feat: refine web analytics and history views

.project-docs/50-evidence/topics/2026-07-31-channel-bi-header-utilities.md

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+# Channel BI header utilities
+
+## Scope
+
+This records the 2026-07-31 visual refinement of the ARR Web Channel BI page. The change is presentation-only and
+does not alter analytics payloads, report generation, authentication endpoints or business data.
+
+## Implemented
+
+- Removed the visible `渠道BI` page heading from the desktop BI panel and H5 hero. The top navigation label and H5
+  document title remain available as context.
+- Removed the ready-state `数据库已连接` wording. The desktop/H5 status indicator keeps its colored dot and an
+  accessible status label, while the unavailable state still exposes its visible warning copy.
+- Reduced the `查看月份` control to a compact 92px/26px selector family on desktop and H5 so it reads as a quiet
+  utility rather than a competing page heading.
+- Raised the desktop BI panel by 20px toward the four-tab bar after removing the page heading; the responsive
+  desktop shell uses a smaller 10px adjustment on narrow widths to retain breathing room.
+- Replaced the desktop task-log and logout button chrome with focusable text links. Their event interception, dialog
+  opening, logout request and busy/error handling remain intact; H5 logout follows the same low-emphasis pattern.
+
+## Verification
+
+- `node --check arr_web/static/app.js`
+- `node --check arr_web/static/h5.js`
+- 21 focused BI, daily visual, task-log and auth tests passed.
+- 18 `tests.test_arr_web` tests passed.