fix(web): stop long tokens and button rows overflowing on mobile

Three root causes behind five reported overflows:

- Td below sm is a flex row, and a flex item's default min-width:auto is
  its min-content width. A fingerprint or target URL is one unbreakable
  token, so the value could not shrink and spilled out of the card. The
  value now sits in a min-w-0 break-words wrapper that is display:contents
  above sm, leaving the desktop table untouched. Fixes /keys, /monitors
  and the installed-keys table on /servers/[id] in one place.

- The ESO read URL and the secrets group endpoint are unbreakable tokens
  in prose with the default overflow-wrap:normal. Both paragraphs now
  break-words.

- Three page headers (servers/[id], keys/[id], monitors/[id]) held an
  unwrapped button row. They stack below sm and the clusters wrap. These
  used items-start, which is why the earlier responsive sweep — matching
  items-center — skipped all three; only one was reported.

Verified: tsc clean, next build clean, and the compiled stylesheet confirms
max-sm:min-w-0 / max-sm:break-words land in the below-640px query and
sm:contents in the above-640px one.

web/app/(app)/keys/[id]/page.tsx

@@ -248,20 +248,22 @@ export default function KeyDetailPage() {
         />
       )}
 
-      <div className="mb-6 flex items-start justify-between">
-        <div>
+      <div className="mb-6 flex flex-col gap-4 sm:flex-row sm:items-start sm:justify-between">
+        <div className="min-w-0">
           <Link href="/keys" className="text-text-secondary hover:text-text-primary text-sm">
             ← SSH Keys
           </Link>
-          <div className="mt-2 flex items-center gap-3">
+          <div className="mt-2 flex flex-wrap items-center gap-3">
             <h1 className="text-2xl font-bold text-text-primary">{key.label}</h1>
             <Badge variant={key.source === "generated" ? "accent" : "neutral"}>
               {key.source}
             </Badge>
           </div>
-          <p className="mt-1 font-mono text-xs text-text-secondary">{key.fingerprint}</p>
+          {/* A fingerprint is one unbreakable token; without break-all it
+              overflows the column rather than wrapping. */}
+          <p className="mt-1 break-all font-mono text-xs text-text-secondary">{key.fingerprint}</p>
         </div>
-        <div className="flex gap-2">
+        <div className="flex flex-wrap gap-2">
           <Button variant="secondary" onClick={() => setShowAssign(true)}>
             <svg className="h-4 w-4" fill="none" viewBox="0 0 24 24" stroke="currentColor" strokeWidth={2}>
               <path strokeLinecap="round" strokeLinejoin="round" d="M12 4.5v15m7.5-7.5h-15" />

web/app/(app)/monitors/[id]/page.tsx

@@ -97,12 +97,12 @@ export default function MonitorDetailPage() {
 
     return (
         <div className="p-4 sm:p-6 lg:p-8">
-            <div className="mb-6 flex items-start justify-between">
-                <div>
+            <div className="mb-6 flex flex-col gap-4 sm:flex-row sm:items-start sm:justify-between">
+                <div className="min-w-0">
                     <Link href="/monitors" className="text-sm text-text-secondary hover:text-text-primary">
                         ← Monitors
                     </Link>
-                    <div className="mt-2 flex items-center gap-3">
+                    <div className="mt-2 flex flex-wrap items-center gap-3">
                         <h1 className="text-2xl font-bold text-text-primary">{monitor.name}</h1>
                         <Badge variant={statusVariant(monitor.state.status)}>{monitor.state.status}</Badge>
                         <Badge variant="neutral">{monitor.type}</Badge>
@@ -110,7 +110,7 @@ export default function MonitorDetailPage() {
                     </div>
                     {monitor.state.message && <p className="mt-1 text-sm text-text-secondary">{monitor.state.message}</p>}
                 </div>
-                <div className="flex gap-2">
+                <div className="flex flex-wrap gap-2">
                     <Link href={`/monitors/${monitorId}/edit`}>
                         <Button variant="secondary">Edit</Button>
                     </Link>

web/app/(app)/secrets/[group]/page.tsx

@@ -249,13 +249,13 @@ export default function SecretGroupPage() {
             </Link>
 
             <div className="mb-6 flex flex-col gap-3 sm:flex-row sm:items-center sm:justify-between">
-                <div>
-                    <h1 className="font-mono text-2xl font-bold text-text-primary">{group}</h1>
-                    <p className="mt-1 text-sm text-text-secondary">
+                <div className="min-w-0">
+                    <h1 className="break-all font-mono text-2xl font-bold text-text-primary">{group}</h1>
+                    <p className="mt-1 break-words text-sm text-text-secondary">
                         ESO reads this group at <span className="font-mono">GET /api/secrets/{group}/values</span>
                     </p>
                 </div>
-                <div className="flex items-center gap-3">
+                <div className="flex flex-wrap items-center gap-3">
                     <Button variant="ghost" onClick={() => setShowYaml(true)}>
                         <svg className="h-4 w-4" fill="none" viewBox="0 0 24 24" stroke="currentColor" strokeWidth={1.5}>
                             <path strokeLinecap="round" strokeLinejoin="round" d="M17.25 6.75L22.5 12l-5.25 5.25m-10.5 0L1.5 12l5.25-5.25m7.5-3l-4.5 16.5" />

web/app/(app)/servers/[id]/page.tsx

@@ -385,7 +385,7 @@ export default function ServerDetailPage() {
                 <UpdatesModal updates={server.available_updates} onClose={() => setShowUpdatesModal(false)} onApply={() => applyUpdates()} isApplying={isApplying} applySuccess={applySuccess} />
             )}
 
-            <div className="mb-6 flex items-start justify-between">
+            <div className="mb-6 flex flex-col gap-4 sm:flex-row sm:items-start sm:justify-between">
                 <div>
                     <div className="flex items-center gap-3">
                         <Link href="/servers" className="text-text-secondary hover:text-text-primary text-sm">
@@ -398,7 +398,7 @@ export default function ServerDetailPage() {
                     </div>
                     <p className="mt-1 font-mono text-sm text-text-secondary">{server.ip_address}</p>
                 </div>
-                <div className="flex gap-2">
+                <div className="flex flex-wrap gap-2">
                     {/* Rendered disabled rather than hidden when the licence does not
                         include the console: a customer cannot buy what they cannot see,
                         and a feature that vanishes reads as a bug. */}

web/app/(app)/settings/page.tsx

@@ -86,7 +86,9 @@ function SecretsTokenCard({ tokenSet, rotatedAt }: { tokenSet: boolean; rotatedA
 
     return (
         <SectionCard title="Secrets read token (ESO)" description="Kubernetes External Secrets Operator authenticates to the read endpoint with this bearer token." icon={<KeyIcon />}>
-            <p className="mb-4 text-sm text-text-secondary">
+            {/* break-words, not the default: the read URL is one unbreakable
+                token, so on a narrow card it overflows rather than wrapping. */}
+            <p className="mb-4 break-words text-sm text-text-secondary">
                 Point your <span className="font-mono">ClusterSecretStore</span> at <span className="font-mono text-text-primary">{readUrl}</span>.
             </p>