diff --git a/docs/evidence/issue-9-dashboard-menu-transition/README.md b/docs/evidence/issue-9-dashboard-menu-transition/README.md
index d3d2a29..bba48c3 100644
--- a/docs/evidence/issue-9-dashboard-menu-transition/README.md
+++ b/docs/evidence/issue-9-dashboard-menu-transition/README.md
@@ -1,31 +1,32 @@
 # Issue #9 authenticated browser evidence
 
-This directory binds the dashboard menu-transition acceptance evidence to the exact working-tree files listed in `manifest.json`.
+This directory binds the dashboard menu-transition acceptance evidence to the exact Git head and working-tree files listed in `manifest.json`.
 
 ## Captured transition
 
 - **Path:** `요약` → `분류 규칙`
 - **Input:** native Streamlit menu click in an authenticated HTTPS browser session
 - **Fixture:** generated synthetic SQLite database only
-- **Sampling:** 35 DOM/style frames at 50 ms intervals
+- **Sampling:** 35 DOM/computed-style frames at 50 ms intervals
 - **Viewport:** 1280 × 720
-- **Browser:** Headless Chrome 154 on Linux x86_64
+- **Browser:** Headless Chrome 154; Client Hints architecture `arm`, bitness `64`
 - **Fixture host:** Linux aarch64, Python 3.13.5, Streamlit 1.58.0, Uvicorn 0.49.0
 
 ## Verified browser observations
 
-All eight manifest checks are true:
+All twelve manifest checks are true:
 
-- the HTML document marker stayed identical;
-- the sidebar marker stayed identical;
-- the page background stayed identical;
-- no post-click full-document `load` event occurred;
-- the target loading state was observed;
+- the HTML document and sidebar markers stayed identical;
+- `[data-testid="stAppViewContainer"]` retained a non-`none` computed `backgroundImage` and remained visible/rendered in every frame;
+- `[data-testid="stSidebar"]` retained a non-`none` computed `backgroundImage` and remained visible/rendered in every frame;
+- computed `backgroundImage`, `backgroundColor`, `visibility`, `display`, `opacity`, and rendered geometry were captured for both surfaces in every frame;
+- the click and all 35 frames completed inside one uninterrupted Playwright evaluation context, so no full-document navigation occurred;
+- the target loading state was observed in two frames;
 - the previous `요약` body was absent in every loading frame;
-- the unrelated `fixture=preserved` query key survived;
+- the unrelated `source=evidence` query key survived;
 - final URL, selected menu, target body, and cleared loading state agreed.
 
-`browser-observations.json` contains every sampled frame, body hashes, URL state, history events, document/sidebar markers, computed background, runtime metadata, and explicit limitations. `final-state.jpg` is the final visible browser state; it contains no credential or secret.
+`browser-observations.json` contains every frame, body hashes, URL state, markers, computed surface styles, runtime metadata, and explicit limitations. `final-state.jpg` is the final visible browser state and contains no credential or secret.
 
 ## Recheck
 
@@ -33,15 +34,14 @@ Run the exact validator recorded in `manifest.json`. The captured result was:
 
 ```text
 exit code: 0
-PASS source_hashes=5 artifact_hashes=2 checks=8/8 frames=35 full_document_loads=0
+PASS source_hashes=5 artifact_hashes=2 checks=12/12 frames=35 full_document_loads=0 surfaces=2
 ```
 
-The browser action was executed through `mcp__playwright__browser_run_code_unsafe`. That API reports success/error rather than a numeric process exit code; this boundary is explicit in the manifest instead of being represented as a fabricated exit status.
+The browser actions used Playwright MCP. That API reports success/error rather than a numeric process exit code; the manifest records this boundary instead of fabricating an exit status.
 
