style(workspace): remove the embedded work preview title bar

.project-docs/30-worklog/tasks/20260928-teacher-reply-cleanup-c8e4a219.md

@@ -8,7 +8,7 @@
 - Worktree: /Users/chillishark/Makelore 麦洛/.codex-worktrees/makelore-teacher-reply-cleanup
 - Base commit: ae0f72d8fa0089f87b41d272da220e1c1397aec8
 - Owner: codex
-- Status: Ready for Integration
+- Status: In progress
 
 ## Scope
 
@@ -127,3 +127,12 @@
 - Refreshed existing trial Renderer from committed 784fa8c to `index-DLBsnWbW.js`. Main PID 36109 and profile retained. Final DOM confirms visible composer hint text “继续看看👀” with `rgb(255, 242, 201)` background; captured and inspected the actual empty-composer screenshot `visible-hint-preview.png` in the local trial root. Login/account/project/draft/input/route checks passed; no generated conversation content or requests were inserted for demonstration.
 - Window/panel/selection state changed during the live verification: the consultation panel was closed at snapshot and open at final capture, and the selection equality check was false. Preserved current interaction without a second forced selection restore; do not claim exact conversation/window state remained unchanged. The foreground monitor already observed the trial as its sole foreground application; refresh invoked no show/focus calls. Final capture was taken with the window unfocused.
 - Temporary backup memory and inspector removed; local launch/build metadata updated. No cloud publication, Main restart, main merge or push. Final documentation drift has only the previously recorded unchanged imported task document diagnostic.
+
+## Embedded Work Preview Header Follow-up
+
+- User requests removal of the pictured horizontal “作品预览” title/icon/close row. Continue the current temporary workspace preview without taking desktop focus.
+- Same feature ownership resumed and verified. Reused unchanged previously loaded project context; reread own task/entry and newly active welcome/truncation/role-review task records. Existing peer scopes remain unchanged; no work-preview overlap or unresolved product decision. Gate Passed. This scoped presentation change preserves the shared browser's lifecycle, navigation, recovery, native viewport and separate developer-browser UI.
+- Plan: hide the redundant header only in embedded work preview, retain an accessible aside name and the existing top-level operation/work tabs; keep address navigation and standalone browser close controls. Update existing unit/native E2E assertions, compile, and refresh only the temporary Renderer. Main/remote branches and installed production application remain unchanged.
+
+- Implemented conditional removal of the entire embedded title row (globe icon, “作品预览”, close button); the work-preview aside remains accessibly named. Address/back/forward/reload controls and the native viewport remain, while the standalone developer-browser header and close action are unchanged.
+- Passed: 44 AgentBrowserPanel/CodingChatPanel unit tests, typecheck, full lint plus scoped test lint, full production compile and whitespace check. Updated shared Electron work-tab assertions without launching a native test instance.