Add pilot small-scope image audit method

AGENTS.md

@@ -116,6 +116,7 @@ For the current 20nm visual baseline, prefer:
 
 - [`navsea_strict_audit.py`](/root/sourceserver/pbf/navsea_strict_audit.py)
 - [`strict_audit_hotspots_20nm.json`](/root/sourceserver/pbf/strict_audit_hotspots_20nm.json)
+- [`strict_audit_hotspots_20nm_pilot.json`](/root/sourceserver/pbf/strict_audit_hotspots_20nm_pilot.json)
 - visual review page:
   - `http://192.168.200.184/newpec/navsea-compare-karatsu-20nm.html`
 
@@ -125,6 +126,13 @@ Even when 10nm delivery is rebuilt and audited:
 - use `10nm` as the object-level backend audit reference only
 - do not silently switch the user's visual review baseline away from `20nm compare`
 
+For small-scope image audit experiments:
+
+- keep the style under test fixed to:
+  - [`src/pbf/style.navsea-delivery-karatsu-10nm.json`](/root/sourceserver/pbf/src/pbf/style.navsea-delivery-karatsu-10nm.json)
+- prefer the 3-hotspot pilot config first
+- use full hotspot coverage only when pilot hotspots are no longer enough
+
 This script combines:
 
 - browser-rendered screenshot diff from the fixed compare page

NavSea_20nm_Small_Scope_Audit_Method.md

@@ -0,0 +1,155 @@
+# NavSea 20nm Small Scope Audit Method
+
+## Goal
+
+用小范围图像对比去服务两件事：
+
+- 整理出当前继续收敛的唯一 `style.json`
+- 建立一套比“只看后台数字”更可信的审计方法
+
+这份方法不追求一次解释全部问题，只服务当前固定视觉基线：
+
+- compare page:
+  - `http://192.168.200.184/newpec/navsea-compare-karatsu-20nm.html`
+
+## Current Style Under Test
+
+当前继续整理、继续改的唯一 style 文件是：
+
+- repo source:
+  - [`src/pbf/style.navsea-delivery-karatsu-10nm.json`](/root/sourceserver/pbf/src/pbf/style.navsea-delivery-karatsu-10nm.json)
+- deployed copy:
+  - `/mnt/sda1/www/newpec/domain/style.navsea-delivery-karatsu-10nm.json`
+
+说明：
+
+- 虽然文件名里仍写着 `10nm`
+- 但当前 `20nm compare` 右侧实际就是用这份 style
+- 所以后续视觉复原应继续收敛这一个文件
+- 不再新增新的 delivery style 主文件，除非明确要分叉方案
+
+## Why Small Scope
+
+整屏图像 diff 太粗，只能说明“还是不一样”。
+
+当前更有效的方法是：
+
+- 只盯 3 个代表性热点
+- 每个热点绑定一类 backend 容易误判的问题
+- 用小范围截图 + 点击拾取 + backend issue family 一起判断
+
+这样做的目的不是追求一个漂亮的整屏 diff 数字，而是：
+
+- 让 style 修改有明确观察点
+- 让 backend audit 的问题项能和肉眼问题真正对应上
+
+## Pilot Hotspots
+
+当前试验版热点配置文件：
+
+- [`strict_audit_hotspots_20nm_pilot.json`](/root/sourceserver/pbf/strict_audit_hotspots_20nm_pilot.json)
+
+这 3 个热点分别代表：
+
+1. `takashima_main_harbor_marks`
+   - 看灯塔、小灯、红绿标识、近岸航标
+   - 对应 backend:
+     - `p航路標識群`
+     - `safety_icon_missing`
+     - `text_missing_in_engineering`
+
+2. `takashima_inner_nearshore_hazards`
+   - 看鱼礁、碍航点、近岸混合符号
+   - 对应 backend:
