docs: fix 7 inaccuracies in implementation tracker after systematic review

Corrections:
- Remove duplicate task 7.3 (Gap A4 already in Phase 2 task 2.3), renumber
- Fix task 3.5: remove false DELETE claim (note-relationships has GET+POST only)
- Fix task 1.2: add note about removing dead 'export { blobClient }' re-export
- Fix 'How to Use' parallelization: Phase 5 needs Phase 1 only, not Phase 3
- Add phase-level [ ] checkboxes to all 8 phase headers
- Align Phase 3 test target: '60+' → '~60-75' (matches summary table)
- Fix Phase 7 effort estimate (4-5h → 3-4h after removing duplicate task)
- Fix test target summary to use ranges instead of single estimates

docs/IMPLEMENTATION_TRACKER.md

@@ -8,12 +8,12 @@
 
 ## How to Use This Document
 
-- Each phase has a top-level checkbox that tracks overall phase completion.
+- Each task has its own checkbox. Check it off and add the commit SHA in parentheses when done.
-- Each task within a phase has its own checkbox.
-- When a task is completed, check it off and add the commit SHA in parentheses.
 - Run the verification commands listed in each phase before marking it done.
-- Phases are sequenced by dependency — complete Phase 1 before Phase 2, etc.
+- **Dependency chain:** Phase 1 → Phase 2 → Phase 3 (critical path).
-- Phases 1–3 are the critical path. Phases 4–7 can be parallelized after Phase 3.
+- **After Phase 1:** Phase 5 (DevOps) can start in parallel.
+- **After Phase 3:** Phases 4, 6, 7 can be parallelized.
+- **Phase 8** (docs) runs last, after all other phases.
 
 ---
 
@@ -27,7 +27,7 @@
 
 ---
 
-## Phase 1 — Bug Fixes (Gaps A1–A6, D3–D4)
+## Phase 1 — Bug Fixes (Gaps A1–A6, D3–D4) [ ]
 
 **Goal:** Eliminate all runtime bugs and latent crash risks. Clean dead code.
 **Estimated effort:** 2–3 hours
@@ -42,7 +42,8 @@
 
 - [ ] **1.2** Lazy-init `blobClient` in `web/src/lib/blob-client.ts` (Gap A1)
   - Replace `const blobClient = createBlobClient(...)` with lazy singleton `function getBlobClient()`
-  - Update all call sites within the file (`blobClient.getSasUrl(...)` → `getBlobClient().getSasUrl(...)`)
+  - Update all 4 call sites within the file (`blobClient.getSasUrl(...)` → `getBlobClient().getSasUrl(...)`)
+  - Remove dead re-export `export { blobClient }` on line 48 (zero external imports)
   - File: `web/src/lib/blob-client.ts`
 
 - [ ] **1.3** Add `"use client"` directive to `web/src/lib/notes-client.ts` (Gap A6)
@@ -82,7 +83,7 @@ fix(web): lazy-init extraction + blob clients, add use-client to notes-client
 
 ---
 
-## Phase 2 — Code Quality (Gaps D1–D2, A3–A4)
+## Phase 2 — Code Quality (Gaps D1–D2, A3–A4) [ ]
 
 **Goal:** Consolidate duplicate types, optimize N+1 queries.
 **Estimated effort:** 2–3 hours
@@ -128,7 +129,7 @@ refactor(web): consolidate types, optimize N+1 queries [D1, A3, A4, D2]
 
 ---
 
-## Phase 3 — Backend Test Depth (Gap A5)
+## Phase 3 — Backend Test Depth (Gap A5) [ ]
 
 **Goal:** Replace registration-only route tests with real API behavior tests.
 **Estimated effort:** 3–4 hours
@@ -159,8 +160,9 @@ refactor(web): consolidate types, optimize N+1 queries [D1, A3, A4, D2]
   - File: `backend/src/modules/note-artifacts/routes.test.ts`
 
 - [ ] **3.5** Add integration tests for `note-relationships` routes
-  - Test: POST create → GET list → DELETE
+  - Test: POST create → GET list (by workspaceId + noteId)
-  - Target: 3–5 tests
+  - Note: no DELETE route exists — only GET and POST are implemented
+  - Target: 3–4 tests
   - File: `backend/src/modules/note-relationships/routes.test.ts`
 
 - [ ] **3.6** Add integration tests for `note-agent-actions` routes
@@ -178,7 +180,7 @@ refactor(web): consolidate types, optimize N+1 queries [D1, A3, A4, D2]
 
 ```bash
 cd backend && npm run typecheck && npm test
-# Target: 60+ tests (up from 24)
+# Target: ~60–75 tests (up from 24)
 ```
 
