Build 20nm final release candidate

report/strict_audit_final_20nm/strict_audit_summary.md

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+# NavSea Strict Audit Summary
+
+## Scope
+
+- Compare page: `http://192.168.200.184/newpec/navsea-compare-karatsu-20nm.html`
+- Compare version: `compare-r11-20260401-0115`
+- Backend render audit: `/root/sourceserver/pbf/NavSea_Original_vs_Delivery_Render_Audit_Karatsu_20nm_2026-03-31.r7.json`
+
+## Visual Audit
+
+- changed pixels: `235857` / `256000`
+- changed ratio: `0.921316`
+- mean abs rgb: `[32.7825, 31.9123, 51.3612]`
+- rms rgb: `[56.2597, 51.4488, 69.7204]`
+- left crop: `[0, 150, 640, 550]`
+- right crop: `[640, 150, 1280, 550]`
+
+Artifacts:
+
+- `report/strict_audit_final_20nm/compare_full.png`
+- `report/strict_audit_final_20nm/compare_left.png`
+- `report/strict_audit_final_20nm/compare_right.png`
+- `report/strict_audit_final_20nm/compare_diff.png`
+
+## Hotspot AOI Audit
+
+### 东侧防波堤灯台区
+
+- id: `east_breakwater_marks`
+- notes: `防波堤灯台和港口标记区。优先验证远一点的灯台/航标是否也能稳定打出来。`
+- backend focus: `['p航路標識群', 'safety_icon_missing']`
+- changed pixels: `6975` / `6976`
+- changed ratio: `0.999857`
+- mean abs rgb: `[111.3999, 94.5026, 86.0499]`
+- pane box norm: `[0.83, 0.0, 1.0, 0.16]`
+- pane box pixels: `[531, 0, 640, 64]`
+- left image: `report/strict_audit_final_20nm/hotspots/east_breakwater_marks_left.png`
+- right image: `report/strict_audit_final_20nm/hotspots/east_breakwater_marks_right.png`
+- diff image: `report/strict_audit_final_20nm/hotspots/east_breakwater_marks_diff.png`
+
+### 高岛主港航标区
+
+- id: `takashima_main_harbor_marks`
+- notes: `主港口灯塔、红绿标识、近岸障碍标记。优先验证灯塔、小灯、红绿标识是否真正恢复。`
+- backend focus: `['p航路標識群', 'safety_icon_missing', 'text_missing_in_engineering']`
+- changed pixels: `9533` / `11760`
+- changed ratio: `0.810629`
+- mean abs rgb: `[24.2571, 22.39, 27.698]`
+- pane box norm: `[0.34, 0.05, 0.57, 0.25]`
+- pane box pixels: `[218, 20, 365, 100]`
+- left image: `report/strict_audit_final_20nm/hotspots/takashima_main_harbor_marks_left.png`
+- right image: `report/strict_audit_final_20nm/hotspots/takashima_main_harbor_marks_right.png`
+- diff image: `report/strict_audit_final_20nm/hotspots/takashima_main_harbor_marks_diff.png`
+
+### 高岛近岸碍航与鱼礁区
+
+- id: `takashima_inner_nearshore_hazards`
+- notes: `近岸鱼礁、碍航点、灯塔与小灯混合区。优先验证鱼礁和碍航物是否还在。`
+- backend focus: `['p投錨注意障害物', 'p航行危険障害物', 'p航路標識群']`
+- changed pixels: `5708` / `7820`
+- changed ratio: `0.729923`
+- mean abs rgb: `[21.7578, 22.3706, 25.4146]`
+- pane box norm: `[0.44, 0.14, 0.62, 0.31]`
+- pane box pixels: `[282, 56, 397, 124]`
+- left image: `report/strict_audit_final_20nm/hotspots/takashima_inner_nearshore_hazards_left.png`
+- right image: `report/strict_audit_final_20nm/hotspots/takashima_inner_nearshore_hazards_right.png`
+- diff image: `report/strict_audit_final_20nm/hotspots/takashima_inner_nearshore_hazards_diff.png`
+
+## Backend Render Audit
+
+- original feature instances: `258317`
+- delivery feature instances: `258317`
+- result count: `516634`
+
+Status counts:
+
+- `extra_in_engineering`: `258317`
+- `missing_in_engineering`: `258317`
+
+Top annotation issues:
+
+- `extra_text_in_engineering` | `bathymetry_line` | `24168`
+- `text_missing_in_engineering` | `L海底地形` | `24168`
+- `extra_text_in_engineering` | `depth_contour` | `11929`
+- `text_missing_in_engineering` | `L等深線` | `11929`
+- `extra_text_in_engineering` | `seabed_text_point` | `4499`
+- `text_missing_in_engineering` | `p底質` | `4499`
+- `extra_text_in_engineering` | `navigation_marks` | `1516`
+- `text_missing_in_engineering` | `p航路標識群` | `1516`
+- `text_missing_in_engineering` | `p地名` | `1444`
+- `extra_text_in_engineering` | `place_label_sea` | `1444`
+
+Top style semantic issues:
+
+- `depth_numeric_missing` | `L海底地形` | `24168`
+- `depth_numeric_missing` | `L等深線` | `11929`
+- `safety_icon_missing` | `p航路標識群` | `1885`
+- `depth_numeric_missing` | `L概略等深線` | `350`
+- `clearance_numeric_missing` | `p高さ制限` | `33`
+
+## Interpretation
+
+- This report intentionally puts browser-rendered visual output and backend render-audit summary in one place.
+- If the browser screenshot improves but backend counts do not, the current backend audit is likely blind to a browser/runtime issue such as sprite resolution.