refactor: rename MERGE_CHECKLIST to ALL_TESTS + add per-service test files

- tests/MERGE_CHECKLIST.md → tests/ALL_TESTS.md (git rename, updated header + index of sub-files)
- tests/backend_tests.md — §1–9, §18 (auth, users, admin, groups, appearance, service health, plugins, AI/doc settings, infra/security)
- tests/frontend_tests.md — §19 (UI & routing)
- tests/doc-service_tests.md — §10–16 (upload/processing, list/filtering, slide-over, sharing, categories, bulk actions, watch directory)
- tests/ai-service_tests.md — §17 (AI queue & providers)
- CLAUDE.md: updated merge checklist section, file tree, and self-update checkpoint with mandatory test-file update rule
- settings.local.json: added docker inspect/ps, curl, lsof, git merge/branch/log/diff/status/config/mv permissions

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

CLAUDE.md

@@ -11,7 +11,14 @@ This file provides permanent, authoritative guidance to Claude Code for every se
 
 ## Merge checklist
 
-Before merging any feature branch into `main`, every test relevant to the changed area in `tests/MERGE_CHECKLIST.md` must be marked passing. The checklist covers all 19 feature areas (auth, users, admin, groups, appearance, service health, plugins, AI settings, doc settings, upload/processing, list/filtering, slide-over, sharing, categories, bulk actions, watch directory, AI queue, infrastructure/security, and frontend routing). Do not merge without it.
+Before merging any feature branch into `main`, every test relevant to the changed area in `tests/ALL_TESTS.md` (and the relevant service-specific file) must be marked passing. The test suite covers all 19 feature areas across four service files:
+
+- `tests/backend_tests.md` — §1–9, §18
+- `tests/frontend_tests.md` — §19
+- `tests/doc-service_tests.md` — §10–16
+- `tests/ai-service_tests.md` — §17
+
+Do not merge without it.
 
 ---
 
@@ -28,6 +35,8 @@ Before merging any feature branch into `main`, every test relevant to the change
 - New Docker service, volume, network, or env var → update **Docker Infrastructure** in this file
 - Stack version changed → update **Stack** in this file
 
+- New feature or endpoint added → add test rows to **both** `tests/ALL_TESTS.md` (in the relevant section) **and** the matching service-specific file (`tests/backend_tests.md`, `tests/frontend_tests.md`, `tests/doc-service_tests.md`, or `tests/ai-service_tests.md`). Use the same test number and format as existing rows.
+
 This check is mandatory — treat it the same as updating STATUS.md.
 
 ---
@@ -77,7 +86,11 @@ For service-specific commands (migrations, lint), see `backend/CLAUDE.md` and `f
 ├── .githooks/pre-commit                   ← Runs scripts/security_check.py before every commit
 ├── scripts/security_check.py             ← Static analysis: secrets, weak crypto, SQLi, JWT
 ├── changelog/YYYY-MM-DD_<slug>.md        ← Per-date change logs
-├── tests/MERGE_CHECKLIST.md               ← 148-test pre-merge checklist (all features); must pass before merging to main
+├── tests/ALL_TESTS.md                     ← Full test suite (all 19 areas); must pass before merging to main
+├── tests/backend_tests.md                 ← Backend-only tests (§1–9, §18)
+├── tests/frontend_tests.md               ← Frontend-only tests (§19)
+├── tests/doc-service_tests.md            ← Doc-service tests (§10–16)
+├── tests/ai-service_tests.md             ← AI-service tests (§17)
 ├── dev-watch/                             ← Dev bind-mount for file watcher testing (.gitkeep only)
 │
 ├── backend/                               ← FastAPI gateway (port 8000, internal); see backend/CLAUDE.md