+     - `p投錨注意障害物`
+     - `p航行危険障害物`
+     - `p航路標識群`
+
+3. `east_breakwater_marks`
+   - 看远一点的防波堤灯台、港口标记
+   - 对应 backend:
+     - `p航路標識群`
+     - `safety_icon_missing`
+
+## Pilot Run
+
+当前试验版报告：
+
+- [`report/strict_audit_pilot/strict_audit_summary.md`](/root/sourceserver/pbf/report/strict_audit_pilot/strict_audit_summary.md)
+- [`report/strict_audit_pilot/strict_audit_summary.json`](/root/sourceserver/pbf/report/strict_audit_pilot/strict_audit_summary.json)
+
+热点截图目录：
+
+- [`report/strict_audit_pilot/hotspots`](/root/sourceserver/pbf/report/strict_audit_pilot/hotspots)
+
+本轮试验结果：
+
+- `takashima_main_harbor_marks`
+  - changed ratio: `0.783759`
+- `takashima_inner_nearshore_hazards`
+  - changed ratio: `0.744246`
+- `east_breakwater_marks`
+  - changed ratio: `0.617833`
+
+当前解读：
+
+- 这 3 个热点都足够敏感，能稳定反映当前 style 还没有复原到位
+- 其中主港航标区最适合做第一优先级视觉回归观察点
+- 东侧防波堤区差异最小，适合做“有没有被新改动误伤”的回归点
+
+## Trustworthy Audit Method
+
+当前建议的可信审计方法是四件事一起用：
+
+1. 固定视觉页面
+   - 只看 `20nm compare`
+
+2. 小范围 AOI 图像审计
+   - 只跑固定热点，不看整屏大 diff 做结论
+
+3. 点击拾取
+   - 在 compare 页里点具体对象
+   - 看右侧实际命中的 `source`、`source-layer`、`render layer` 和属性
+
+4. 对象级 backend audit
+   - 用 `10nm rerun` 那套可回对口径
+   - 主要检查：
+     - `missing`
+     - `extra`
+     - `mismatch`
+
+## Decision Rule
+
+以后判断一次 style 修改是否可信，按这个顺序：
+
+1. 修改 [`src/pbf/style.navsea-delivery-karatsu-10nm.json`](/root/sourceserver/pbf/src/pbf/style.navsea-delivery-karatsu-10nm.json)
+2. 部署到 `/mnt/sda1/www/newpec/domain/style.navsea-delivery-karatsu-10nm.json`
+3. 用固定页面肉眼看 3 个 pilot hotspots
+4. 跑一次：
+
+```bash
+python3 navsea_strict_audit.py \
+  --hotspots-json /root/sourceserver/pbf/strict_audit_hotspots_20nm_pilot.json \
+  --output-dir /root/sourceserver/pbf/report/strict_audit_pilot
+```
+
+5. 对热点里仍然不对的对象做点击拾取
+6. 再决定问题属于：
+   - style 表达式问题
+   - sprite / runtime 问题
+   - delivery PBF 语义字段不足，需要回 builder
+
+## Current Conclusion
+
+当前已经可以固定下来的东西是：
+
+- 视觉基线：
+  - `http://192.168.200.184/newpec/navsea-compare-karatsu-20nm.html`
+- style source of truth:
+  - [`src/pbf/style.navsea-delivery-karatsu-10nm.json`](/root/sourceserver/pbf/src/pbf/style.navsea-delivery-karatsu-10nm.json)
+- 小范围试验审计：
+  - [`strict_audit_hotspots_20nm_pilot.json`](/root/sourceserver/pbf/strict_audit_hotspots_20nm_pilot.json)
+- 可信方法：
+  - `20nm compare 肉眼审图 + 小范围 AOI 图像对比 + 点击拾取 + 10nm 对象级 backend audit`
+
+这套方法比“只看 20nm backend 总数”更可信，也比“只看整屏图像 diff”更可操作。

STEP_RECORD.md

@@ -887,6 +887,71 @@ Style 语义专项里仍最重要的是：
   - 严格对象级 render audit
   - 检查 `missing / extra / mismatch`
 
