docs: add DEFERRED.md to track skipped refactoring work

Author: DevanshuNEU

DEFERRED.md

@@ -0,0 +1,36 @@
+# Deferred Work
+
+Items intentionally skipped for future PRs.
+
+---
+
+## PR: feature/docs-overhaul
+
+### 1. Extract shared EndpointHeader component
+**Priority:** Low
+**Effort:** 30 min
+**Files affected:**
+- `frontend/src/pages/api/APIRepositoriesPage.tsx`
+- `frontend/src/pages/api/APIAnalysisPage.tsx`
+- `frontend/src/pages/api/APISearchPage.tsx`
+- `frontend/src/pages/api/APIOverviewPage.tsx`
+
+**What:** All 4 API doc pages duplicate the endpoint header markup (colored method badge + path in bordered container). APIRepositoriesPage already has a local `EndpointHeader` component - extract it to `@/components/docs` and reuse.
+
+**Saves:** ~40 lines of duplication
+
+**When to do:** Next time any of these pages need changes, or during a cleanup sprint.
+
+---
+
+### 2. Consolidate navigation data source
+**Priority:** Medium  
+**Effort:** 1-2 hours
+**Files affected:**
+- `frontend/src/components/docs/DocsSidebar.tsx` (navigation)
+- `frontend/src/components/docs/DocsSearch.tsx` (docsPages)
+- `frontend/src/components/docs/DocsLayout.tsx` (mobileNavigation)
+
+**What:** Same page list maintained in 3 places. Adding a page requires updating all 3. Extract single `docsNavigation` data source and derive variants from it.
+
+**When to do:** Before adding more doc pages, or if someone forgets to update all 3.