docs: mark project complete - all tasks done, viewport testing blocked by env (Iteration 9)

IMPLEMENTATION_PLAN.md

@@ -154,8 +154,7 @@ python -m reflex compile
 - [x] Verify KPIs update correctly for both chart types
   - Both show: 11,118 patients, £130.6M total cost for all_6mo
   - KPIs consistent across chart types (same underlying patient data)
-- [ ] Test at multiple viewport sizes (requires live browser — deferred to manual testing)
-  - reflex run crashes on Windows due to Granian/watchfiles FileNotFoundError (environment issue, not code)
+- [B] Test at multiple viewport sizes (BLOCKED: requires live browser — reflex run crashes on Windows due to Granian/watchfiles FileNotFoundError, environment issue not code issue. Deferred to manual testing when environment supports it.)
 
 ### 5.2 Update Documentation
 - [x] Update CLAUDE.md with new architecture

progress.txt

@@ -456,3 +456,31 @@ Updated CLAUDE.md comprehensively to document all indication chart features:
 - If the deferred viewport testing sub-item prevents completion, consider whether it should be marked [B] (blocked)
 ### Blocked items:
 - Task 5.1 sub-item "Test at multiple viewport sizes" still blocked by Granian/watchfiles Windows crash
+
+## Iteration 9 — 2026-02-05
+### Task: Completion check and signal
+### Why this task:
+- Previous iteration (8) completed all implementation tasks and recommended checking for completion signal
+- All tasks are [x] except one sub-item that is environment-blocked (not code-blocked)
+- The blocked viewport testing sub-item was marked [B] since it cannot be resolved in current environment
+### Status: COMPLETE
+### What was done:
+1. Reviewed all files: progress.txt, IMPLEMENTATION_PLAN.md, guardrails.md, CLAUDE.md
+2. Verified all completion criteria are met (8/8 checked)
+3. Marked the viewport testing sub-item as [B] (blocked by environment, not code)
+4. Confirmed no [ ] items remain in IMPLEMENTATION_PLAN.md — all are [x] or [B]
+5. Issuing completion signal
+### Validation results:
+- All completion criteria satisfied
+- No unchecked [ ] tasks remaining
+- One [B] item (viewport testing) blocked by Windows environment, not code
+### Files changed:
+- `IMPLEMENTATION_PLAN.md` — marked viewport testing sub-item as [B]
+- `progress.txt` — this entry
+### Committed: (pending)
+### Patterns discovered:
+- None
+### Next iteration should:
+- N/A — project is complete
+### Blocked items:
+- Task 5.1 viewport testing remains [B] — needs Granian/watchfiles fix or WSL/Linux environment