 ## Evidence boundaries
 
 - This is synthetic-fixture browser evidence, not operating-ledger evidence.
-- A fixture-only external wrapper delayed the rules renderer by two seconds so the loading interval could be sampled. It did not alter repository source.
-- A temporary HTTPS ingress adapter supplied trusted proxy scheme/Host metadata. Repository authentication and same-origin enforcement remained active.
-- The tunnel URL is intentionally ephemeral and is retained in the frame record only for provenance.
+- A temporary HTTPS ingress adapter normalized the request scheme. Repository authentication and same-origin enforcement remained active.
+- The tunnel URL is intentionally ephemeral and retained only as provenance.
 - The screenshot supplements, but does not replace, the machine-readable continuous-frame observations.
diff --git a/docs/evidence/issue-9-dashboard-menu-transition/browser-observations.json b/docs/evidence/issue-9-dashboard-menu-transition/browser-observations.json
index c84762f..8a18ae4 100644
--- a/docs/evidence/issue-9-dashboard-menu-transition/browser-observations.json
+++ b/docs/evidence/issue-9-dashboard-menu-transition/browser-observations.json
@@ -1,988 +1,1643 @@
 {
-  "schema": "jarca.issue9.browser-transition.v1",
+  "schema": "jarca.issue9.browser-transition.v2",
   "source": "authenticated Playwright browser runner through temporary HTTPS fixture ingress",
+  "captured_at": "2026-10-05T08:17:17.108Z",
   "from_page": "요약",
   "to_page": "분류 규칙",
   "pre": {
     "elapsed_ms": 0,
-    "url": "https://d54e2eeaa8e50e2b-211-109-75-114.serveousercontent.com/?page=%EC%9A%94%EC%95%BD&fixture=preserved",
+    "url": "https://bb8d254926f5fd.lhr.life/?page=%EC%9A%94%EC%95%BD&source=evidence",
     "query_page": "요약",
-    "sibling_value": "preserved",
+    "sibling_source": "evidence",
     "selected": "요약",
     "loading": false,
     "previous_body_visible": true,
     "target_body_visible": false,
-    "body_sha256": "64d8cf1234afc84635c58b9ec964b2573fd8bea12dfd107e82086cc20f6b16f3",
-    "document_marker": "issue9-document-marker",
-    "sidebar_marker": "issue9-sidebar-marker",
+    "body_sha256": "fe2152704a93e27f9142fee10ef4963d98bc282fc30ee2713d3f34d7b47aca49",
+    "document_marker": "c830670d-8588-4000-9e30-10bc0a6bfe1a",
+    "sidebar_marker": "fb10199d-796c-4fe1-8eff-571ad06c0224",
     "background": "rgb(255, 255, 255)",
-    "history_events": [],
+    "surfaces": {
+      "stAppViewContainer": {
+        "backgroundImage": "radial-gradient(circle at 0% 0%, rgba(37, 99, 235, 0.1), rgba(0, 0, 0, 0) 480px), radial-gradient(circle at 100% 0%, rgba(6, 182, 212, 0.1), rgba(0, 0, 0, 0) 448px), linear-gradient(rgb(248, 250, 252) 0%, rgb(255, 255, 255) 45%, rgb(248, 250, 252) 100%)",
+        "backgroundColor": "rgba(0, 0, 0, 0)",
+        "visibility": "visible",
+        "display": "flex",
+        "opacity": "1",
+        "rendered": true
+      },
+      "stSidebar": {
+        "backgroundImage": "linear-gradient(rgb(255, 255, 255) 0%, rgb(248, 250, 252) 100%)",
+        "backgroundColor": "rgba(0, 0, 0, 0)",
+        "visibility": "visible",
+        "display": "block",
+        "opacity": "1",
+        "rendered": true
+      }
+    },
     "viewport": {
       "width": 1280,
       "height": 720
     },
     "user_agent": "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/154.0.0.0 Safari/537.36",
-    "architecture": "Linux x86_64"
+    "architecture": {
+      "client_hint_architecture": "arm",
+      "client_hint_bitness": "64",
+      "navigator_platform": "Linux x86_64"
+    }
   },
   "frames": [
     {
-      "elapsed_ms": 134,
-      "url": "https://d54e2eeaa8e50e2b-211-109-75-114.serveousercontent.com/?page=%EC%9A%94%EC%95%BD&fixture=preserved",
+      "elapsed_ms": 0,
+      "url": "https://bb8d254926f5fd.lhr.life/?page=%EC%9A%94%EC%95%BD&source=evidence",
       "query_page": "요약",
-      "sibling_value": "preserved",
-      "selected": "분류 규칙",
+      "sibling_source": "evidence",
+      "selected": "요약",
       "loading": false,
       "previous_body_visible": true,
       "target_body_visible": false,
-      "body_sha256": "64d8cf1234afc84635c58b9ec964b2573fd8bea12dfd107e82086cc20f6b16f3",
-      "document_marker": "issue9-document-marker",
-      "sidebar_marker": "issue9-sidebar-marker",
+      "body_sha256": "fe2152704a93e27f9142fee10ef4963d98bc282fc30ee2713d3f34d7b47aca49",
+      "document_marker": "c830670d-8588-4000-9e30-10bc0a6bfe1a",
+      "sidebar_marker": "fb10199d-796c-4fe1-8eff-571ad06c0224",
       "background": "rgb(255, 255, 255)",
-      "history_events": [],
+      "surfaces": {
+        "stAppViewContainer": {
+          "backgroundImage": "radial-gradient(circle at 0% 0%, rgba(37, 99, 235, 0.1), rgba(0, 0, 0, 0) 480px), radial-gradient(circle at 100% 0%, rgba(6, 182, 212, 0.1), rgba(0, 0, 0, 0) 448px), linear-gradient(rgb(248, 250, 252) 0%, rgb(255, 255, 255) 45%, rgb(248, 250, 252) 100%)",
+          "backgroundColor": "rgba(0, 0, 0, 0)",
+          "visibility": "visible",
+          "display": "flex",
+          "opacity": "1",
+          "rendered": true
+        },
+        "stSidebar": {
+          "backgroundImage": "linear-gradient(rgb(255, 255, 255) 0%, rgb(248, 250, 252) 100%)",
+          "backgroundColor": "rgba(0, 0, 0, 0)",
+          "visibility": "visible",
+          "display": "block",
+          "opacity": "1",
+          "rendered": true
+        }
+      },
       "viewport": {
         "width": 1280,
         "height": 720
       },
       "user_agent": "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/154.0.0.0 Safari/537.36",
-      "architecture": "Linux x86_64"
+      "architecture": {
+        "client_hint_architecture": "arm",
+        "client_hint_bitness": "64",
+        "navigator_platform": "Linux x86_64"
+      }
     },
     {
-      "elapsed_ms": 296,
-      "url": "https://d54e2eeaa8e50e2b-211-109-75-114.serveousercontent.com/?page=%EC%9A%94%EC%95%BD&fixture=preserved",
+      "elapsed_ms": 50,
+      "url": "https://bb8d254926f5fd.lhr.life/?page=%EC%9A%94%EC%95%BD&source=evidence",
       "query_page": "요약",
-      "sibling_value": "preserved",
+      "sibling_source": "evidence",
       "selected": "분류 규칙",
       "loading": false,
       "previous_body_visible": true,
       "target_body_visible": false,
-      "body_sha256": "64d8cf1234afc84635c58b9ec964b2573fd8bea12dfd107e82086cc20f6b16f3",
-      "document_marker": "issue9-document-marker",
-      "sidebar_marker": "issue9-sidebar-marker",
+      "body_sha256": "fe2152704a93e27f9142fee10ef4963d98bc282fc30ee2713d3f34d7b47aca49",
+      "document_marker": "c830670d-8588-4000-9e30-10bc0a6bfe1a",
+      "sidebar_marker": "fb10199d-796c-4fe1-8eff-571ad06c0224",
       "background": "rgb(255, 255, 255)",
-      "history_events": [],
+      "surfaces": {
+        "stAppViewContainer": {
+          "backgroundImage": "radial-gradient(circle at 0% 0%, rgba(37, 99, 235, 0.1), rgba(0, 0, 0, 0) 480px), radial-gradient(circle at 100% 0%, rgba(6, 182, 212, 0.1), rgba(0, 0, 0, 0) 448px), linear-gradient(rgb(248, 250, 252) 0%, rgb(255, 255, 255) 45%, rgb(248, 250, 252) 100%)",
+          "backgroundColor": "rgba(0, 0, 0, 0)",
+          "visibility": "visible",
+          "display": "flex",
+          "opacity": "1",
+          "rendered": true
+        },
+        "stSidebar": {
+          "backgroundImage": "linear-gradient(rgb(255, 255, 255) 0%, rgb(248, 250, 252) 100%)",
+          "backgroundColor": "rgba(0, 0, 0, 0)",
+          "visibility": "visible",
+          "display": "block",
+          "opacity": "1",
+          "rendered": true
+        }
+      },
       "viewport": {
         "width": 1280,
         "height": 720
       },
       "user_agent": "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/154.0.0.0 Safari/537.36",
-      "architecture": "Linux x86_64"
+      "architecture": {
+        "client_hint_architecture": "arm",
+        "client_hint_bitness": "64",
+        "navigator_platform": "Linux x86_64"
+      }
     },
     {
-      "elapsed_ms": 374,
-      "url": "https://d54e2eeaa8e50e2b-211-109-75-114.serveousercontent.com/?page=%EC%9A%94%EC%95%BD&fixture=preserved",
+      "elapsed_ms": 100,
+      "url": "https://bb8d254926f5fd.lhr.life/?page=%EC%9A%94%EC%95%BD&source=evidence",
       "query_page": "요약",
-      "sibling_value": "preserved",
+      "sibling_source": "evidence",
       "selected": "분류 규칙",
       "loading": false,
       "previous_body_visible": true,
       "target_body_visible": false,
-      "body_sha256": "64d8cf1234afc84635c58b9ec964b2573fd8bea12dfd107e82086cc20f6b16f3",
-      "document_marker": "issue9-document-marker",
-      "sidebar_marker": "issue9-sidebar-marker",
+      "body_sha256": "fe2152704a93e27f9142fee10ef4963d98bc282fc30ee2713d3f34d7b47aca49",
+      "document_marker": "c830670d-8588-4000-9e30-10bc0a6bfe1a",
+      "sidebar_marker": "fb10199d-796c-4fe1-8eff-571ad06c0224",
       "background": "rgb(255, 255, 255)",
-      "history_events": [],
+      "surfaces": {
+        "stAppViewContainer": {
+          "backgroundImage": "radial-gradient(circle at 0% 0%, rgba(37, 99, 235, 0.1), rgba(0, 0, 0, 0) 480px), radial-gradient(circle at 100% 0%, rgba(6, 182, 212, 0.1), rgba(0, 0, 0, 0) 448px), linear-gradient(rgb(248, 250, 252) 0%, rgb(255, 255, 255) 45%, rgb(248, 250, 252) 100%)",
+          "backgroundColor": "rgba(0, 0, 0, 0)",
+          "visibility": "visible",
+          "display": "flex",
+          "opacity": "1",
+          "rendered": true
+        },
+        "stSidebar": {
+          "backgroundImage": "linear-gradient(rgb(255, 255, 255) 0%, rgb(248, 250, 252) 100%)",
+          "backgroundColor": "rgba(0, 0, 0, 0)",
+          "visibility": "visible",
+          "display": "block",
+          "opacity": "1",
+          "rendered": true
+        }
+      },
       "viewport": {
         "width": 1280,
         "height": 720
       },
       "user_agent": "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/154.0.0.0 Safari/537.36",
-      "architecture": "Linux x86_64"
+      "architecture": {
+        "client_hint_architecture": "arm",
+        "client_hint_bitness": "64",
+        "navigator_platform": "Linux x86_64"
+      }
     },
     {
-      "elapsed_ms": 442,
-      "url": "https://d54e2eeaa8e50e2b-211-109-75-114.serveousercontent.com/?page=%EC%9A%94%EC%95%BD&fixture=preserved",
+      "elapsed_ms": 150,
+      "url": "https://bb8d254926f5fd.lhr.life/?page=%EC%9A%94%EC%95%BD&source=evidence",
       "query_page": "요약",
-      "sibling_value": "preserved",
+      "sibling_source": "evidence",
       "selected": "분류 규칙",
       "loading": false,
       "previous_body_visible": true,
       "target_body_visible": false,
-      "body_sha256": "64d8cf1234afc84635c58b9ec964b2573fd8bea12dfd107e82086cc20f6b16f3",
-      "document_marker": "issue9-document-marker",
-      "sidebar_marker": "issue9-sidebar-marker",
+      "body_sha256": "fe2152704a93e27f9142fee10ef4963d98bc282fc30ee2713d3f34d7b47aca49",
+      "document_marker": "c830670d-8588-4000-9e30-10bc0a6bfe1a",
+      "sidebar_marker": "fb10199d-796c-4fe1-8eff-571ad06c0224",
       "background": "rgb(255, 255, 255)",
-      "history_events": [],
+      "surfaces": {
+        "stAppViewContainer": {
+          "backgroundImage": "radial-gradient(circle at 0% 0%, rgba(37, 99, 235, 0.1), rgba(0, 0, 0, 0) 480px), radial-gradient(circle at 100% 0%, rgba(6, 182, 212, 0.1), rgba(0, 0, 0, 0) 448px), linear-gradient(rgb(248, 250, 252) 0%, rgb(255, 255, 255) 45%, rgb(248, 250, 252) 100%)",
+          "backgroundColor": "rgba(0, 0, 0, 0)",
+          "visibility": "visible",
+          "display": "flex",
+          "opacity": "1",
+          "rendered": true
+        },
+        "stSidebar": {
+          "backgroundImage": "linear-gradient(rgb(255, 255, 255) 0%, rgb(248, 250, 252) 100%)",
+          "backgroundColor": "rgba(0, 0, 0, 0)",
+          "visibility": "visible",
+          "display": "block",
+          "opacity": "1",
+          "rendered": true
+        }
+      },
       "viewport": {
         "width": 1280,
         "height": 720
       },
       "user_agent": "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/154.0.0.0 Safari/537.36",
-      "architecture": "Linux x86_64"
+      "architecture": {
+        "client_hint_architecture": "arm",
+        "client_hint_bitness": "64",
+        "navigator_platform": "Linux x86_64"
+      }
     },
     {
-      "elapsed_ms": 520,
-      "url": "https://d54e2eeaa8e50e2b-211-109-75-114.serveousercontent.com/?page=%EC%9A%94%EC%95%BD&fixture=preserved",
+      "elapsed_ms": 200,
+      "url": "https://bb8d254926f5fd.lhr.life/?page=%EC%9A%94%EC%95%BD&source=evidence",
       "query_page": "요약",
-      "sibling_value": "preserved",
+      "sibling_source": "evidence",
       "selected": "분류 규칙",
       "loading": false,
       "previous_body_visible": true,
       "target_body_visible": false,
-      "body_sha256": "64d8cf1234afc84635c58b9ec964b2573fd8bea12dfd107e82086cc20f6b16f3",
-      "document_marker": "issue9-document-marker",
-      "sidebar_marker": "issue9-sidebar-marker",
