Add sixty-fourth map runtime QA packet

docs/visual-asset-sixty-fourth-map-runtime-qa.md

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+# Sixty-Fourth Battle Map Runtime QA
+
+- Date: 2026-07-10
+- Target battle: `sixty-fourth-battle-weishui-camps`
+- Map key: `battle-map-sixty-fourth`
+- Source asset: `src/assets/images/battle/sixty-fourth-battle-map.webp`
+- Audit trigger: lowest battle-map source density bucket, `128x110` grid at `112.0` source pixels per tile
+- Browser target: local Vite, `1280x720`, `http://127.0.0.1:4202/heros_web/?debug&debugBattle=sixty-fourth-battle-weishui-camps&v=visual-qa-sixty-fourth`
+
+## Captures
+
+| View | File | Notes |
+| --- | --- | --- |
+| Ally start / south bank | [visual-asset-sixty-fourth-map-start.png](visual-asset-sixty-fourth-map-start.png) | Initial tactical view after battle start. Dirt, forest, and unit silhouettes are readable, but the ground texture and round forest marks look flatter than the unit sprites. |
+| Central river band | [visual-asset-sixty-fourth-map-center.png](visual-asset-sixty-fourth-map-center.png) | River and grass lanes are easy to classify. The water reads as broad color bands with repeated ripple marks, so it feels more like a placeholder texture than a major Wei River crossing. |
+| Lower-right forest / enemy side | [visual-asset-sixty-fourth-map-lower-right.png](visual-asset-sixty-fourth-map-lower-right.png) | Dense forest blocks remain tactically readable. The repeated circular canopy pattern dominates the view and lacks camp-road, beacon, or supply-detail accents expected from this scenario. |
+
+## Findings
+
+- Runtime smoke check passed: the debug battle opened, the map rendered, battle start succeeded, and no browser warning/error logs were captured during the screenshot pass.
+- Tactical readability is acceptable. Grid, units, minimap, and terrain categories can be read at the desktop target viewport.
+- Immersion quality needs work. The map is usable, but the runtime screenshots confirm the audit risk: large terrain regions rely on low-variation blocks and repeated brush motifs, which makes this late-campaign map feel lower detail than the surrounding unit art and UI.
+- The central river and lower-right forest are the most important repaint targets because they occupy whole viewports and repeat across player navigation.
+
+## Decision
+
+Repaint or regenerate `src/assets/images/battle/sixty-fourth-battle-map.webp` before moving to the next story-background candidate.
+
+Recommended repaint constraints:
+
+- Preserve the `128x110` topology, deployment lanes, river crossings, forest masks, objective routes, and minimap readability.
+- Increase terrain micro-detail around the Wei River banks, south-bank supply camps, beacon routes, and lower-right enemy-side forest.
+- Add more shape variety to tree canopies and water ripples so repeated stamps are less visible under the grid.
+- Keep tile-category contrast strong enough that the tactical grid remains readable after downscaling to the battle viewport.
+
+## Verification
+
+- Local runtime: passed at `1280x720`.
+- Screenshots saved: 3.
+- Browser warning/error logs during runtime pass: none.