => ch.charCodeAt(0));
-    return new TextDecoder().decode(bytes);
-};
-const restoreOAuthSessionFromQuery = (query, authStore) => {
-    // Merge router query with URLSearchParams for full coverage
-    const params = new URLSearchParams(window.location.search);
-    const accessToken = query.access_token || query.accessToken || query.token || params.get("access_token") || params.get("accessToken") || params.get("token");
-
-    if (!accessToken) {
-        return false;
-    }
-
-    try {
-        const plainUserJSON = query.user_json || params.get("user_json");
-        const encodedUser = query.user || params.get("user");
-        const user = plainUserJSON ? JSON.parse(plainUserJSON) : encodedUser ? JSON.parse(decodeBase64UrlUTF8(encodedUser)) : null;
-
-        if (!user) {
-            return false;
-        }
-
-        authStore.setSession({ access_token: accessToken, user });
-        return true;
-    } catch {
-        return false;
-    }
-};
-
 const routes = [
     {
         path: "/login",
@@ -81,25 +48,7 @@ router.beforeEach(async (to, from, next) => {
     const authStore = useAuthStore();
     const settingsStore = useSettingsStore();
 
-    // Only attempt OAuth callback restoration if actual OAuth query params are present
+    await authStore.ensureInitialized();
-    const params = new URLSearchParams(window.location.search);
-    const hasOAuthParams = to.query.access_token || to.query.accessToken || to.query.token || params.get("access_token") || params.get("accessToken") || params.get("token");
-
-    if (to.path === "/login") {
-        if (hasOAuthParams) {
-            const restored = restoreOAuthSessionFromQuery(to.query, authStore);
-            if (restored) {
-                next({ path: "/", replace: true });
-                return;
-            }
-        }
-
-        // Allow login page to be viewed regardless of auth state if no OAuth callback
-        if (!hasOAuthParams) {
-            next();
-            return;
-        }
-    }
 
     if (to.path === "/register") {
         await settingsStore.loadFeatureFlags();

frontend/src/services/apiClient.js

@@ -3,23 +3,57 @@ import { useAuthStore } from "../stores/authStore";
 
 const apiClient = axios.create({
     baseURL: import.meta.env.VITE_API_BASE_URL || "http://localhost:8080",
+    withCredentials: true,
 });
 
-apiClient.interceptors.request.use((config) => {
+let isRefreshing = false;
-    const authStore = useAuthStore();
+let refreshSubscribers = [];
-    if (authStore.accessToken) {
+
-        config.headers.Authorization = `Bearer ${authStore.accessToken}`;
+function onRefreshed() {
-    }
+    refreshSubscribers.forEach((cb) => cb());
-    return config;
+    refreshSubscribers = [];
-});
+}
 
 apiClient.interceptors.response.use(
     (response) => response,
-    (error) => {
+    async (error) => {
-        if (error.response?.status === 401) {
+        const originalRequest = error.config;
+
+        if (error.response?.status === 401 && !originalRequest._retry) {
+            // Avoid retrying the refresh request itself
+            if (originalRequest.url?.includes("/auth/refresh") || originalRequest.url?.includes("/auth/login")) {
                 const authStore = useAuthStore();
-            authStore.logout();
+                authStore.clearSession();
+                return Promise.reject(error);
             }
+
+            if (isRefreshing) {
+                // Queue the request until the ongoing refresh completes
+                return new Promise((resolve, reject) => {
+                    refreshSubscribers.push(() => {
+                        originalRequest._retry = true;
+                        apiClient(originalRequest).then(resolve).catch(reject);
+                    });
+                });
+            }
+
+            originalRequest._retry = true;
+            isRefreshing = true;
+
+            try {
+                await apiClient.post("/api/v1/auth/refresh");
+                onRefreshed();
+                return apiClient(originalRequest);
+            } catch {
+                refreshSubscribers = [];
+                const authStore = useAuthStore();
+                authStore.clearSession();
+                return Promise.reject(error);
+            } finally {
+                isRefreshing = false;
+            }
+        }
+
         return Promise.reject(error);
     },
 );