+      "body_sha256": "fe2152704a93e27f9142fee10ef4963d98bc282fc30ee2713d3f34d7b47aca49",
+      "document_marker": "c830670d-8588-4000-9e30-10bc0a6bfe1a",
+      "sidebar_marker": "fb10199d-796c-4fe1-8eff-571ad06c0224",
       "background": "rgb(255, 255, 255)",
-      "history_events": [],
+      "surfaces": {
+        "stAppViewContainer": {
+          "backgroundImage": "radial-gradient(circle at 0% 0%, rgba(37, 99, 235, 0.1), rgba(0, 0, 0, 0) 480px), radial-gradient(circle at 100% 0%, rgba(6, 182, 212, 0.1), rgba(0, 0, 0, 0) 448px), linear-gradient(rgb(248, 250, 252) 0%, rgb(255, 255, 255) 45%, rgb(248, 250, 252) 100%)",
+          "backgroundColor": "rgba(0, 0, 0, 0)",
+          "visibility": "visible",
+          "display": "flex",
+          "opacity": "1",
+          "rendered": true
+        },
+        "stSidebar": {
+          "backgroundImage": "linear-gradient(rgb(255, 255, 255) 0%, rgb(248, 250, 252) 100%)",
+          "backgroundColor": "rgba(0, 0, 0, 0)",
+          "visibility": "visible",
+          "display": "block",
+          "opacity": "1",
+          "rendered": true
+        }
+      },
       "viewport": {
         "width": 1280,
         "height": 720
       },
       "user_agent": "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/154.0.0.0 Safari/537.36",
-      "architecture": "Linux x86_64"
+      "architecture": {
+        "client_hint_architecture": "arm",
+        "client_hint_bitness": "64",
+        "navigator_platform": "Linux x86_64"
+      }
+    },
+    {
+      "elapsed_ms": 250,
+      "url": "https://bb8d254926f5fd.lhr.life/?page=%EC%9A%94%EC%95%BD&source=evidence",
+      "query_page": "요약",
+      "sibling_source": "evidence",
+      "selected": "분류 규칙",
+      "loading": false,
+      "previous_body_visible": true,
+      "target_body_visible": false,
+      "body_sha256": "fe2152704a93e27f9142fee10ef4963d98bc282fc30ee2713d3f34d7b47aca49",
+      "document_marker": "c830670d-8588-4000-9e30-10bc0a6bfe1a",
+      "sidebar_marker": "fb10199d-796c-4fe1-8eff-571ad06c0224",
+      "background": "rgb(255, 255, 255)",
+      "surfaces": {
+        "stAppViewContainer": {
+          "backgroundImage": "radial-gradient(circle at 0% 0%, rgba(37, 99, 235, 0.1), rgba(0, 0, 0, 0) 480px), radial-gradient(circle at 100% 0%, rgba(6, 182, 212, 0.1), rgba(0, 0, 0, 0) 448px), linear-gradient(rgb(248, 250, 252) 0%, rgb(255, 255, 255) 45%, rgb(248, 250, 252) 100%)",
+          "backgroundColor": "rgba(0, 0, 0, 0)",
+          "visibility": "visible",
+          "display": "flex",
+          "opacity": "1",
+          "rendered": true
+        },
+        "stSidebar": {
+          "backgroundImage": "linear-gradient(rgb(255, 255, 255) 0%, rgb(248, 250, 252) 100%)",
+          "backgroundColor": "rgba(0, 0, 0, 0)",
+          "visibility": "visible",
+          "display": "block",
+          "opacity": "1",
+          "rendered": true
+        }
+      },
+      "viewport": {
+        "width": 1280,
+        "height": 720
+      },
+      "user_agent": "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/154.0.0.0 Safari/537.36",
+      "architecture": {
+        "client_hint_architecture": "arm",
+        "client_hint_bitness": "64",
+        "navigator_platform": "Linux x86_64"
+      }
+    },
+    {
+      "elapsed_ms": 300,
+      "url": "https://bb8d254926f5fd.lhr.life/?page=%EC%9A%94%EC%95%BD&source=evidence",
+      "query_page": "요약",
+      "sibling_source": "evidence",
+      "selected": "분류 규칙",
+      "loading": false,
+      "previous_body_visible": true,
+      "target_body_visible": false,
+      "body_sha256": "fe2152704a93e27f9142fee10ef4963d98bc282fc30ee2713d3f34d7b47aca49",
+      "document_marker": "c830670d-8588-4000-9e30-10bc0a6bfe1a",
+      "sidebar_marker": "fb10199d-796c-4fe1-8eff-571ad06c0224",
+      "background": "rgb(255, 255, 255)",
+      "surfaces": {
+        "stAppViewContainer": {
+          "backgroundImage": "radial-gradient(circle at 0% 0%, rgba(37, 99, 235, 0.1), rgba(0, 0, 0, 0) 480px), radial-gradient(circle at 100% 0%, rgba(6, 182, 212, 0.1), rgba(0, 0, 0, 0) 448px), linear-gradient(rgb(248, 250, 252) 0%, rgb(255, 255, 255) 45%, rgb(248, 250, 252) 100%)",
+          "backgroundColor": "rgba(0, 0, 0, 0)",
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+      "user_agent": "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/154.0.0.0 Safari/537.36",
+      "architecture": {
+        "client_hint_architecture": "arm",
+        "client_hint_bitness": "64",
+        "navigator_platform": "Linux x86_64"
+      }
+    },
+    {
+      "elapsed_ms": 1600,
+      "url": "https://bb8d254926f5fd.lhr.life/?page=%EB%B6%84%EB%A5%98+%EA%B7%9C%EC%B9%99&source=evidence",
+      "query_page": "분류 규칙",
+      "sibling_source": "evidence",
+      "selected": "분류 규칙",
+      "loading": false,
+      "previous_body_visible": false,
+      "target_body_visible": true,
+      "body_sha256": "87ecc82dee8866b103ec07702108a8d00ce460ff2739e4521ca6742aa6f80f60",
+      "document_marker": "c830670d-8588-4000-9e30-10bc0a6bfe1a",
+      "sidebar_marker": "fb10199d-796c-4fe1-8eff-571ad06c0224",
+      "background": "rgb(255, 255, 255)",
+      "surfaces": {
+        "stAppViewContainer": {
+          "backgroundImage": "radial-gradient(circle at 0% 0%, rgba(37, 99, 235, 0.1), rgba(0, 0, 0, 0) 480px), radial-gradient(circle at 100% 0%, rgba(6, 182, 212, 0.1), rgba(0, 0, 0, 0) 448px), linear-gradient(rgb(248, 250, 252) 0%, rgb(255, 255, 255) 45%, rgb(248, 250, 252) 100%)",
+          "backgroundColor": "rgba(0, 0, 0, 0)",
+          "visibility": "visible",
+          "display": "flex",
+          "opacity": "1",
+          "rendered": true
+        },
+        "stSidebar": {
+          "backgroundImage": "linear-gradient(rgb(255, 255, 255) 0%, rgb(248, 250, 252) 100%)",
+          "backgroundColor": "rgba(0, 0, 0, 0)",
+          "visibility": "visible",
+          "display": "block",
+          "opacity": "1",
+          "rendered": true
+        }
+      },
+      "viewport": {
+        "width": 1280,
+        "height": 720
+      },
+      "user_agent": "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/154.0.0.0 Safari/537.36",
+      "architecture": {
+        "client_hint_architecture": "arm",
+        "client_hint_bitness": "64",
+        "navigator_platform": "Linux x86_64"
+      }
+    },
+    {
+      "elapsed_ms": 1650,
+      "url": "https://bb8d254926f5fd.lhr.life/?page=%EB%B6%84%EB%A5%98+%EA%B7%9C%EC%B9%99&source=evidence",
+      "query_page": "분류 규칙",
+      "sibling_source": "evidence",
+      "selected": "분류 규칙",
+      "loading": false,
+      "previous_body_visible": false,
+      "target_body_visible": true,
+      "body_sha256": "87ecc82dee8866b103ec07702108a8d00ce460ff2739e4521ca6742aa6f80f60",
+      "document_marker": "c830670d-8588-4000-9e30-10bc0a6bfe1a",
+      "sidebar_marker": "fb10199d-796c-4fe1-8eff-571ad06c0224",
+      "background": "rgb(255, 255, 255)",
+      "surfaces": {
+        "stAppViewContainer": {
+          "backgroundImage": "radial-gradient(circle at 0% 0%, rgba(37, 99, 235, 0.1), rgba(0, 0, 0, 0) 480px), radial-gradient(circle at 100% 0%, rgba(6, 182, 212, 0.1), rgba(0, 0, 0, 0) 448px), linear-gradient(rgb(248, 250, 252) 0%, rgb(255, 255, 255) 45%, rgb(248, 250, 252) 100%)",
+          "backgroundColor": "rgba(0, 0, 0, 0)",
+          "visibility": "visible",
+          "display": "flex",
+          "opacity": "1",
+          "rendered": true
+        },
+        "stSidebar": {
+          "backgroundImage": "linear-gradient(rgb(255, 255, 255) 0%, rgb(248, 250, 252) 100%)",
+          "backgroundColor": "rgba(0, 0, 0, 0)",
+          "visibility": "visible",
+          "display": "block",
+          "opacity": "1",
+          "rendered": true
+        }
+      },
+      "viewport": {
+        "width": 1280,
+        "height": 720
+      },
+      "user_agent": "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/154.0.0.0 Safari/537.36",
+      "architecture": {
+        "client_hint_architecture": "arm",
+        "client_hint_bitness": "64",
+        "navigator_platform": "Linux x86_64"
+      }
+    },
+    {
+      "elapsed_ms": 1700,
+      "url": "https://bb8d254926f5fd.lhr.life/?page=%EB%B6%84%EB%A5%98+%EA%B7%9C%EC%B9%99&source=evidence",
+      "query_page": "분류 규칙",
+      "sibling_source": "evidence",
+      "selected": "분류 규칙",
+      "loading": false,
+      "previous_body_visible": false,
+      "target_body_visible": true,
+      "body_sha256": "87ecc82dee8866b103ec07702108a8d00ce460ff2739e4521ca6742aa6f80f60",
+      "document_marker": "c830670d-8588-4000-9e30-10bc0a6bfe1a",
+      "sidebar_marker": "fb10199d-796c-4fe1-8eff-571ad06c0224",
+      "background": "rgb(255, 255, 255)",
+      "surfaces": {
+        "stAppViewContainer": {
+          "backgroundImage": "radial-gradient(circle at 0% 0%, rgba(37, 99, 235, 0.1), rgba(0, 0, 0, 0) 480px), radial-gradient(circle at 100% 0%, rgba(6, 182, 212, 0.1), rgba(0, 0, 0, 0) 448px), linear-gradient(rgb(248, 250, 252) 0%, rgb(255, 255, 255) 45%, rgb(248, 250, 252) 100%)",
+          "backgroundColor": "rgba(0, 0, 0, 0)",
+          "visibility": "visible",
+          "display": "flex",
+          "opacity": "1",
+          "rendered": true
+        },
+        "stSidebar": {
+          "backgroundImage": "linear-gradient(rgb(255, 255, 255) 0%, rgb(248, 250, 252) 100%)",
+          "backgroundColor": "rgba(0, 0, 0, 0)",
+          "visibility": "visible",
+          "display": "block",
+          "opacity": "1",
+          "rendered": true
+        }
+      },
+      "viewport": {
+        "width": 1280,
+        "height": 720
+      },
+      "user_agent": "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/154.0.0.0 Safari/537.36",
+      "architecture": {
+        "client_hint_architecture": "arm",
+        "client_hint_bitness": "64",
+        "navigator_platform": "Linux x86_64"
+      }
     }
   ],
   "post": {
-    "elapsed_ms": 6134,
-    "url": "https://d54e2eeaa8e50e2b-211-109-75-114.serveousercontent.com/?page=%EB%B6%84%EB%A5%98+%EA%B7%9C%EC%B9%99&fixture=preserved",
+    "elapsed_ms": 1700,
+    "url": "https://bb8d254926f5fd.lhr.life/?page=%EB%B6%84%EB%A5%98+%EA%B7%9C%EC%B9%99&source=evidence",
     "query_page": "분류 규칙",
-    "sibling_value": "preserved",
+    "sibling_source": "evidence",
     "selected": "분류 규칙",
     "loading": false,
     "previous_body_visible": false,
     "target_body_visible": true,
-    "body_sha256": "f5c040f5f42490cba765987c8b849ea41ee248ed1b403f2dc890b2b27a73dad9",
-    "document_marker": "issue9-document-marker",
-    "sidebar_marker": "issue9-sidebar-marker",
+    "body_sha256": "87ecc82dee8866b103ec07702108a8d00ce460ff2739e4521ca6742aa6f80f60",
+    "document_marker": "c830670d-8588-4000-9e30-10bc0a6bfe1a",
+    "sidebar_marker": "fb10199d-796c-4fe1-8eff-571ad06c0224",
     "background": "rgb(255, 255, 255)",
-    "history_events": [
-      {
-        "type": "pushState",
-        "url": "/?page=%EB%B6%84%EB%A5%98+%EA%B7%9C%EC%B9%99&fixture=preserved",
-        "at": 1791130693754
+    "surfaces": {
+      "stAppViewContainer": {
+        "backgroundImage": "radial-gradient(circle at 0% 0%, rgba(37, 99, 235, 0.1), rgba(0, 0, 0, 0) 480px), radial-gradient(circle at 100% 0%, rgba(6, 182, 212, 0.1), rgba(0, 0, 0, 0) 448px), linear-gradient(rgb(248, 250, 252) 0%, rgb(255, 255, 255) 45%, rgb(248, 250, 252) 100%)",
+        "backgroundColor": "rgba(0, 0, 0, 0)",
+        "visibility": "visible",
+        "display": "flex",
+        "opacity": "1",
+        "rendered": true
+      },
+      "stSidebar": {
+        "backgroundImage": "linear-gradient(rgb(255, 255, 255) 0%, rgb(248, 250, 252) 100%)",
+        "backgroundColor": "rgba(0, 0, 0, 0)",
+        "visibility": "visible",
+        "display": "block",
+        "opacity": "1",
+        "rendered": true
       }
-    ],
+    },
     "viewport": {
       "width": 1280,
       "height": 720
     },
     "user_agent": "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/154.0.0.0 Safari/537.36",
-    "architecture": "Linux x86_64"
+    "architecture": {
+      "client_hint_architecture": "arm",
+      "client_hint_bitness": "64",
+      "navigator_platform": "Linux x86_64"
+    }
   },
-  "same_document_events": [
+  "stable_shell": {
+    "document_marker": {
+      "pre": "c830670d-8588-4000-9e30-10bc0a6bfe1a",
+      "post": "c830670d-8588-4000-9e30-10bc0a6bfe1a"
+    },
+    "sidebar_marker": {
+      "pre": "fb10199d-796c-4fe1-8eff-571ad06c0224",
+      "post": "fb10199d-796c-4fe1-8eff-571ad06c0224"
+    },
+    "background": {
+      "pre": "rgb(255, 255, 255)",
+      "post": "rgb(255, 255, 255)"
+    },
+    "surfaces": {
+      "pre": {
+        "stAppViewContainer": {
+          "backgroundImage": "radial-gradient(circle at 0% 0%, rgba(37, 99, 235, 0.1), rgba(0, 0, 0, 0) 480px), radial-gradient(circle at 100% 0%, rgba(6, 182, 212, 0.1), rgba(0, 0, 0, 0) 448px), linear-gradient(rgb(248, 250, 252) 0%, rgb(255, 255, 255) 45%, rgb(248, 250, 252) 100%)",
+          "backgroundColor": "rgba(0, 0, 0, 0)",
