docs(04-02): complete directory listing plan

- 04-02-SUMMARY.md created with full deviations, decisions, and dependency graph
- STATE.md updated: position to plan 2/3, decisions, session continuity, metrics
- ROADMAP.md updated: phase 4 progress 2/3 plans complete
- REQUIREMENTS.md: LIVE-02 marked complete

.planning/ROADMAP.md

@@ -75,7 +75,7 @@ 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:** 3 plans
+**Plans:** 2/3 plans executed
 Plans:
 - [x] 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
@@ -91,4 +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 | 1/3 | In progress | - |
+| 4. BBS Polish and Live Content | 2/3 | In Progress|  |