+## Small Scope Image Audit Pilot
+
+本轮已把“小范围图像对比测试”正式跑通，目的有两个：
+
+- 整理出当前继续收敛的唯一 `style.json`
+- 建立一个更可信的视觉审计方法
+
+当前固定的 style source of truth：
+
+- [`src/pbf/style.navsea-delivery-karatsu-10nm.json`](/root/sourceserver/pbf/src/pbf/style.navsea-delivery-karatsu-10nm.json)
+
+虽然名字里仍是 `10nm`，但当前 `20nm compare` 右侧实际就是用它，因此：
+
+- 后续继续收敛这一个 delivery style 文件
+- 不再新增新的主 delivery style 文件来分散口径
+
+本轮新增的小范围热点配置：
+
+- [`strict_audit_hotspots_20nm_pilot.json`](/root/sourceserver/pbf/strict_audit_hotspots_20nm_pilot.json)
+
+它只保留 3 个最代表当前问题的热点：
+
+1. `takashima_main_harbor_marks`
+2. `takashima_inner_nearshore_hazards`
+3. `east_breakwater_marks`
+
+试验版输出：
+
+- [`report/strict_audit_pilot/strict_audit_summary.md`](/root/sourceserver/pbf/report/strict_audit_pilot/strict_audit_summary.md)
+- [`report/strict_audit_pilot/strict_audit_summary.json`](/root/sourceserver/pbf/report/strict_audit_pilot/strict_audit_summary.json)
+- [`report/strict_audit_pilot/hotspots`](/root/sourceserver/pbf/report/strict_audit_pilot/hotspots)
+
+本轮 pilot 结果：
+
+- `takashima_main_harbor_marks`
+  - changed ratio: `0.783759`
+- `takashima_inner_nearshore_hazards`
+  - changed ratio: `0.744246`
+- `east_breakwater_marks`
+  - changed ratio: `0.617833`
+
+当前判断：
+
+- 这 3 个热点足够小，也足够稳定
+- 它们比整屏 diff 更适合指导 style 迭代
+- 其中：
+  - `takashima_main_harbor_marks` 适合作为第一主观察点
+  - `east_breakwater_marks` 适合作为回归保护点
+
+本轮也补了一份方法文档：
+
+- [`NavSea_20nm_Small_Scope_Audit_Method.md`](/root/sourceserver/pbf/NavSea_20nm_Small_Scope_Audit_Method.md)
+
+当前认可的“可信审计方法”是：
+
+- `20nm compare` 肉眼审图
+- 小范围 AOI 图像对比
+- compare 页点击拾取
+- `10nm rerun` 对象级 backend audit
+
+而不是：
+
+- 只看整屏图像 diff
+- 或只看 `20nm` backend 总量数字
+
 ## Quick Resume Prompt
 