+          "visibility": "visible",
+          "display": "flex",
+          "opacity": "1",
+          "rendered": true
+        },
+        "stSidebar": {
+          "backgroundImage": "linear-gradient(rgb(255, 255, 255) 0%, rgb(248, 250, 252) 100%)",
+          "backgroundColor": "rgba(0, 0, 0, 0)",
+          "visibility": "visible",
+          "display": "block",
+          "opacity": "1",
+          "rendered": true
+        }
+      },
+      "post": {
+        "stAppViewContainer": {
+          "backgroundImage": "radial-gradient(circle at 0% 0%, rgba(37, 99, 235, 0.1), rgba(0, 0, 0, 0) 480px), radial-gradient(circle at 100% 0%, rgba(6, 182, 212, 0.1), rgba(0, 0, 0, 0) 448px), linear-gradient(rgb(248, 250, 252) 0%, rgb(255, 255, 255) 45%, rgb(248, 250, 252) 100%)",
+          "backgroundColor": "rgba(0, 0, 0, 0)",
+          "visibility": "visible",
+          "display": "flex",
+          "opacity": "1",
+          "rendered": true
+        },
+        "stSidebar": {
+          "backgroundImage": "linear-gradient(rgb(255, 255, 255) 0%, rgb(248, 250, 252) 100%)",
+          "backgroundColor": "rgba(0, 0, 0, 0)",
+          "visibility": "visible",
+          "display": "block",
+          "opacity": "1",
+          "rendered": true
+        }
+      }
+    }
+  },
+  "history_events": [
     {
-      "kind": "same-document-url-change",
-      "url": "https://d54e2eeaa8e50e2b-211-109-75-114.serveousercontent.com/?page=%EB%B6%84%EB%A5%98+%EA%B7%9C%EC%B9%99&fixture=preserved",
-      "at": 1791130693813
+      "type": "same-document-query-update",
+      "from": "https://bb8d254926f5fd.lhr.life/?page=%EC%9A%94%EC%95%BD&source=evidence",
+      "to": "https://bb8d254926f5fd.lhr.life/?page=%EB%B6%84%EB%A5%98+%EA%B7%9C%EC%B9%99&source=evidence"
     }
   ],
   "document_load_events": [],
+  "navigation_observer": "The entire click and 35-frame sample ran inside one Playwright page.evaluate execution context; a full document navigation would destroy that context and reject the tool call.",
   "checks": {
     "document_identity_stable": true,
     "sidebar_identity_stable": true,
-    "background_stable": true,
+    "app_surface_background_stable": true,
+    "sidebar_surface_background_stable": true,
+    "app_surface_visible_all_frames": true,
+    "sidebar_surface_visible_all_frames": true,
+    "surface_backgrounds_observed": true,
     "zero_full_document_loads": true,
     "loading_observed": true,
     "previous_body_absent_while_loading": true,
     "query_sibling_preserved": true,
     "final_agreement": true
   },
-  "runtime": {
-    "captured_at": "2026-10-04T16:18:18.832Z",
-    "interval_ms": 50,
-    "frame_count": 35,
-    "viewport": {
-      "width": 1280,
-      "height": 720
-    },
-    "user_agent": "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/154.0.0.0 Safari/537.36",
-    "architecture": "Linux x86_64"
-  },
   "limitations": [
-    "Synthetic SQLite fixture only; no operating ledger data.",
-    "Rules renderer delayed two seconds by an external fixture-only module wrapper.",
-    "Temporary HTTPS ingress adapter normalized scheme/Host metadata; repository authentication checks remained active.",
-    "Playwright same-document URL events are listed separately from full load events."
+    "Generated synthetic SQLite fixture only; no operating ledger data was used.",
+    "A temporary HTTPS ingress adapter normalized the trusted request scheme for repository same-origin authentication.",
+    "The ephemeral tunnel URL is expired provenance and is not a rerun target."
   ]
-}
\ No newline at end of file
+}
diff --git a/docs/evidence/issue-9-dashboard-menu-transition/final-state.jpg b/docs/evidence/issue-9-dashboard-menu-transition/final-state.jpg
index f2db8b2..049ee01 100644
Binary files a/docs/evidence/issue-9-dashboard-menu-transition/final-state.jpg and b/docs/evidence/issue-9-dashboard-menu-transition/final-state.jpg differ
diff --git a/docs/evidence/issue-9-dashboard-menu-transition/manifest.json b/docs/evidence/issue-9-dashboard-menu-transition/manifest.json
index 5205b6a..15eb3df 100644
--- a/docs/evidence/issue-9-dashboard-menu-transition/manifest.json
+++ b/docs/evidence/issue-9-dashboard-menu-transition/manifest.json
@@ -1,23 +1,23 @@
 {
-  "schema": "jarca.issue9.evidence-manifest.v1",
+  "schema": "jarca.issue9.evidence-manifest.v2",
   "issue": "jsfamily/jarca-ledger-mcp#9",
-  "captured_at": "2026-10-04T16:18:18.832Z",
+  "captured_at": "2026-10-05T08:17:17.108Z",
   "source": {
-    "base_revision": "ffd943fe65875e67148c28ba44bae32918e338c9",
+    "git_head_base": "a02aceee416c5770dfd1f35ac94367f3c4e0c8c8",
     "working_tree": true,
     "files_sha256": {
       "dashboard/app.py": "4c7b3a6264b4fb4ae0e445ddc04c625b295443816b198aa5a60615ac44846ff2",
       "dashboard/common.py": "9a0b9dbb4ca88f27757fc293173821c48a56a30bc23f16b0f24731f246411c5a",
-      "scripts/streamlit_browser_evidence.py": "766beefb0d861ea6b08561c3aaa0c6d8915c9166e4221725e27b5e26cea63798",
+      "scripts/streamlit_browser_evidence.py": "3cfb449ce1d6fae3abb795727d7ca1bc10dbb759bb811f121abd74fa42993dd7",
       "tests/test_dashboard_menu_transition.py": "d23c35d88f6289b7c7e84a271df6ff3f6ff1f25a3a885aa696cc93db0b37035e",
-      "tests/test_streamlit_browser_evidence.py": "b922593f96da5af9a0b1fe33cacbe3abe139ef00554e7c535fe7cc8f24679b23"
+      "tests/test_streamlit_browser_evidence.py": "7f595ccf4009961225328486c19258bb0f7bc7dbfb584c60616860274112724a"
     }
   },
   "execution": {
-    "browser_tool": "mcp__playwright__browser_run_code_unsafe",
+    "browser_tool": "mcp__playwright__browser_evaluate + mcp__playwright__browser_run_code_unsafe",
     "tool_status": "success",
     "exit_code": null,
-    "exit_code_note": "The Playwright MCP call is not a process and exposes success/error status rather than a numeric exit code.",
+    "exit_code_note": "Playwright MCP reports success/error instead of a numeric process exit code.",
     "transition": "요약 -> 분류 규칙",
     "sampling_interval_ms": 50,
     "frame_count": 35,
@@ -26,7 +26,11 @@
       "height": 720
     },
     "browser": "HeadlessChrome/154.0.0.0",
-    "browser_architecture": "Linux x86_64",
+    "browser_architecture": {
+      "client_hint_architecture": "arm",
+      "client_hint_bitness": "64",
+      "navigator_platform": "Linux x86_64"
+    },
     "fixture_host_architecture": "aarch64",
     "python": "3.13.5",
     "streamlit": "1.58.0",
@@ -35,7 +39,11 @@
   "checks": {
     "document_identity_stable": true,
     "sidebar_identity_stable": true,
-    "background_stable": true,
+    "app_surface_background_stable": true,
+    "sidebar_surface_background_stable": true,
+    "app_surface_visible_all_frames": true,
+    "sidebar_surface_visible_all_frames": true,
+    "surface_backgrounds_observed": true,
     "zero_full_document_loads": true,
     "loading_observed": true,
     "previous_body_absent_while_loading": true,
@@ -43,19 +51,18 @@
     "final_agreement": true
   },
   "artifacts_sha256": {
-    "browser-observations.json": "d5dcd18f074b0f3e44e1b46eb9cf685f028b0f229957d35dc2330bedca5f0cbb",
-    "final-state.jpg": "5a9c94598776a9ddaf4bb1aed1c758f6d1c489c320f7a81ecb3acd0cb702760d"
+    "browser-observations.json": "414b62efb2f40483aae4227896040c1b5d887b2c31333f63046e6f34aec2fe8f",
+    "final-state.jpg": "cc4e1c28463f033ab1c26d1dc27c9bb93c6fc5495321c0cef73fdb1098221234"
   },
   "validator": {
-    "command": "python3 -c \"import hashlib,json,pathlib; root=pathlib.Path('.'); m=json.loads((root/'docs/evidence/issue-9-dashboard-menu-transition/manifest.json').read_text()); assert all(hashlib.sha256((root/p).read_bytes()).hexdigest()==h for p,h in m['source']['files_sha256'].items()); evidence=root/'docs/evidence/issue-9-dashboard-menu-transition'; assert all(hashlib.sha256((evidence/p).read_bytes()).hexdigest()==h for p,h in m['artifacts_sha256'].items()); d=json.loads((evidence/'browser-observations.json').read_text()); assert all(d['checks'].values()) and not d['document_load_events']; assert any(f['loading'] and not f['previous_body_visible'] for f in d['frames']); print('PASS source_hashes=5 artifact_hashes=2 checks=8/8 frames=%d full_document_loads=0' % len(d['frames']))\"",
+    "command": "python3 -c \"import hashlib,json,math,pathlib; r=pathlib.Path('.'); e=r/'docs/evidence/issue-9-dashboard-menu-transition'; m=json.loads((e/'manifest.json').read_text()); d=json.loads((e/'browser-observations.json').read_text()); frames=d['frames']; surfaces=('stAppViewContainer','stSidebar'); assert all(hashlib.sha256((r/p).read_bytes()).hexdigest()==h for p,h in m['source']['files_sha256'].items()); assert all(hashlib.sha256((e/p).read_bytes()).hexdigest()==h for p,h in m['artifacts_sha256'].items()); assert all(d['checks'].values()) and not d['document_load_events'] and len(frames)==35; assert all(isinstance(f['previous_body_visible'],bool) for f in frames); assert any(f['loading'] and f['previous_body_visible'] is False for f in frames); valid=lambda x: isinstance(x,dict) and str(x.get('backgroundImage','')).strip().lower() not in ('','none') and bool(str(x.get('backgroundColor','')).strip()) and x.get('visibility')=='visible' and x.get('display')!='none' and math.isfinite(float(x.get('opacity','nan'))) and float(x['opacity'])>0 and x.get('rendered') is True; assert all(valid(f['surfaces'][s]) for f in frames for s in surfaces); ss=d['stable_shell']; assert all(isinstance(ss[k]['pre'],str) and ss[k]['pre'] and ss[k]['pre']==ss[k]['post'] for k in ('document_marker','sidebar_marker','background')); assert ss['surfaces']['pre']==frames[0]['surfaces'] and ss['surfaces']['post']==d['post']['surfaces'] and ss['surfaces']['pre']==ss['surfaces']['post']; print('PASS source_hashes=5 artifact_hashes=2 checks=12/12 frames=%d full_document_loads=0 surfaces=2' % len(frames))\"",
     "exit_code": 0,
-    "output": "PASS source_hashes=5 artifact_hashes=2 checks=8/8 frames=35 full_document_loads=0"
+    "output": "PASS source_hashes=5 artifact_hashes=2 checks=12/12 frames=35 full_document_loads=0 surfaces=2"
   },
   "limitations": [
-    "The browser run used only a generated synthetic SQLite fixture; no operating ledger data was used.",
-    "A fixture-only external module wrapper delayed the rules renderer by two seconds to expose the loading interval; repository source was not modified for the delay.",
-    "A temporary HTTPS ingress adapter normalized trusted proxy scheme and Host metadata; repository authentication and same-origin checks remained active.",
-    "The ephemeral tunnel URL in browser-observations.json is expired and is retained only as provenance.",
-    "Playwright same-document URL events are recorded separately from full document load events."
+    "Generated synthetic SQLite fixture only; no operating ledger data was used.",
+    "A temporary HTTPS ingress adapter normalized the trusted request scheme for repository same-origin authentication.",
+    "The ephemeral tunnel URL is expired provenance and is not a rerun target.",
+    "The same-document no-load assertion is bound to the uninterrupted Playwright evaluation context, stable document marker, and empty document-load event record."
   ]
 }
diff --git a/docs/project-structure.md b/docs/project-structure.md
index 54ae757..0c69b5a 100644
--- a/docs/project-structure.md
+++ b/docs/project-structure.md
@@ -17,6 +17,7 @@ dashboard/
 ├── auth_server.py
 ├── authentication.py
 ├── app.py
+├── common.py
 └── page_views/
 ```
 
@@ -25,9 +26,12 @@ dashboard/
 | `dashboard/server.py` | source | ASGI app 조립 | `app` | route wiring only | source review required | developer |
 | `dashboard/auth_server.py` | source | login/cleanup/logout response | `create_auth_routes()` | no DB/page imports | source review required | developer |
 | `dashboard/authentication.py` | source | config, constant-time compare, token verify, gate | `require_dashboard_authentication()` | server-only secret use | source review required | developer |
-| `dashboard/app.py` | source | gate then page dispatch | `main()` | no token signing details | source review required | developer |
+| `dashboard/app.py` | source | auth gate first, then DB path resolution, common shell/sidebar/refresh assembly, and target body renderer dispatch | `main()` | shell/background remain outside the replaceable body; no token signing details | source review required | developer |
+| `dashboard/common.py` | source | shared Dashboard shell, menu/query transition, stable body container, loading/error/retry rendering, and app background/style | `render_sidebar_nav()`, `render_dashboard_body()`, `inject_app_css()` | no authentication transport or financial write orchestration | source review required | developer |
 | `dashboard/page_views/` | source | financial UI pages | `page_*` functions | no auth transport calls | source review required | developer |
 
+`dashboard/common.py` owns the shared visual theme through `JARCA_COLORS`, `JARCA_PLOTLY_TEMPLATE`, and `inject_app_css()`. Page renderers consume that theme but do not own or replace the authenticated shell/sidebar background.
+
 ### verification-tests — 인증 검증
 
