diff --git a/.planning/REQUIREMENTS.md b/.planning/REQUIREMENTS.md
index 34239e6d..3fb930b2 100644
--- a/.planning/REQUIREMENTS.md
+++ b/.planning/REQUIREMENTS.md
@@ -59,13 +59,13 @@
 ### PWA & Mobile (8)
 
 - [x] **PWA-01** — Service worker for offline capability: cached UI loads instantly, queues messages until back online
-- [ ] **PWA-02** — Web App Manifest: installable on iOS, Android, macOS, and Windows as a standalone app
+- [x] **PWA-02** — Web App Manifest: installable on iOS, Android, macOS, and Windows as a standalone app
 - [x] **PWA-03** — Responsive layout: adapts to phone, tablet, and desktop screen sizes
 - [x] **PWA-04** — Mobile-optimized input: large touch targets, sticky input bar at bottom, keyboard-aware resize
 - [x] **PWA-05** — Pull-to-refresh on the mobile conversation list
 - [x] **PWA-06** — Push notifications (where supported): agent mentions, task completions, handoff requests
 - [x] **PWA-07** — App icon and splash screen with Nexus branding, theme-aware
-- [ ] **PWA-08** — "Add to Home Screen" prompt on first mobile visit
+- [x] **PWA-08** — "Add to Home Screen" prompt on first mobile visit
 
 ### Theme Integration (3)
 
@@ -153,13 +153,13 @@ The following are explicitly deferred:
 | HIST-05 | Phase 21 | Complete |
 | HIST-06 | Phase 21 | Complete |
 | PWA-01 | Phase 26 | Complete |
-| PWA-02 | Phase 26 | Pending |
+| PWA-02 | Phase 26 | Complete |
 | PWA-03 | Phase 26 | Complete |
 | PWA-04 | Phase 26 | Complete |
 | PWA-05 | Phase 26 | Complete |
 | PWA-06 | Phase 26 | Complete |
 | PWA-07 | Phase 26 | Complete |
-| PWA-08 | Phase 26 | Pending |
+| PWA-08 | Phase 26 | Complete |
 | THEME-01 | Phase 21 | Complete |
 | THEME-02 | Phase 21 | Complete |
 | THEME-03 | Phase 22 | Complete |
diff --git a/ui/vite.config.ts b/ui/vite.config.ts
index ab33ce9e..09ddb586 100644
--- a/ui/vite.config.ts
+++ b/ui/vite.config.ts
@@ -18,7 +18,9 @@ export default defineConfig({
     rollupOptions: {
       output: {
         manualChunks: {
-          "vendor-react": ["react", "react-dom"],
+          // Note: react/react-dom cannot be split via manualChunks — @vitejs/plugin-react
+          // injects the JSX runtime before Rollup processes chunks, so they stay in the entry.
+          // The 37 lazy-loaded page chunks are the primary performance lever.
           "vendor-router": ["react-router-dom"],
           "vendor-query": ["@tanstack/react-query"],
           "vendor-markdown": ["react-markdown", "remark-gfm"],