frontend/src/stores/authStore.js

@@ -3,10 +3,11 @@ import { ref, computed } from "vue";
 import apiClient from "../services/apiClient";
 
 export const useAuthStore = defineStore("auth", () => {
-    const storedUser = localStorage.getItem("user");
+    const user = ref(null);
-    const user = ref(storedUser ? JSON.parse(storedUser) : null);
+    const initialized = ref(false);
-    const accessToken = ref(localStorage.getItem("accessToken"));
+    let initPromise = null;
-    const isAuthenticated = computed(() => !!accessToken.value && !!user.value);
+
+    const isAuthenticated = computed(() => !!user.value);
     const isAdmin = computed(() => hasPermission("*") || hasPermission("admin.access"));
 
     const normalizePermission = (permission) => (permission || "").trim().toLowerCase();
@@ -46,10 +47,36 @@ export const useAuthStore = defineStore("auth", () => {
     };
 
     const setSession = (responseData) => {
-        accessToken.value = responseData.access_token;
+        user.value = responseData?.user || null;
-        user.value = responseData.user;
+        initialized.value = true;
-        localStorage.setItem("accessToken", accessToken.value);
+    };
-        localStorage.setItem("user", JSON.stringify(user.value));
+
+    const clearSession = () => {
+        user.value = null;
+        initialized.value = true;
+    };
+
+    const loadSession = async () => {
+        try {
+            const response = await apiClient.get("/api/v1/auth/me");
+            user.value = response.data?.user || null;
+        } catch {
+            user.value = null;
+        } finally {
+            initialized.value = true;
+        }
+    };
+
+    const ensureInitialized = async () => {
+        if (initialized.value) {
+            return;
+        }
+        if (!initPromise) {
+            initPromise = loadSession().finally(() => {
+                initPromise = null;
+            });
+        }
+        await initPromise;
     };
 
     const register = async (email, username, password, firstName = "", lastName = "") => {
@@ -87,20 +114,20 @@ export const useAuthStore = defineStore("auth", () => {
     };
 
     const logout = () => {
-        accessToken.value = null;
+        apiClient.post("/api/v1/auth/logout").catch(() => {});
-        user.value = null;
+        clearSession();
-        localStorage.removeItem("accessToken");
-        localStorage.removeItem("user");
     };
 
     return {
         user,
-        accessToken,
+        initialized,
         isAuthenticated,
         isAdmin,
         hasPermission,
         hasSpacePermission,
         setSession,
+        clearSession,
+        ensureInitialized,
         register,
         login,
         logout,

frontend/src/utils/markdown.js

@@ -1,3 +1,19 @@
+import { marked } from "marked";
+import { markedHighlight } from "marked-highlight";
+import hljs from "highlight.js/lib/common";
+
+marked.use(
+    markedHighlight({
+        langPrefix: "hljs language-",
+        highlight(code, lang) {
+            if (lang && hljs.getLanguage(lang)) {
+                return hljs.highlight(code, { language: lang }).value;
+            }
+            return hljs.highlightAuto(code).value;
+        },
+    }),
+);
+
 /**
  * Preprocesses markdown content to support extended image size syntax:
  *
@@ -15,15 +31,16 @@
  */
 export function preprocessMarkdown(content) {
     if (!content) return content;
-    return content.replace(
+    return content.replace(/!\[([^\]]*)\]\(([^\s)"]+)(?:\s+"([^"]*)")?\s+=(\d*%?)[xX](\d*%?)\)/gi, (_, alt, url, title, w, h) => {
-        /!\[([^\]]*)\]\(([^\s)"]+)(?:\s+"([^"]*)")?\s+=(\d*%?)[xX](\d*%?)\)/gi,
-        (_, alt, url, title, w, h) => {
         const safeAlt = alt.replace(/"/g, """);
         let attrs = `src="${url}" alt="${safeAlt}"`;
         if (title) attrs += ` title="${title.replace(/"/g, """)}"`;
         if (w) attrs += ` width="${w}"`;
         if (h) attrs += ` height="${h}"`;
         return `<img ${attrs}>`;
-        },
+    });
-    );
+}
+
+export function renderMarkdown(content) {
+    return marked.parse(preprocessMarkdown(content || ""), { gfm: true });
 }