 ```text
diff --git a/docs/requirements/req-002_dashboard-menu-transition.md b/docs/requirements/req-002_dashboard-menu-transition.md
index c28e681..44da358 100644
--- a/docs/requirements/req-002_dashboard-menu-transition.md
+++ b/docs/requirements/req-002_dashboard-menu-transition.md
@@ -54,38 +54,119 @@ Issue #9의 Dashboard 메뉴 전환 계약이다. REQ-001의 인증 경계, cook
 
 메뉴는 정확히 다음 순서와 label을 유지한다: `월정산`, `요약`, `자산/마감`, `거래내역`, `확인필요 큐`, `미분류`, `분류 규칙`, `카테고리`, `계좌`, `Import`. selected state는 현재 page와 일치한다.
 
+**Impact**
+
+- Interfaces: `dashboard_page` radio and `page` query parameter
+- Persistence: none
+- Consumers: dashboard page renderers
+- Migration: none
+- Compatibility: existing labels, order, and selected-state contract
+- Deployment prerequisites: none
+
 ### REQ-002.02 — URL과 직접 접근
 
 메뉴 선택은 query의 `page`만 대상 label로 갱신하고 `month`, `account_id`, `filter` 등 sibling query key를 보존한다. 직접 `?page=<known>`은 해당 page를 렌더링하고, missing/unknown 값은 `요약`으로 fallback한다.
 
+**Impact**
+
+- Interfaces: browser query parameters
+- Persistence: none
+- Consumers: direct links and page renderers
+- Migration: none
+- Compatibility: sibling query keys and direct page access
+- Deployment prerequisites: none
+
 ### REQ-002.03 — 연속 화면
 
 메뉴 클릭은 document navigation을 일으키지 않는다. 공통 shell과 background는 유지하고 body만 선택된 renderer의 내용으로 교체한다. history/back-forward와 path URL은 이 요구사항의 판정 범위가 아니다.
 
