docs(04): create phase plan

.planning/ROADMAP.md

@@ -75,7 +75,11 @@ Plans:
   2. Each page shows the file's last-modified timestamp
   3. When a markdown file in the vault is modified on disk, the currently displayed page auto-refreshes without the user doing anything
   4. User can navigate to a vault-wide directory listing showing all available documents
-**Plans**: TBD
+**Plans:** 3 plans
+Plans:
+- [ ] 04-01-PLAN.md — ANSI splash screen on index.md and file metadata in status bar
+- [ ] 04-02-PLAN.md — Virtual directory listing via [[Directory]] wiki-link
+- [ ] 04-03-PLAN.md — Live filesystem watching with auto-refresh
 
 ## Progress
 
@@ -87,4 +91,4 @@ Phases execute in numeric order: 1 → 2 → 3 → 4
 | 1. Safety Foundation | 3/3 | Complete    | 2026-02-28 |
 | 2. Vault Core and Rendering | 3/3 | Complete    | 2026-02-28 |
 | 3. Navigation and Links | 2/2 | Complete    | 2026-02-28 |
-| 4. BBS Polish and Live Content | 0/TBD | Not started | - |
+| 4. BBS Polish and Live Content | 0/3 | Not started | - |