docs(06-chat-ui-redesign): create phase 6 plans

.planning/ROADMAP.md

@@ -93,6 +93,24 @@ Plans:
 - [x] `05-03-PLAN.md` - Add validation UI and recovery experience.
 **UI hint**: yes
 
+### Phase 6: Chat UI Redesign (Manus AI System Design)
+**Goal**: Redesign the chat UI to follow Manus AI system design with correct color tokens, component decomposition, and UX patterns.
+**Depends on**: Phase 5
+**Requirements**: UI-01, UI-02, UI-03
+**Success Criteria** (what must be TRUE):
+  1. Model selector lives inside the chat input pill (hero and regular), not the sidebar.
+  2. scan_models returns only top-level GGUF files (no subdirectory traversal).
+  3. Thinking indicator is a single pulsing blue dot + "Thinking" text.
+  4. Send button uses PaperPlaneRight icon only.
+  5. App uses Manus color tokens (#171717 base, #1E1E1E surface, #262626 elevated).
+  6. Settings page aligns to Manus design tokens.
+**Plans**: 3 plans
+Plans:
+- [ ] `06-01-PLAN.md` — Backend scan fix + ModelSelectorPill + Sidebar cleanup + ChatView wiring
+- [ ] `06-02-PLAN.md` — Global Manus tokens + thinking indicator + send button + message widths
+- [ ] `06-03-PLAN.md` — Settings page Manus token alignment
+**UI hint**: yes
+
 ## Progress
 
 | Phase | Plans Complete | Status | Completed |
@@ -102,3 +120,4 @@ Plans:
 | 3. Unified Runtime Workspace | 3/3 | Complete   | 2026-03-29 |
 | 4. Hugging Face Download Engine | 3/3 | Complete | 2026-03-31 |
 | 5. Model Source Validation | 3/3 | Planned | - |
+| 6. Chat UI Redesign | 0/3 | Planned | - |