feat(web): FE overhaul — SWR centralized data layer + dashboard + islands

- Add SWR foundation (lib/fetcher, lib/swr, lib/api) with typed
  hooks: useSections/useDocuments/useSearch/useRelated/useRevisions/useQueueStatus
- Replace ad-hoc useEffect+fetch in Header/Sidebar/CommandMenu/search
  with SWR (dedup 4s, focus throttle 10s, debounced search 180ms)
- Doc page: RelatedGrid + RevisionList as SWR client islands (RSC hero stays)
- DocForm: SWR mutate on create/update for live sidebar invalidation
- New APIs: /api/related, /api/revisions, /api/tags, /api/queue/status,
  /api/docs filtering (?section=&status=)
- New UI: DocumentCard, SectionCard, SearchBar, TagCloud, QueueBadge,
  EmptyState, dashboard (/dashboard with QueueStrip live + section stats)
- Layout wraps SWRProvider; no TanStack code (SWR-only per spec)
- Verified: next build passes (16.3.4 Turbopack), no manual fetch sprawl remains

Co-Authored-By: internal-model

apps/web/package.json

@@ -12,6 +12,8 @@
   "dependencies": {
     "@mcpedia/config": "workspace:*",
     "@mcpedia/core": "workspace:*",
+    "@mcpedia/queue": "workspace:*",
+    "@mcpedia/types": "workspace:*",
     "@tailwindcss/typography": "^0.5.20",
     "github-slugger": "^2.0.0",
     "lucide-react": "^1.33.0",
@@ -21,7 +23,8 @@
     "react-markdown": "^9.0.0",
     "rehype-highlight": "^7.0.2",
     "rehype-slug": "^6.0.0",
-    "remark-gfm": "^4.0.1"
+    "remark-gfm": "^4.0.1",
+    "swr": "^2.5.1"
   },
   "devDependencies": {
     "@tailwindcss/postcss": "^4",