 下次开机如果要快速接上，可以先看这份文件，再按下面这句继续：

report/strict_audit_pilot/strict_audit_summary.json

@@ -0,0 +1,323 @@
+{
+  "compare_url": "http://192.168.200.184/newpec/navsea-compare-karatsu-20nm.html",
+  "compare_version": "20nm-r7-20260331-2044",
+  "backend_audit_json": "/root/sourceserver/pbf/NavSea_Original_vs_Delivery_Render_Audit_Karatsu_20nm_2026-03-31.r7.json",
+  "visual_metrics": {
+    "image_width": 640,
+    "image_height": 400,
+    "total_pixels": 256000,
+    "changed_pixels": 230361,
+    "changed_ratio": 0.899848,
+    "mean_abs_rgb": [
+      27.394,
+      28.0012,
+      51.399
+    ],
+    "rms_rgb": [
+      42.1614,
+      40.8117,
+      66.9404
+    ],
+    "diff_bbox": [
+      0,
+      0,
+      640,
+      400
+    ],
+    "full_crop_left": [
+      0,
+      150,
+      640,
+      550
+    ],
+    "full_crop_right": [
+      640,
+      150,
+      1280,
+      550
+    ],
+    "hotspots": [
+      {
+        "image_width": 147,
+        "image_height": 80,
+        "total_pixels": 11760,
+        "changed_pixels": 9217,
+        "changed_ratio": 0.783759,
+        "mean_abs_rgb": [
+          25.8832,
+          26.3819,
+          35.8165
+        ],
+        "rms_rgb": [
+          40.7513,
+          43.6982,
+          55.4931
+        ],
+        "diff_bbox": [
+          0,
+          0,
+          147,
+          80
+        ],
+        "id": "takashima_main_harbor_marks",
+        "label": "高岛主港航标区",
+        "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"
+        ],
+        "pane_box_norm": [
+          0.34,
+          0.05,
+          0.57,
+          0.25
+        ],
+        "pane_box_pixels": [
+          218,
+          20,
+          365,
+          100
+        ],
+        "left_image": "/root/sourceserver/pbf/report/strict_audit_pilot/hotspots/takashima_main_harbor_marks_left.png",
+        "right_image": "/root/sourceserver/pbf/report/strict_audit_pilot/hotspots/takashima_main_harbor_marks_right.png",
+        "diff_image": "/root/sourceserver/pbf/report/strict_audit_pilot/hotspots/takashima_main_harbor_marks_diff.png"
+      },
+      {
+        "image_width": 115,
+        "image_height": 68,
+        "total_pixels": 7820,
+        "changed_pixels": 5820,
+        "changed_ratio": 0.744246,
+        "mean_abs_rgb": [
+          26.0925,
+          28.3926,
+          32.3252
+        ],
+        "rms_rgb": [
+          40.8552,
+          45.3891,
+          51.1523
+        ],
+        "diff_bbox": [
+          0,
+          0,
+          115,
+          68
+        ],
+        "id": "takashima_inner_nearshore_hazards",
+        "label": "高岛近岸碍航与鱼礁区",
+        "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"
+        ],
+        "pane_box_norm": [
+          0.44,
+          0.14,
+          0.62,
+          0.31
+        ],
+        "pane_box_pixels": [
+          282,
+          56,
+          397,
+          124
+        ],
+        "left_image": "/root/sourceserver/pbf/report/strict_audit_pilot/hotspots/takashima_inner_nearshore_hazards_left.png",
+        "right_image": "/root/sourceserver/pbf/report/strict_audit_pilot/hotspots/takashima_inner_nearshore_hazards_right.png",
+        "diff_image": "/root/sourceserver/pbf/report/strict_audit_pilot/hotspots/takashima_inner_nearshore_hazards_diff.png"
+      },
+      {
+        "image_width": 109,
+        "image_height": 64,
+        "total_pixels": 6976,
+        "changed_pixels": 4310,
+        "changed_ratio": 0.617833,
+        "mean_abs_rgb": [
+          14.5257,
+          14.9903,
+          20.7008
+        ],
+        "rms_rgb": [
+          30.1275,
+          32.1947,
+          39.6306
+        ],
+        "diff_bbox": [
+          0,
+          4,
+          109,
+          64
+        ],
+        "id": "east_breakwater_marks",
+        "label": "东侧防波堤灯台区",
+        "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"
+        ],
+        "pane_box_norm": [
+          0.83,
+          0.0,
+          1.0,
+          0.16
+        ],
+        "pane_box_pixels": [
+          531,
+          0,
+          640,
+          64
+        ],
