P64（A3 成熟度）证据分析 — 真实 Desktop 实跑 xvfb 1280x720
钩子：LV_P64_SHOT=1 LV_LEGACY_MAP=1（可玩样板地图），3 帧：p64-overview / p64-bridge / p64-interior
内景路径：真实 Sim.step 走向门口 → 真实 Interact 进门；桥位置/通行不变，仅增强可读性

plan: upper_band_props=11 upper_band_kinds=4 bridge_props=1 bridge_foot_tiles=3 bridge_abutments=4 interior_elements=8

p64-overview.png  1280x720 mean=86.3 std=33.3 max_dark_block=0 max_white_block=15
p64-bridge.png  1280x720 mean=86.0 std=33.1 max_dark_block=0 max_white_block=15
p64-interior.png  1280x720 mean=118.7 std=54.1 max_dark_block=0 max_white_block=52

overview upper-band non-background ratio (y 120..360) = 0.1812  (P62 基线 0.1030)
bridge region wood-pixel ratio (x 560..720, y 360..500) = 9065/22400 = 0.4047
rail strips [p64-overview] cam=(384,344) left=0.942 right=0.933 (threshold 0.7)
rail strips [p64-bridge] cam=(384,568) left=1.000 right=0.996 (threshold 0.7)

log: p64-shot=p64-bridge tick=2592000 avatar=(1008,912) camera=(384,568) home=Outside
log: p64-shot=p64-interior tick=2592056 avatar=(1008,763) camera=(384,568) home=Inside (HomeId 1)
log: p64-shot=p64-overview tick=2592000 avatar=(1008,688) camera=(384,344) home=Outside

p64-overview vs p64-bridge mean_abs_diff=12.6
p64-overview vs p64-interior mean_abs_diff=51.1
p64-bridge vs p64-interior mean_abs_diff=51.1

缺字空白位 total=0（三帧仅中文经 CjkGlyphAtlas 绘制；P61 覆盖测试绿）

verdict: PASS