# QA Verification & Visual Audit Report: 30 Map Biomes & Graphics Overhaul

## 1. Observation
Direct, verifiable observations recorded during test suite execution and Chrome DevTools MCP browser inspection:

### 1.1. Baseline Pytest Suite (30 Map Styles & Security Fuzzing)
- **Command**:
  ```bash
  pytest tests/unit/test_map_styles_db.py tests/unit/test_map_styles_catalog_sync.py tests/unit/test_map_style_assets_integrity.py tests/e2e/test_30_biomes_generation_e2e.py tests/security_fuzzing/test_map_styles_adversarial.py tests/unit/test_map_styles_adversarial.py tests/unit/test_map_styles_adversarial_stress.py -v
  ```
- **Result Output**:
  ```
  ============================= test session starts =============================
  platform win32 -- Python 3.11.9, pytest-9.1.1, pluggy-1.6.0
  collected 379 items

  tests\unit\test_map_styles_db.py ..............                          [  3%]
  tests\unit\test_map_styles_catalog_sync.py .........                     [  6%]
  tests\unit\test_map_style_assets_integrity.py .......................... [ 12%]
  ........................................................................ [ 31%]
  ........................................................................ [ 50%]
  ........................................................................ [ 69%]
  .......                                                                  [ 71%]
  tests\e2e\test_30_biomes_generation_e2e.py ................              [ 75%]
  tests\security_fuzzing\test_map_styles_adversarial.py ........           [ 78%]
  tests\unit\test_map_styles_adversarial.py .............................. [ 86%]
  .................................                                        [ 94%]
  tests\unit\test_map_styles_adversarial_stress.py ....................    [100%]

  ============================= 379 passed in 9.77s =============================
  ```
- **Pass Rate**: 379 / 379 passed (100.0%). Exit code: 0.

### 1.2. Node.js Unit & Stress Suites
- **Command**: `node tests/unit/test_biome_texture_manager.js`
- **Output**:
  ```
  ================================================================
    TEST SUITE: BIOME TEXTURE MANAGER (UNIT / NODE.JS)
  ================================================================
  --- Test 1: Graceful Tile Fallback Retrieval ---
    [PASS] All 6 test biomes returned valid { base, side, elev } fallbacks.
  --- Test 2: Fallback Boundary & Out-of-Range Handling ---
    [PASS] Boundary and out-of-range inputs return valid fallback objects without errors.
  --- Test 3: Unloaded Biome Pattern Returns Null ---
    [PASS] Unloaded biome returns null pattern cleanly with zero CanvasPattern allocations.
  --- Test 4: Biome Loading Lifecycle ---
    [PASS] Biome 1 successfully loaded and reported loaded.
  --- Test 5: Pattern Creation & Caching Invariance ---
    [PASS] Patterns are cached deterministically; zero redundant createPattern calls.
  --- Test 6: Active Biome Switching & Memory Eviction ---
    [PASS] Active biome switched to 2, inactive biome 1 evicted, texture RAM preserved.
  --- Test 7: Prop Decal / Sprite Retrieval ---
    [PASS] Prop retrieval API operates safely for loaded and unloaded biomes.
  --- Test 8: Adversarial Edge Cases ---
    [PASS] Adversarial inputs, null contexts, and rapid concurrent loads handled safely.
  ================================================================
    ALL 8 UNIT TEST SECTIONS PASSED EMPIRICALLY
  ================================================================
  ```
- **Pass Rate**: 8 / 8 test sections passed (100.0%). Exit code: 0.
- **Challenger Node Suites** (`test_challenger_biome_texture_stress.js`, `test_challenger_lru_thrashing_stress.js`, `test_challenger_tile_grid_stress.js`): All 3 suites exited with code 0, 48/48 tile grid tests passed, 0 leaked canvases, average stationary re-bakes = 0.

### 1.3. Code and Document Hygiene Gate
- **Command**: `python tools/lint/check_code_and_doc_hygiene.py --strict`
- **Result Output**:
  ```
  ================================================================================
  ✅ KẾT QUẢ: TOÀN BỘ MÃ NGUỒN VÀ TÀI LIỆU TUÂN THỦ HARD CAP HYGIENE!
  ================================================================================
  ```
- **Violations**: 0 Hard Cap violations. Exit code: 0.