+        "left_image": "/root/sourceserver/pbf/report/strict_audit_pilot/hotspots/east_breakwater_marks_left.png",
+        "right_image": "/root/sourceserver/pbf/report/strict_audit_pilot/hotspots/east_breakwater_marks_right.png",
+        "diff_image": "/root/sourceserver/pbf/report/strict_audit_pilot/hotspots/east_breakwater_marks_diff.png"
+      }
+    ]
+  },
+  "backend_summary": {
+    "original_feature_instances": 258317,
+    "engineering_feature_instances": 258317,
+    "result_count": 516634,
+    "status_counts": {
+      "extra_in_engineering": 258317,
+      "missing_in_engineering": 258317
+    },
+    "top_annotation_issues": [
+      {
+        "issue": "extra_text_in_engineering",
+        "source_layer": "bathymetry_line",
+        "count": 24168
+      },
+      {
+        "issue": "text_missing_in_engineering",
+        "source_layer": "L海底地形",
+        "count": 24168
+      },
+      {
+        "issue": "extra_text_in_engineering",
+        "source_layer": "depth_contour",
+        "count": 11929
+      },
+      {
+        "issue": "text_missing_in_engineering",
+        "source_layer": "L等深線",
+        "count": 11929
+      },
+      {
+        "issue": "extra_text_in_engineering",
+        "source_layer": "seabed_text_point",
+        "count": 4499
+      },
+      {
+        "issue": "text_missing_in_engineering",
+        "source_layer": "p底質",
+        "count": 4499
+      },
+      {
+        "issue": "extra_text_in_engineering",
+        "source_layer": "navigation_marks",
+        "count": 1516
+      },
+      {
+        "issue": "text_missing_in_engineering",
+        "source_layer": "p航路標識群",
+        "count": 1516
+      },
+      {
+        "issue": "text_missing_in_engineering",
+        "source_layer": "p地名",
+        "count": 1444
+      },
+      {
+        "issue": "extra_text_in_engineering",
+        "source_layer": "place_label_sea",
+        "count": 1444
+      }
+    ],
+    "top_style_semantic_issues": [
+      {
+        "issue": "depth_numeric_missing",
+        "source_layer": "L海底地形",
+        "count": 24168
+      },
+      {
+        "issue": "depth_numeric_missing",
+        "source_layer": "L等深線",
+        "count": 11929
+      },
+      {
+        "issue": "safety_icon_missing",
+        "source_layer": "p航路標識群",
+        "count": 1885
+      },
+      {
+        "issue": "depth_numeric_missing",
+        "source_layer": "L概略等深線",
+        "count": 350
+      },
+      {
+        "issue": "clearance_numeric_missing",
+        "source_layer": "p高さ制限",
+        "count": 33
+      }
+    ],
+    "top_source_layer_issues": [
+      {
+        "status": "extra_in_engineering",
+        "source_layer": "baseline_outline",
+        "count": 87709
+      },
+      {
+        "status": "missing_in_engineering",
+        "source_layer": "P基本線ククリ",
+        "count": 87709
+      },
+      {
+        "status": "extra_in_engineering",
+        "source_layer": "baseline_area",
+        "count": 50421
+      },
+      {
+        "status": "missing_in_engineering",
+        "source_layer": "P基本線",
+        "count": 50421
+      },
+      {
+        "status": "extra_in_engineering",
+        "source_layer": "depth_contour",
+        "count": 36460
+      },
+      {
+        "status": "missing_in_engineering",
+        "source_layer": "L等深線",
+        "count": 36460
+      },
+      {
+        "status": "extra_in_engineering",
+        "source_layer": "bathymetry_line",
+        "count": 35940
+      },
+      {
+        "status": "missing_in_engineering",
+        "source_layer": "L海底地形",
+        "count": 35940
+      },
+      {
+        "status": "extra_in_engineering",
+        "source_layer": "onshore_structure_line",
+        "count": 10544
+      },
+      {
+        "status": "missing_in_engineering",
+        "source_layer": "L陸上構造物陸",
+        "count": 10544
+      }
+    ]
+  },
+  "notes": [
+    "Visual metrics are browser-rendered screenshot diff metrics from the fixed compare page.",
+    "Backend metrics are current render-audit summary metrics and may remain blind to sprite-load failures."
+  ]
+}