 ### Commit convention
@@ -189,7 +191,7 @@ test(backend): add integration tests for all 7 route modules [A5]
 
 ---
 
-## Phase 4 — Web Feature Gaps (Gaps B1, B2, B8)
+## Phase 4 — Web Feature Gaps (Gaps B1, B2, B8) [ ]
 
 **Goal:** Add missing web CRUD flows that the PRD requires.
 **Estimated effort:** 3–4 hours
@@ -240,11 +242,11 @@ feat(web): add create note, archive/restore, link note flows [B1, B2, B8]
 
 ---
 
-## Phase 5 — DevOps (Gaps C1–C5)
+## Phase 5 — DevOps (Gaps C1–C5) [ ]
 
 **Goal:** Docker builds, CI, and deployment readiness.
 **Estimated effort:** 2–3 hours
-**Dependencies:** Phase 1 (`output: "standalone"` must be set first).
+**Dependencies:** Phase 1 only (`output: "standalone"` must be set first). Can run in parallel with Phases 2–3.
 
 ### Tasks
 
@@ -294,7 +296,7 @@ feat(devops): Dockerfiles, docker-compose, CI, docker-prep [C1–C5]
 
 ---
 
-## Phase 6 — E2E & Mobile Tests (Gaps B7, C4)
+## Phase 6 — E2E & Mobile Tests (Gaps B7, C4) [ ]
 
 **Goal:** Playwright E2E for web, Vitest for mobile.
 **Estimated effort:** 3–4 hours
@@ -357,11 +359,12 @@ test(mobile): add store and API client unit tests [B7]
 
 ---
 
-## Phase 7 — AI Enrichment & Advanced Features (Gaps B3, B6)
+## Phase 7 — AI Enrichment & Advanced Features (Gaps B3, B6) [ ]
 
 **Goal:** Add extraction-backed enrichment and import/export.
-**Estimated effort:** 4–5 hours
+**Estimated effort:** 3–4 hours
 **Dependencies:** Phase 3 (backend test patterns), Phase 4 (web CRUD flows).
+**Note:** Gap A4 (workspace note count optimization) is fully addressed in Phase 2 task 2.3 — not duplicated here.
 
 ### Tasks
 
@@ -378,18 +381,11 @@ test(mobile): add store and API client unit tests [B7]
   - Add "Export" button on web workspace page
   - Files: `backend/src/modules/notes/routes.ts`, `web/src/app/(app)/workspaces/page.tsx`
 
-- [ ] **7.3** Add workspace-level note count to backend (Gap A4)
+- [ ] **7.3** Add tests for new endpoints
-  - Add `noteCount` field to workspace list response
-  - Use Cosmos cross-query or batch aggregate
-  - Remove the client-side all-notes fetch from `listWorkspaceSummaries()`
-  - Files: `backend/src/modules/workspaces/repository.ts`, `web/src/lib/notes-client.ts`
-
-- [ ] **7.4** Add tests for new endpoints
   - Test: summarize route (mock extraction-service)
   - Test: export route (JSON + Markdown formats)
-  - Test: workspace list with note counts
+  - Target: 4–8 tests
-  - Target: 6–10 tests
+  - Files: `backend/src/modules/notes/routes.test.ts`
-  - Files: `backend/src/modules/notes/routes.test.ts`, `backend/src/modules/workspaces/routes.test.ts`
 
 ### Verification
 
@@ -401,13 +397,13 @@ cd web && npm run typecheck && npm test && npm run build
 ### Commit convention
 
 ```
-feat(backend): note summarization, export, workspace note counts [B3, B6, A4]
+feat(backend): note summarization + export endpoints [B3, B6]
 feat(web): summarize + export UI triggers [B3, B6]
 ```
 
 ---
 
-## Phase 8 — Documentation Alignment (Gaps E1–E2)
+## Phase 8 — Documentation Alignment (Gaps E1–E2) [ ]
 
 **Goal:** Update all docs to reflect the final implementation state.
 **Estimated effort:** 1 hour
@@ -472,11 +468,11 @@ Track completed phases and commits here as work progresses.
 
 | Surface | Before | After Phase 3 | After Phase 6 | After Phase 7 |
 |---------|--------|---------------|---------------|---------------|
-| Backend | 24 tests (12 files) | ~75 tests | ~75 tests | ~85 tests |
+| Backend | 24 tests (12 files) | ~60–75 tests | ~60–75 tests | ~70–85 tests |
 | Web unit | 6 tests (5 files) | 6 tests | ~12 tests | ~12 tests |
 | Web E2E | 0 | 0 | ~20 tests | ~20 tests |
 | Mobile | 0 | 0 | ~15 tests | ~15 tests |
-| **Total** | **30** | **~81** | **~122** | **~132** |
+| **Total** | **30** | **~66–81** | **~107–122** | **~117–132** |
 
 ---