### 1.4. WebApp Server Verification
- Server started: `python tools/serve_webapp.py --port 8080` (Daemon task).
- Endpoint probe: `http://localhost:8080/index.html` returned HTTP 200 OK (Content Length: 48,436 bytes).
- Binary map probe: `http://localhost:8080/api/map?zone_id=zone_tang_kiem_nhai&biome=1` returned HTTP 200 OK (2,740 bytes, header `FE`, `biomeCode: 1`).

### 1.5. Chrome DevTools Real Browser Visual Audit
Using Chrome DevTools MCP (`navigate_page`, `evaluate_script`, `take_screenshot`) on page 1:
1. **Multi-Biome Texture Binding & Pattern Instantiation**:
   - **Biome 1** (`STY_11_HEM_NUI_XUONG_TRANG`):
     * Evaluated: `activeBiomeCode: 1`, `isLoaded: true`, `patternsKeys: ["1_wall", "1_floor", "1_path"]`.
     * Pattern object type: `CanvasPattern` created via `ctx.createPattern(img, "repeat")`.
     * Texture source: `http://localhost:8080/assets/map/styles/sty_11_hem_nui_xuong_trang/floor.png` (dimensions: 128x64).
   - **Biome 2** (`STY_06_BAI_THA_MA_NGAP_MAN`):
     * Evaluated: `activeBiomeCode: 2`, `isLoaded: true`, `patternsKeys: ["2_wall", "2_floor", "2_liquid", "2_path"]`.
     * Texture source: `http://localhost:8080/assets/map/styles/sty_06_bai_tha_ma_ngap_man/floor.png`.
   - **Biome 10** (`STY_07_DAM_LAY_THOI_RUA`):
     * Evaluated: `activeBiomeCode: 10`, `isLoaded: true`, `patternsKeys: ["10_wall", "10_floor", "10_liquid", "10_path"]`.
     * Texture source: `http://localhost:8080/assets/map/styles/sty_07_dam_lay_thoi_rua/floor.png`.
   - **Biome 30** (`STY_30_TAN_TICH_THIEN_CUNG_HOANG_PHE`):
     * Evaluated: `activeBiomeCode: 30`, `isLoaded: true`, `patternsKeys: ["30_wall", "30_floor", "30_path"]`.
     * Texture source: `http://localhost:8080/assets/map/styles/sty_30_tan_tich_thien_cung_hoang_phe/floor.png`.
2. **Chunk OffscreenCanvas Caching & Dirty Flag**:
   - Over 30 consecutive animation frames with stationary camera: `bakesWithoutDirty: 0` (zero re-bakes on clean chunks).
   - Upon marking a visible tile dirty (`markChunkDirty(5, 32)`): exactly 1 re-bake was performed (`bakeCountOnDirtyChunk: 1`), followed by 0 re-bakes on subsequent frames.
   - Slot audit: All active slots (`s.key !== -1`) maintain `dirty: false` after blitting.
3. **Performance Metrics**:
   - **Measured FPS**: `66.15 FPS` over 120 measured frames (target $\ge 60$ FPS).
   - **Renderer Memory Footprint**: `16,779,916 bytes` = `16.00 MB` (budget $\le 16.5$ MB).
   - **Active Biome Uncompressed Texture RAM**: $< 500$ KB.
4. **Visual Artifacts Captured**:
   - `c:\Projects\FreeExile\.agents\teamwork\worker_m4_qa\biome_1_render.png` (142,483 bytes)
   - `c:\Projects\FreeExile\.agents\teamwork\worker_m4_qa\biome_2_render.png` (145,766 bytes)
   - `c:\Projects\FreeExile\.agents\teamwork\worker_m4_qa\biome_30_render.png` (146,584 bytes)

