docs(02-04): complete companion text module plan

- SUMMARY.md with task commits and decisions
- STATE.md advanced to plan 4 of 5, 80% progress
- ROADMAP.md updated with plan progress
- Requirements COMP-01 through COMP-04 marked complete

.planning/STATE.md

@@ -3,14 +3,14 @@ gsd_state_version: 1.0
 milestone: v1.0
 milestone_name: milestone
 status: executing
-stopped_at: Completed 02-01-PLAN.md
-last_updated: "2026-03-29T09:57:41.199Z"
+stopped_at: Completed 02-04-PLAN.md
+last_updated: "2026-03-29T10:06:43.421Z"
 last_activity: 2026-03-29
 progress:
   total_phases: 4
   completed_phases: 1
   total_plans: 10
-  completed_plans: 7
+  completed_plans: 8
   percent: 0
 ---
 
@@ -26,7 +26,7 @@ See: .planning/PROJECT.md (updated 2026-03-29)
 ## Current Position
 
 Phase: 02 (gemini-integration-asset-pipeline) — EXECUTING
-Plan: 3 of 5
+Plan: 4 of 5
 Status: Ready to execute
 Last activity: 2026-03-29
 
@@ -59,6 +59,7 @@ Progress: [░░░░░░░░░░] 0%
 | Phase 01 P05 | 2min | 2 tasks | 4 files |
 | Phase 02 P02 | 2min | 2 tasks | 8 files |
 | Phase 02 P01 | 3min | 1 tasks | 6 files |
+| Phase 02 P04 | 1min | 1 tasks | 2 files |
 
 ## Accumulated Context
 
@@ -81,6 +82,7 @@ Recent decisions affecting current work:
 - [Phase 02]: Rate limiting stored in Settings singleton, no new IndexedDB store
 - [Phase 02]: Image generation no retry (expensive), text retries 3x exponential backoff
 - [Phase 02]: Config loader caches after first fetch, resetConfigCache() for testing
+- [Phase 02]: Each companion function independently checks config and rate limits (no shared wrapper) for clarity
 
 ### Pending Todos
 
@@ -92,6 +94,6 @@ None yet.
 
 ## Session Continuity
 
-Last session: 2026-03-29T09:57:41.192Z
-Stopped at: Completed 02-01-PLAN.md
+Last session: 2026-03-29T10:06:43.414Z
+Stopped at: Completed 02-04-PLAN.md
 Resume file: None