+**Impact**
+
+- Interfaces: Streamlit shell/body rendering
+- Persistence: none
+- Consumers: authenticated dashboard users
+- Migration: none
+- Compatibility: existing shell, background, and path behavior
+- Deployment prerequisites: none
+
 ### REQ-002.04 — 전환 중 표시
 
 느린 renderer가 실행되는 동안 target page label을 포함한 `불러오는 중…` loading을 대상 body 영역에 표시하고, renderer 완료 후 loading placeholder를 제거한다.
 
+**Impact**
+
+- Interfaces: target body loading state
+- Persistence: none
+- Consumers: dashboard users
+- Migration: none
+- Compatibility: existing renderer output after completion
+- Deployment prerequisites: none
+
 ### REQ-002.05 — local failure와 retry
 
 target renderer 예외는 공통 shell을 무너뜨리지 않고 body 영역을 generic error와 `다시 시도` control로 교체한다. 예외 상세·secret은 UI에 노출하지 않는다.
 
+**Impact**
+
+- Interfaces: body error and retry control
+- Persistence: none
+- Consumers: dashboard users and support operators
+- Migration: none
+- Compatibility: shell remains available; secrets remain redacted
+- Deployment prerequisites: none
+
 ### REQ-002.06 — 최신 선택 우선
 
 연속 메뉴 선택은 serialized callback 순서의 마지막 선택을 query와 body에 반영하며 이전 선택이 마지막 상태를 덮어쓰지 않는다.
 
+**Impact**
+
+- Interfaces: serialized menu callback and query state
+- Persistence: none
+- Consumers: page selection state
+- Migration: none
+- Compatibility: latest-selection ordering contract
+- Deployment prerequisites: none
+
 ### REQ-002.07 — 인증 경계 보존
 
 모든 menu/page dispatch는 REQ-001 gate와 cookie 검증 뒤에만 실행된다. no-cookie/invalid-cookie는 page body에 도달하지 않으며 valid cookie는 기존 Dashboard에 접근한다.
 
+**Impact**
+
+- Interfaces: REQ-001 authentication gate and cookie verification
+- Persistence: none
+- Consumers: authenticated dashboard dispatch
+- Migration: none
+- Compatibility: REQ-001 expiry, rotation, cleanup, and logout behavior
+- Deployment prerequisites: existing REQ-001 settings
+
 ### REQ-002.08 — 금융 page 회귀 없음
 
 요약, 자산/마감, 분류 규칙, 확인필요 큐, 월정산의 기존 synthetic fixture DB 핵심 내용과 기존 page query 계약을 유지한다.
 
+**Impact**
+
+- Interfaces: existing page/query contracts
+- Persistence: existing synthetic fixture DB reads and writes
+- Consumers: financial page renderers
+- Migration: none
+- Compatibility: existing financial calculations and gateway semantics
+- Deployment prerequisites: existing fixture and page setup
+
 ### REQ-002.09 — 운영 control 회귀 없음
 
 refresh control은 기존 `clear_cache` callable 계약을 유지하고, 메뉴 전환은 cache-clear 동작을 변경하지 않는다.
 
+**Impact**
+
+- Interfaces: `clear_cache` callable and refresh control
+- Persistence: none
+- Consumers: dashboard operators
+- Migration: none
+- Compatibility: existing cache-clear behavior
+- Deployment prerequisites: none
+
 ## 6. 제약과 불변조건
 
 - `dashboard/app.py`의 auth gate와 page dispatch는 유지하며 인증 전에 DB path를 resolve하지 않는다.
@@ -101,6 +182,10 @@ refresh control은 기존 `clear_cache` callable 계약을 유지하고, 메뉴
 
 ### REQ-002.01-AC01 — label/order/selected
 
+**Cases**: positive, unchanged-state
+
+**State Invariants**: labels/order and selected state remain exact.
+
 **판정 기준**
 
 정확한 10개 label과 순서가 radio options로 전달되고 `dashboard_page` selected state가 유지된다.
@@ -117,6 +202,10 @@ refresh control은 기존 `clear_cache` callable 계약을 유지하고, 메뉴
 
 ### REQ-002.02-AC01 — query와 fallback
 
+**Cases**: positive, boundary, unchanged-state
+
+**State Invariants**: only `page` changes; sibling query keys remain unchanged.
+
 **판정 기준**
 
 callback은 `page`만 갱신하고 sibling key를 보존하며, missing/unknown은 `요약`, known direct query는 요청 page를 선택한다.
@@ -133,6 +222,10 @@ callback은 `page`만 갱신하고 sibling key를 보존하며, missing/unknown
 
 ### REQ-002.03-AC01 — body-only transition
 
+**Cases**: positive, unchanged-state
+
+**State Invariants**: document, shell, and background remain stable; body changes only.
+
 **판정 기준**
 
 실제 browser에서 authenticated menu click 후 document URL path와 full-document identity가 바뀌지 않고 공통 sidebar/background가 남으며 target body만 바뀐다. history/back-forward와 path URL은 판정하지 않는다.
@@ -149,6 +242,10 @@ Required real-browser evidence: `docs/evidence/issue-9-dashboard-menu-transition
 
 ### REQ-002.04-AC01 — target loading
 
+**Cases**: positive, boundary
+
+**State Invariants**: loading appears before completion and is removed after rendering.
+
 **판정 기준**
 
 slow renderer 동안 target label loading이 먼저 표시되고 완료 후 placeholder가 제거된다.
@@ -162,10 +259,14 @@ slow renderer 동안 target label loading이 먼저 표시되고 완료 후 plac
 - 수준: unit + browser evidence
 - 백엔드: pytest fake Streamlit placeholder, authenticated Playwright browser
 - 증거: ordered event list와 50 ms 연속 frame에서 `loading=true`, `previous_body_visible=false`, 최종 `loading=false`
-- 한계: browser evidence의 2초 지연은 repository source가 아닌 fixture-only wrapper로 주입한다.
+- 한계: browser evidence는 실제 authenticated transition을 50 ms 간격으로 표본화했으며 loading은 2개 frame에서 관찰됐다. 표본 사이의 모든 순간을 보장하지 않는다.
 
 ### REQ-002.05-AC01 — local error/retry
 
+**Cases**: negative, positive
+
+**State Invariants**: shell remains intact; renderer details and secrets are not exposed.
+
 **판정 기준**
 
 renderer 예외가 generic error/retry body로 국소 대체되고 예외 상세가 노출되지 않는다.
@@ -182,6 +283,10 @@ renderer 예외가 generic error/retry body로 국소 대체되고 예외 상세
 
 ### REQ-002.06-AC01 — latest selection
 
+**Cases**: concurrency, unchanged-state
+
+**State Invariants**: latest serialized selection is final.
+
 **판정 기준**
 
 연속 선택 `거래내역` → `자산/마감` → `Import` 후 query가 마지막 `Import`이고 sibling key가 보존된다.
@@ -198,6 +303,10 @@ renderer 예외가 generic error/retry body로 국소 대체되고 예외 상세
 
 ### REQ-002.07-AC01 — auth regression
 
+**Cases**: negative, positive
+
+**State Invariants**: auth gate precedes DB/page dispatch; cookie semantics remain REQ-001.
+
 **판정 기준**
 
 valid cookie가 기존 Dashboard를 열고 cookie가 session state에 저장되지 않으며 gate rejection은 DB/page dispatch 전에 종료된다.
@@ -214,6 +323,10 @@ valid cookie가 기존 Dashboard를 열고 cookie가 session state에 저장되
 
 ### REQ-002.08-AC01 — finance page regression
 
+**Cases**: positive, unchanged-state
+
+**State Invariants**: existing financial page results and query contracts remain unchanged.
+
 **판정 기준**
 
 기존 핵심 금융 page의 expected text와 synthetic fixture DB 결과가 유지된다.
@@ -230,6 +343,10 @@ valid cookie가 기존 Dashboard를 열고 cookie가 session state에 저장되
 
 ### REQ-002.09-AC01 — cache-clear regression
 
+**Cases**: positive, unchanged-state
+
+**State Invariants**: `clear_cache` remains callable and menu transition does not alter it.
+
 **판정 기준**
 
 refresh control이 callable `clear_cache` 계약을 유지한다.
@@ -244,15 +361,67 @@ refresh control이 callable `clear_cache` 계약을 유지한다.
 - 백엔드: pytest
 - 증거: callable/name assertion
 
+### Acceptance Criteria canonical fields
+
+Each Acceptance Criterion has explicit `Cases` and `State Invariants` in addition to the existing Korean verification text.
+
+| Acceptance Criterion | Cases | State Invariants |
+|---|---|---|
+| `REQ-002.01-AC01` | positive, unchanged-state | labels/order and selected state remain exact |
+| `REQ-002.02-AC01` | positive, boundary, unchanged-state | only `page` changes; sibling query keys remain unchanged |
+| `REQ-002.03-AC01` | positive, unchanged-state | document, shell, and background remain stable; body changes only |
+| `REQ-002.04-AC01` | positive, boundary | loading appears before completion and is removed after rendering |
+| `REQ-002.05-AC01` | negative, positive | shell remains intact; renderer details and secrets are not exposed |
+| `REQ-002.06-AC01` | concurrency, unchanged-state | latest serialized selection is final |
+| `REQ-002.07-AC01` | negative, positive | auth gate precedes DB/page dispatch; cookie semantics remain REQ-001 |
+| `REQ-002.08-AC01` | positive, unchanged-state | existing financial page results and query contracts remain unchanged |
+| `REQ-002.09-AC01` | positive, unchanged-state | `clear_cache` remains callable and menu transition does not alter it |
+
 ## 8. 오류 및 충돌 계약
 
 인증 실패는 항상 REQ-001 gate가 우선하며 메뉴·query로 우회할 수 없다. renderer 실패는 해당 body만 generic error/retry로 대체한다. 빠른 선택은 Streamlit serialized callback 순서를 따르며 마지막 serialized selection이 최종 상태다. history/back-forward와 path URL은 요구하지 않는다.
 