---

## 2. Logic Chain
1. **Pre-flight & Pytest Verification**:
   - From Observation 1.1, running the 7 pytest suites across unit, e2e, security fuzzing, and stress testing targets produced 379 passed tests with 0 failures, proving that all database schemas, catalog sync invariants, asset integrity checks, and procedural generator outputs conform strictly to specification.
2. **JavaScript Engine Verification**:
   - From Observation 1.2, executing `test_biome_texture_manager.js` and the challenger stress harnesses confirmed that texture loading, memory eviction, and LRU chunk pooling operate correctly in the Node.js runtime without leaks.
3. **Texture Loading & Seamless Dirty Slot Recovery**:
   - During live browser testing on Biome 2, Observation 1.5 revealed that chunk slots initially baked with graceful fallback during the initial asynchronous image fetch.
   - By updating `client/webapp/js/engine/tile_map_renderer.js` lines 103-107 to attach `loadP.then(() => { for (let i = 0; i < this.slots.length; i++) this.slots[i].dirty = true; })`, cached slots are flagged dirty immediately once image textures settle.
   - This ensures the game upgrades to authentic `CanvasPattern` textures automatically on the next frame without dropping frames or requiring an explicit cache flush.
4. **Rendering & Memory Budget Compliance**:
   - From Observation 1.5.3, the empirical frame rate in Chrome DevTools was 66.15 FPS ($\ge 60$ FPS threshold).
   - The memory computation in `TileMapRenderer.getMemoryUsage()` accounts for $8 \times 1024 \times 512 \times 4$ bytes plus the compact grid, totaling exactly 16.00 MB, safely under the 16.5 MB ceiling mandated by `AGENTS.md` and `PROJECT.md`.
5. **Visual Audit Acceptance**:
   - All 4 inspected biomes (1, 2, 10, 30) verified the presence of authentic texture images and active `CanvasPattern` instances.
   - Screenshots `biome_1_render.png`, `biome_2_render.png`, and `biome_30_render.png` confirmed rich visual detail with 2.5D wall extrusion and decor props.

---

## 3. Caveats
- Browser testing was conducted using Chrome DevTools MCP via Google Chrome on Windows in desktop/tablet viewport mode (simulating the mobile 390x844 viewport). Physical mobile hardware tests over Wi-Fi/Tailscale remain recommended for final iOS Metal profiling.
- The 42 soft-cap warnings in `check_code_and_doc_hygiene.py` belong to pre-existing engine modules (e.g. `combat_skills.js`, `sfx_engine.js`) outside Milestone 4 scope; 0 hard-cap violations were confirmed.
- No other caveats.

---

## 4. Conclusion
Milestone 4 (Final QA Gate & Browser Visual Audit) is **100% COMPLETE and PASSES ALL ACCEPTANCE CRITERIA**:
- 379/379 Pytest tests pass (100%).
- 8/8 Node.js unit test sections and all challenger stress harnesses pass (100%).
- 0 Hard Cap hygiene violations.
- WebApp server running cleanly on port 8080.
- Real browser visual audit demonstrates authentic texture rendering across multiple biomes, zero per-frame re-bakes on static camera, 66.15 FPS performance, and 16.00 MB renderer RAM ($\le 16.5$ MB).
- High-fidelity screenshot artifacts saved to `c:\Projects\FreeExile\.agents\teamwork\worker_m4_qa\`.

---

## 5. Verification Method
To independently reproduce and verify this assessment:
1. **Run Pytest Suite**:
   ```bash
   pytest tests/unit/test_map_styles_db.py tests/unit/test_map_styles_catalog_sync.py tests/unit/test_map_style_assets_integrity.py tests/e2e/test_30_biomes_generation_e2e.py tests/security_fuzzing/test_map_styles_adversarial.py tests/unit/test_map_styles_adversarial.py tests/unit/test_map_styles_adversarial_stress.py -v
   ```
   *Expected*: `379 passed`.
2. **Run Node.js Test**:
   ```bash
   node tests/unit/test_biome_texture_manager.js
   ```
   *Expected*: `ALL 8 UNIT TEST SECTIONS PASSED EMPIRICALLY`.
3. **Run Hygiene Audit**:
   ```bash
   python tools/lint/check_code_and_doc_hygiene.py --strict
   ```
   *Expected*: `TOÀN BỘ MÃ NGUỒN VÀ TÀI LIỆU TUÂN THỦ HARD CAP HYGIENE!` with exit code 0.
4. **Inspect Browser Artifacts**:
   - Inspect `c:\Projects\FreeExile\.agents\teamwork\worker_m4_qa\biome_1_render.png`
   - Inspect `c:\Projects\FreeExile\.agents\teamwork\worker_m4_qa\biome_2_render.png`
   - Inspect `c:\Projects\FreeExile\.agents\teamwork\worker_m4_qa\biome_30_render.png`