Improve sixty-fourth battle map detail

docs/visual-asset-sixty-fourth-map-repaint-v1-report.md

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+# Sixty-Fourth Battle Map Repaint v1
+
+Date: 2026-07-10
+
+## Target
+
+- Battle: `sixty-fourth-battle-weishui-camps`
+- Asset: `src/assets/images/battle/sixty-fourth-battle-map.webp`
+- Generator: `scripts/generate-handpaint-map-sample.py`
+
+## Changes
+
+- Added a `weishui-camps` detail profile for the 64th battle map.
+- Added river current strokes, bank reeds, denser forest canopies, road ruts, camp flags, supply tents, and beacon/smoke markers.
+- Rendered the source pass at 112 px/tile, then downsampled the runtime asset to 64 px/tile for browser/WebGL stability.
+- Added `--webp-method` so large map export speed can be tuned without changing output quality.
+
+## Asset Result
+
+- Previous tracked-style reference: 14,336 x 12,320, 18,259,100 bytes.
+- New runtime asset: 8,192 x 7,040, 7,879,728 bytes.
+- The game scales battle-map art to the tactical tile layout, so the runtime image keeps desktop visual coverage while reducing single-texture pressure.
+
+## Visual Evidence
+
+- Source preview: `docs/visual-asset-sixty-fourth-map-repaint-v1-source-preview.png`
+- Before/after preview: `docs/visual-asset-sixty-fourth-map-repaint-v1-before-after.png`
+- Browser deployment capture: `docs/visual-asset-sixty-fourth-map-repaint-v1-deploy.png`
+- Browser battle start capture: `docs/visual-asset-sixty-fourth-map-repaint-v1-start.png`
+- River/center capture: `docs/visual-asset-sixty-fourth-map-repaint-v1-center.png`
+- Camp/fort detail capture: `docs/visual-asset-sixty-fourth-map-repaint-v1-camp.png`
+- Beacon-side capture: `docs/visual-asset-sixty-fourth-map-repaint-v1-beacon.png`
+- Lower-right forest capture: `docs/visual-asset-sixty-fourth-map-repaint-v1-lower-right.png`
+
+## Validation
+
+- `python -m py_compile scripts/generate-handpaint-map-sample.py`
+- `pnpm run verify:static-data`
+- `pnpm run build`
+- `pnpm run audit:visual-assets`
+- `git diff --check`
+
+Browser QA reached deployment and in-battle screens on the 64th battle. A stale Phaser image-processing error remained in the browser log buffer from an earlier pre-restart recapture, but the final clean server run rendered the map, deployment UI, and in-battle detail captures successfully.