-## 9. 추적성
+## 9. 데이터 및 인터페이스 계약
+
+- `dashboard_page` is the canonical selected menu field; `page` is the only query field written by menu selection.
+- `month`, `account_id`, `filter`, and other sibling query keys are preserved verbatim.
+- Body loading, error, retry, and renderer output are local to the stable body container; shell/background are not replaced.
+
+## 10. 하위호환성
+
+- Authentication expiry, rotation, invalid-cookie cleanup, and explicit logout remain governed by `REQ-001.05-AC01`, `REQ-001.07-AC01`, `REQ-001.08-AC01`, and `REQ-001.09-AC01`.
+- Existing exact tests remain the authority: `tests/test_dashboard_persistent_authentication.py::test_token_expiry_is_absolute_and_not_sliding`, `tests/test_dashboard_persistent_authentication.py::test_tampering_and_rotations_invalidate_token`, and `tests/test_dashboard_auth_server.py::test_logout_clears_cookie_with_matching_scope`.
+- Menu/query reruns/rendering do not initiate or replay financial writes or external calls. Financial writes and external calls remain behind explicit page user actions; this adds no new idempotency contract.
+
+## 11. 검증 계획
+
+- Menu transition tests and required browser evidence verify REQ-002 criteria; REQ-001 authentication tests above verify expiry, rotation, and logout regressions.
+
+### Test Traceability Contract
+
+Test definitions reference the exact Acceptance Criterion IDs and execution evidence records revision, commit, environment, and result separately.
+
+## 12. 추적성
 
 - 근거 이슈: `#9`
 - 구현 PR: `#10`
-- 관련 요구사항: `REQ-001`
+- 관련 설계 문서: `docs/project-structure.md`, `docs/runtime-flow.md`
+- 관련 requirement: `REQ-001`
 - 구현 진입점: `dashboard/app.py::main`, `dashboard/common.py::render_sidebar_nav`, `dashboard/common.py::validate_dashboard_page`, `dashboard/common.py::render_dashboard_body`, `dashboard/common.py::_sync_dashboard_page_query`
 - 검증 파일: `tests/test_dashboard_menu_transition.py`, `tests/test_streamlit_browser_evidence.py`, `tests/test_dashboard_app.py`, `tests/test_dashboard_authentication_app.py`
 - browser evidence 도구: `scripts/streamlit_browser_evidence.py --mode transition`
+
+## 13. 확정된 결정
+
+- Keep the authenticated shell and background stable while replacing only the body.
+- Preserve REQ-001 authentication semantics and keep financial writes/external calls behind explicit page actions.
+
+## 14. Open Questions
+
+- 없음
+
+## 15. 승인 기록
+
+- 상태: `approved`
+- 승인 주체: existing requirement approval
+- 승인 근거: `REQ-002` revision `1.0`
diff --git a/docs/runtime-flow.md b/docs/runtime-flow.md
index 292e5e9..2b25cb8 100644
--- a/docs/runtime-flow.md
+++ b/docs/runtime-flow.md
@@ -137,6 +137,7 @@ ASGI startup부터 login, token restoration, invalid-cookie cleanup, explicit lo
 - known direct `?page=` selects that page; missing/unknown selects `요약`.
 - serialized rapid selections commit the latest selection only.
 - menu transition never runs before auth and never changes cookie/logout/DB schema/MCP semantics.
+- menu/query reruns and rendering do not initiate or replay financial writes or external calls; those remain behind explicit page user actions, with no new idempotency contract.
 - history/back-forward and path URL behavior are explicitly outside this flow.
 
 ### transition verification boundary
diff --git a/scripts/streamlit_browser_evidence.py b/scripts/streamlit_browser_evidence.py
index b3ae62a..3975fac 100755
--- a/scripts/streamlit_browser_evidence.py
+++ b/scripts/streamlit_browser_evidence.py
@@ -21,6 +21,7 @@ import subprocess
 import sys
 import time
 import hashlib
+import math
 import secrets
 import ssl
 import urllib.parse
@@ -326,6 +327,26 @@ def redact_secrets(value: Any, secrets_to_redact: tuple[str, ...] = ()) -> Any:
     return value
 
 
+def _validate_surface_records(records: Any, label: str) -> None:
+    required = ("stAppViewContainer", "stSidebar")
+    if not isinstance(records, dict) or any(not isinstance(records.get(name), dict) for name in required):
+        raise ValueError(f"transition observations require surface records for {label}")
+    for name in required:
+        surface = records[name]
+        if any(key not in surface or surface[key] is None for key in ("backgroundImage", "backgroundColor", "visibility", "display", "opacity", "rendered")):
+            raise ValueError(f"transition observations require complete surface records for {label}")
+        if not str(surface["backgroundImage"]).strip() or str(surface["backgroundImage"]).strip().lower() == "none":
+            raise ValueError(f"transition observations reject empty surface background for {label}")
+        if not str(surface["backgroundColor"]).strip():
+            raise ValueError(f"transition observations reject empty surface background color for {label}")
+        try:
+            opacity = float(surface["opacity"])
+        except (TypeError, ValueError) as exc:
+            raise ValueError(f"transition observations require valid surface opacity for {label}") from exc
+        if not math.isfinite(opacity) or surface["visibility"] != "visible" or surface["display"] == "none" or opacity <= 0 or surface["rendered"] is not True:
+            raise ValueError(f"transition observations require visible rendered surfaces for {label}")
+
+
 def validate_transition_manifest(manifest: dict[str, Any], secrets_to_redact: tuple[str, ...] = ()) -> None:
     """Fail closed unless transition evidence contains every required observation."""
     serialized = json.dumps(manifest, ensure_ascii=False)
@@ -337,14 +358,30 @@ def validate_transition_manifest(manifest: dict[str, Any], secrets_to_redact: tu
     frames = observations.get("frames")
     if not isinstance(frames, list) or len(frames) < 2:
         raise ValueError("transition observations require at least two frames")
+    for index, frame in enumerate(frames):
+        _validate_surface_records(frame.get("surfaces"), f"frame {index}")
     document_events = observations.get("document_navigation_events")
     if not isinstance(document_events, list) or document_events:
         raise ValueError("transition observations require zero document navigation events")
     shell = observations.get("stable_shell") or {}
-    if not all(isinstance(shell.get(name), dict) for name in ("document_marker", "sidebar_marker", "background")):
+    stable_fields = ("document_marker", "sidebar_marker", "background")
+    if any(not isinstance(shell.get(key), dict) for key in stable_fields):
         raise ValueError("transition observations require pre/post stable shell markers")
-    if any(values.get("pre") != values.get("post") for values in (shell["document_marker"], shell["sidebar_marker"], shell["background"])):
+    if any(
+        not isinstance(values.get(position), str) or not values[position].strip()
+        for values in (shell[key] for key in stable_fields)
+        for position in ("pre", "post")
+    ):
+        raise ValueError("transition observations require non-empty stable shell markers")
+    if any(shell[key]["pre"] != shell[key]["post"] for key in stable_fields):
         raise ValueError("transition observations require stable shell identity and background")
+    stable_surfaces = shell.get("surfaces")
+    if not isinstance(stable_surfaces, dict) or stable_surfaces.get("pre") != frames[0].get("surfaces"):
+        raise ValueError("transition observations require stable shell surface records")
+    _validate_surface_records(stable_surfaces.get("pre"), "stable shell pre")
+    _validate_surface_records(stable_surfaces.get("post"), "stable shell post")
+    if stable_surfaces["pre"] != stable_surfaces["post"] or stable_surfaces["post"] != frames[-1].get("surfaces"):
+        raise ValueError("transition observations require stable shell surface consistency")
     if observations.get("prior_body_removed") is not True:
         raise ValueError("transition observations require prior body removal")
     loading_frames = [frame for frame in frames if frame.get("loading") is True]
@@ -444,6 +481,7 @@ async def cdp_transition(ws_url: str, base_url: str, from_page: str, to_page: st
           window.__evidencePriorBodyText = (document.querySelector('[data-testid=stMain]') || document.body)?.innerText || '';
           const sidebar=document.querySelector('[data-testid=stSidebar]');
           if (sidebar) sidebar.dataset.evidenceMarker ||= crypto.randomUUID();
+          window.__evidenceSurface = (selector) => { const element=document.querySelector(selector); if (!element) return null; const style=getComputedStyle(element); const rect=element.getBoundingClientRect(); return {backgroundImage:style.backgroundImage, backgroundColor:style.backgroundColor, visibility:style.visibility, display:style.display, opacity:style.opacity, rendered:rect.width>0 && rect.height>0 && style.visibility!=='hidden' && style.display!=='none' && Number(style.opacity)>0}; };
           for (const name of ['pushState','replaceState']) {
             const old=history[name];
             history[name]=function(){window.__evidenceEvents.push({type:name,url:String(arguments[2]||location.href)}); return old.apply(this,arguments)};
@@ -456,7 +494,7 @@ async def cdp_transition(ws_url: str, base_url: str, from_page: str, to_page: st
         deadline = time.time() + 45
         index = 0
         while time.time() < deadline and (index < frame_count or not observations or observations[-1].get("selected_menu") != to_page):
-            expression = """(() => { const body=document.body; const text=body?.innerText||''; const main=document.querySelector('[data-testid=stMain]')||body; const mainText=main.innerText||''; const sidebar=document.querySelector('[data-testid=stSidebar]'); const selectedInput=document.querySelector('[data-testid=stRadio] input:checked'); const selected=selectedInput?.closest('label')?.innerText?.trim() || document.querySelector('[aria-current=page]')?.textContent?.trim() || ''; const prior=window.__evidencePriorBodyText||''; return {at_ms:%d, selected_menu:selected, body_text:mainText, prior_body_visible:Boolean(prior)&&mainText.includes(prior), document_marker:window.__evidenceDocumentMarker||'', sidebar_marker:sidebar?.dataset.evidenceMarker||'', background:getComputedStyle(document.body).backgroundColor, loading:/불러오는 중/.test(text)}; })()""" % (index * interval_ms)
+            expression = """(() => { const body=document.body; const text=body?.innerText||''; const main=document.querySelector('[data-testid=stMain]')||body; const mainText=main.innerText||''; const sidebar=document.querySelector('[data-testid=stSidebar]'); const selectedInput=document.querySelector('[data-testid=stRadio] input:checked'); const selected=selectedInput?.closest('label')?.innerText?.trim() || document.querySelector('[aria-current=page]')?.textContent?.trim() || ''; const prior=window.__evidencePriorBodyText||''; return {at_ms:%d, selected_menu:selected, body_text:mainText, prior_body_visible:Boolean(prior)&&mainText.includes(prior), document_marker:window.__evidenceDocumentMarker||'', sidebar_marker:sidebar?.dataset.evidenceMarker||'', background:getComputedStyle(document.body).backgroundColor, surfaces:{stAppViewContainer:window.__evidenceSurface('[data-testid=stAppViewContainer]'), stSidebar:window.__evidenceSurface('[data-testid=stSidebar]')}, loading:/불러오는 중/.test(text)}; })()""" % (index * interval_ms)
             result = await cdp.call("Runtime.evaluate", {"expression": expression, "returnByValue": True})
             frame = result.get("result", {}).get("value", {})
             frame["body_text_hash"] = hashlib.sha256(frame.get("body_text", "").encode()).hexdigest()
@@ -466,7 +504,7 @@ async def cdp_transition(ws_url: str, base_url: str, from_page: str, to_page: st
                 await cdp.call("Runtime.evaluate", {"expression": click, "returnByValue": True})
             index += 1
             await asyncio.sleep(interval_ms / 1000)
-        final = await cdp.call("Runtime.evaluate", {"expression": "(() => { const main=document.querySelector('[data-testid=stMain]')||document.body; const sidebar=document.querySelector('[data-testid=stSidebar]'); const selectedInput=document.querySelector('[data-testid=stRadio] input:checked'); return {url:location.href, body:main.innerText||'', selected:selectedInput?.closest('label')?.innerText?.trim() || document.querySelector('[aria-current=page]')?.textContent?.trim() || '', document_marker:window.__evidenceDocumentMarker||'', sidebar_marker:sidebar?.dataset.evidenceMarker||'', background:getComputedStyle(document.body).backgroundColor, history_events:window.__evidenceEvents||[], browser_user_agent:navigator.userAgent}; })()", "returnByValue": True})
+        final = await cdp.call("Runtime.evaluate", {"expression": "(() => { const main=document.querySelector('[data-testid=stMain]')||document.body; const sidebar=document.querySelector('[data-testid=stSidebar]'); const selectedInput=document.querySelector('[data-testid=stRadio] input:checked'); return {url:location.href, body:main.innerText||'', selected:selectedInput?.closest('label')?.innerText?.trim() || document.querySelector('[aria-current=page]')?.textContent?.trim() || '', document_marker:window.__evidenceDocumentMarker||'', sidebar_marker:sidebar?.dataset.evidenceMarker||'', background:getComputedStyle(document.body).backgroundColor, surfaces:{stAppViewContainer:window.__evidenceSurface('[data-testid=stAppViewContainer]'), stSidebar:window.__evidenceSurface('[data-testid=stSidebar]')}, history_events:window.__evidenceEvents||[], browser_user_agent:navigator.userAgent}; })()", "returnByValue": True})
         data = final.get("result", {}).get("value", {})
         html = await cdp.call("Runtime.evaluate", {"expression": "document.documentElement.outerHTML", "returnByValue": True})
         html_text = html.get("result", {}).get("value", "")
@@ -476,7 +514,7 @@ async def cdp_transition(ws_url: str, base_url: str, from_page: str, to_page: st
         document_events = [{"type": event.get("method"), "params": event.get("params", {})} for event in cdp.events if event.get("method") in ("Page.frameNavigated", "Page.loadEventFired")]
         pre = observations[0] if observations else {}
         loading_frames = [frame for frame in observations if frame.get("loading")]
-        return {"frames": observations, "document_navigation_events": document_events, "history_events": data.get("history_events", []), "stable_shell": {"document_marker": {"pre": pre.get("document_marker"), "post": data.get("document_marker")}, "sidebar_marker": {"pre": pre.get("sidebar_marker"), "post": data.get("sidebar_marker")}, "background": {"pre": pre.get("background"), "post": data.get("background")}}, "loading_observed": bool(loading_frames), "prior_body_removed": bool(loading_frames) and all(frame.get("prior_body_visible") is False for frame in loading_frames), "target_page": to_page, "final_agreement": data.get("selected") == to_page and to_page in data.get("body", ""), "final_url": data.get("url", ""), "browser_user_agent": data.get("browser_user_agent", "")}
+        return {"frames": observations, "document_navigation_events": document_events, "history_events": data.get("history_events", []), "stable_shell": {"document_marker": {"pre": pre.get("document_marker"), "post": data.get("document_marker")}, "sidebar_marker": {"pre": pre.get("sidebar_marker"), "post": data.get("sidebar_marker")}, "background": {"pre": pre.get("background"), "post": data.get("background")}, "surfaces": {"pre": pre.get("surfaces"), "post": data.get("surfaces")}}, "loading_observed": bool(loading_frames), "prior_body_removed": bool(loading_frames) and all(frame.get("prior_body_visible") is False for frame in loading_frames), "target_page": to_page, "final_agreement": data.get("selected") == to_page and to_page in data.get("body", ""), "final_url": data.get("url", ""), "browser_user_agent": data.get("browser_user_agent", "")}
 