report/strict_audit_pilot/strict_audit_summary.md

@@ -0,0 +1,104 @@
+# NavSea Strict Audit Summary
+
+## Scope
+
+- Compare page: `http://192.168.200.184/newpec/navsea-compare-karatsu-20nm.html`
+- Compare version: `20nm-r7-20260331-2044`
+- Backend render audit: `/root/sourceserver/pbf/NavSea_Original_vs_Delivery_Render_Audit_Karatsu_20nm_2026-03-31.r7.json`
+
+## Visual Audit
+
+- changed pixels: `230361` / `256000`
+- changed ratio: `0.899848`
+- mean abs rgb: `[27.394, 28.0012, 51.399]`
+- rms rgb: `[42.1614, 40.8117, 66.9404]`
+- left crop: `[0, 150, 640, 550]`
+- right crop: `[640, 150, 1280, 550]`
+
+Artifacts:
+
+- `/root/sourceserver/pbf/report/strict_audit_pilot/compare_full.png`
+- `/root/sourceserver/pbf/report/strict_audit_pilot/compare_left.png`
+- `/root/sourceserver/pbf/report/strict_audit_pilot/compare_right.png`
+- `/root/sourceserver/pbf/report/strict_audit_pilot/compare_diff.png`
+
+## Hotspot AOI Audit
+
+### 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: `9217` / `11760`
+- changed ratio: `0.783759`
+- mean abs rgb: `[25.8832, 26.3819, 35.8165]`
+- pane box norm: `[0.34, 0.05, 0.57, 0.25]`
+- pane box pixels: `[218, 20, 365, 100]`
+- left image: `/root/sourceserver/pbf/report/strict_audit_pilot/hotspots/takashima_main_harbor_marks_left.png`
+- right image: `/root/sourceserver/pbf/report/strict_audit_pilot/hotspots/takashima_main_harbor_marks_right.png`
+- diff image: `/root/sourceserver/pbf/report/strict_audit_pilot/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: `5820` / `7820`
+- changed ratio: `0.744246`
+- mean abs rgb: `[26.0925, 28.3926, 32.3252]`
+- pane box norm: `[0.44, 0.14, 0.62, 0.31]`
+- pane box pixels: `[282, 56, 397, 124]`
+- left image: `/root/sourceserver/pbf/report/strict_audit_pilot/hotspots/takashima_inner_nearshore_hazards_left.png`
+- right image: `/root/sourceserver/pbf/report/strict_audit_pilot/hotspots/takashima_inner_nearshore_hazards_right.png`
+- diff image: `/root/sourceserver/pbf/report/strict_audit_pilot/hotspots/takashima_inner_nearshore_hazards_diff.png`
+
+### 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: `4310` / `6976`
+- changed ratio: `0.617833`
+- mean abs rgb: `[14.5257, 14.9903, 20.7008]`
+- pane box norm: `[0.83, 0.0, 1.0, 0.16]`
+- pane box pixels: `[531, 0, 640, 64]`
+- left image: `/root/sourceserver/pbf/report/strict_audit_pilot/hotspots/east_breakwater_marks_left.png`
+- right image: `/root/sourceserver/pbf/report/strict_audit_pilot/hotspots/east_breakwater_marks_right.png`
+- diff image: `/root/sourceserver/pbf/report/strict_audit_pilot/hotspots/east_breakwater_marks_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.

strict_audit_hotspots_20nm_pilot.json

@@ -0,0 +1,34 @@
+[
+  {
+    "id": "takashima_main_harbor_marks",
+    "label": "高岛主港航标区",
+    "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。",
+    "pane_box_norm": [0.34, 0.05, 0.57, 0.25],
+    "backend_focus": [
+      "p航路標識群",
+      "safety_icon_missing",
+      "text_missing_in_engineering"
+    ]
+  },
+  {
+    "id": "takashima_inner_nearshore_hazards",
+    "label": "高岛近岸碍航与鱼礁区",
+    "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。",
+    "pane_box_norm": [0.44, 0.14, 0.62, 0.31],
+    "backend_focus": [
+      "p投錨注意障害物",
+      "p航行危険障害物",
+      "p航路標識群"
+    ]
+  },
+  {
+    "id": "east_breakwater_marks",
+    "label": "东侧防波堤灯台区",
+    "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。",
+    "pane_box_norm": [0.83, 0.0, 1.0, 0.16],
+    "backend_focus": [
+      "p航路標識群",
+      "safety_icon_missing"
+    ]
+  }
+]