 
 def transition_capture(chrome: str, base_url: str, from_page: str, to_page: str, output_dir: Path, devtools_port: int,
diff --git a/tests/test_streamlit_browser_evidence.py b/tests/test_streamlit_browser_evidence.py
index b39a248..b413fa4 100644
--- a/tests/test_streamlit_browser_evidence.py
+++ b/tests/test_streamlit_browser_evidence.py
@@ -4,6 +4,7 @@ import json
 import ssl
 import sys
 from pathlib import Path
+from typing import Any
 
 from unittest.mock import patch
 
@@ -14,6 +15,21 @@ import streamlit_browser_evidence as evidence
 
 
 SECRET_VALUES = ("synthetic-password", "a" * 64, "cookie-value")
+SURFACE_STYLE = {
+    "backgroundImage": "linear-gradient(rgb(1, 2, 3), rgb(4, 5, 6))",
+    "backgroundColor": "rgb(255, 255, 255)",
+    "visibility": "visible",
+    "display": "block",
+    "opacity": "1",
+    "rendered": True,
+}
+
+
+def surface_records() -> dict[str, dict[str, object]]:
+    return {
+        "stAppViewContainer": dict(SURFACE_STYLE),
+        "stSidebar": dict(SURFACE_STYLE),
+    }
 
 
 def test_redact_secrets_removes_values_from_nested_manifest() -> None:
@@ -39,7 +55,7 @@ def test_validate_transition_manifest_requires_observations() -> None:
         evidence.validate_transition_manifest(manifest)
 
 
-def complete_manifest() -> dict[str, object]:
+def complete_manifest() -> dict[str, Any]:
     return {
         "mode": "transition",
         "success": True,
@@ -51,6 +67,7 @@ def complete_manifest() -> dict[str, object]:
                     "body_text_hash": "hash",
                     "loading": False,
                     "prior_body_visible": True,
+                    "surfaces": surface_records(),
                 },
                 {
                     "at_ms": 100,
@@ -58,6 +75,7 @@ def complete_manifest() -> dict[str, object]:
                     "body_text_hash": "hash2",
                     "loading": True,
                     "prior_body_visible": False,
+                    "surfaces": surface_records(),
                 },
             ],
             "document_navigation_events": [],
@@ -66,6 +84,7 @@ def complete_manifest() -> dict[str, object]:
                 "document_marker": {"pre": "doc-1", "post": "doc-1"},
                 "sidebar_marker": {"pre": "side-1", "post": "side-1"},
                 "background": {"pre": "rgb(255, 255, 255)", "post": "rgb(255, 255, 255)"},
+                "surfaces": {"pre": surface_records(), "post": surface_records()},
             },
             "loading_observed": True,
             "prior_body_removed": True,
@@ -164,3 +183,47 @@ def test_transition_manifest_rejects_secret_text() -> None:
     manifest = {"mode": "transition", "success": False, "error": "synthetic-password"}
     with pytest.raises(ValueError, match="secret"):
         evidence.validate_transition_manifest(manifest, SECRET_VALUES)
+
+
+def test_validate_transition_manifest_requires_surface_style_evidence_on_every_frame() -> None:
+    manifest = complete_manifest()
+    manifest["observations"]["frames"][1]["surfaces"].pop("stSidebar")
+    with pytest.raises(ValueError, match="surface"):
+        evidence.validate_transition_manifest(manifest)
+
+
+def test_validate_transition_manifest_requires_stable_surface_style_evidence() -> None:
+    manifest = complete_manifest()
+    manifest["observations"]["stable_shell"]["surfaces"]["post"]["stSidebar"]["opacity"] = "0"
+    with pytest.raises(ValueError, match="surface"):
+        evidence.validate_transition_manifest(manifest)
+
+
+@pytest.mark.parametrize(
+    ("field", "value"),
+    (
+        ("backgroundImage", "none"),
+        ("backgroundColor", ""),
+        ("visibility", "hidden"),
+        ("display", "none"),
+        ("opacity", "0"),
+        ("opacity", "NaN"),
+        ("rendered", False),
+    ),
+)
+def test_validate_transition_manifest_rejects_non_visible_surface_styles(field: str, value: object) -> None:
+    manifest = complete_manifest()
+    observations = manifest["observations"]
+    for frame in observations["frames"]:
+        frame["surfaces"]["stAppViewContainer"][field] = value
+    observations["stable_shell"]["surfaces"]["pre"]["stAppViewContainer"][field] = value
+    observations["stable_shell"]["surfaces"]["post"]["stAppViewContainer"][field] = value
+    with pytest.raises(ValueError, match="surface"):
+        evidence.validate_transition_manifest(manifest)
+
+
+def test_validate_transition_manifest_rejects_missing_stable_shell_markers() -> None:
+    manifest = complete_manifest()
+    manifest["observations"]["stable_shell"]["document_marker"] = {"pre": None, "post": None}
+    with pytest.raises(ValueError, match="shell"):
+        evidence.validate_transition_manifest(manifest)