feat: add workspace file management and embedded browsing

Users previously had to leave the workbar to manage project files and inspect Git branches or commit history. Add file and directory creation, rename, move, delete and properties, plus searchable branches, branch creation and switching, explicit fetch, and commit file diffs.

Keep file previews in the right workspace pane with directory expansion, selection, scroll and focus preserved on return. Add compact action menus, directory pickers, preview refresh and source switching. Embed the shared browser session directly in the workbar with navigation, resizing and fullscreen controls instead of a separate interaction window.

Moves stay within the current workspace, deletion is permanent after confirmation, and Git switch reports conflicts without discarding or stashing changes. Typecheck, lint and staged whitespace checks pass; existing full-suite failures and the blocked real remote directory validation remain recorded in the workbar progress document.

Release note: 可在右侧工作区管理文件、切换 Git 分支并查看提交历史，返回预览后保留浏览位置；浏览器支持在工作栏内直接交互和全屏显示。

src/main/browser/browser-service.ts

@@ -9,6 +9,7 @@ import type { BrowserScreenshot } from './browser-screenshot'
 import {
   ElectronBrowserSession,
   type BrowserParentWindowHandle,
+  type BrowserWindowBounds,
   type BrowserWebContents
 } from './electron-browser-session'
 import type { BrowserLiveState } from '../../shared/contracts'
@@ -31,7 +32,8 @@ export type BrowserSessionLike = {
   getCurrentOrigin(): string | undefined
   isLoading(): boolean
   onLoadingChange(listener: (isLoading: boolean) => void): () => void
-  openInteraction(): Promise<BrowserScreenshot | undefined>
+  onNavigationChange?(listener: (url: string) => void): () => void
+  setViewport?(bounds?: BrowserWindowBounds): void
   stopLoading(): void
   captureScreenshot?(signal: AbortSignal): Promise<BrowserScreenshot>
   dispose(): Promise<void>
@@ -84,6 +86,7 @@ type BrowserSlot = {
   isLoading: boolean
   stopLoadingRequested: boolean
   removeLoadingListener: () => void
+  removeNavigationListener: () => void
   idleTimer?: ReturnType<typeof setTimeout>
   lastUsedAt: number
   released: boolean
@@ -172,6 +175,8 @@ export class BrowserService {
     (state: BrowserLiveState) => void
   >()
   private readonly liveStates = new Map<string, BrowserLiveState>()
+  private visibleConversationId?: string
+  private viewportBounds?: BrowserWindowBounds
   private lifecycle = new AbortController()
   private clearOperation?: Promise<void>
   private clearing = false
@@ -221,6 +226,19 @@ export class BrowserService {
     }
   }
 
+  setViewport(
+    conversationId?: string,
+    bounds?: BrowserWindowBounds
+  ): void {
+    this.visibleConversationId = conversationId
+    this.viewportBounds = bounds
+    for (const [id, slot] of this.slots) {
+      slot.session.setViewport?.(
+        id === conversationId ? bounds : undefined
+      )
+    }
+  }
+
   private emitState(
     conversationId: string,
     status: BrowserLiveState['status'],
@@ -500,10 +518,16 @@ export class BrowserService {
       isLoading: session.isLoading(),
       stopLoadingRequested: false,
       removeLoadingListener: () => undefined,
+      removeNavigationListener: () => undefined,
       lastUsedAt: Date.now(),
       released: false
     }
     this.slots.set(conversationId, slot)
+    slot.session.setViewport?.(
+      this.visibleConversationId === conversationId
+        ? this.viewportBounds
+        : undefined
+    )
     slot.removeLoadingListener = session.onLoadingChange((isLoading) => {
       if (!isLoading) {
         slot.stopLoadingRequested = false
@@ -518,9 +542,49 @@ export class BrowserService {
       slot.isLoading = isLoading
       const current = this.liveStates.get(conversationId)
       if (current) {
-        this.emitState(conversationId, current.status, { isLoading })
+        const status =
+          slot.active?.status ??
+          (isLoading
+            ? 'loading'
+            : current.status === 'loading'
+              ? 'ready'
+              : current.status)
+        this.emitState(conversationId, status, { isLoading })
       }
     })
+    slot.removeNavigationListener =
+      session.onNavigationChange?.((url) => {
+        if (slot.released || this.slots.get(conversationId) !== slot) {
+          return
+        }
+        try {
+          const target = canonicalizeBrowserUrl(url)
+          slot.origin = target.origin
+          slot.lastUsedAt = Date.now()
+          this.scheduleIdleExpiry(slot)
+          const status = slot.active?.status ?? 'ready'
+          this.emitState(conversationId, status, { url: target.href })
+          void slot.driver
+            .getNavigationMetadata(AbortSignal.timeout(2_000))
+            .then((metadata) => {
+              if (
+                slot.released ||
+                this.slots.get(conversationId) !== slot ||
+                canonicalizeBrowserUrl(metadata.url).href !== target.href
+              ) {
+                return
+              }
+              this.emitState(
+                conversationId,
+                slot.active?.status ?? 'ready',
+                { url: target.href, canGoBack: metadata.canGoBack }
+              )
+            })
+            .catch(() => undefined)
+        } catch {
+          // The session rejects unsupported top-level URLs.
+        }
+      }) ?? (() => undefined)
     this.scheduleIdleExpiry(slot)
     return slot
   }
@@ -878,37 +942,6 @@ export class BrowserService {
     )
   }
 
-  async interact(
-    conversationId: string,
-    signal: AbortSignal
-  ): Promise<void> {
-    await this.runInSession(
-      conversationId,
-      signal,
-      'interactive',
-      false,
-      '浏览器交互',
-      async (slot, effectiveSignal) => {
-        await this.verifyCurrentOriginOrRelease(slot)
-        const closingFrame = await waitFor(
-          slot.session.openInteraction(),
-          effectiveSignal
-        )
-        const currentUrl = canonicalizeBrowserUrl(
-          slot.session.webContents.getURL()
-        )
-        slot.origin = currentUrl.origin
-        await this.captureFrame(
-          conversationId,
-          slot,
-          effectiveSignal,
-          currentUrl.href,
-          closingFrame
-        )
-      }
-    )
-  }
-
   async stopLoading(conversationId: string): Promise<boolean> {
     const slot = this.slots.get(conversationId)
     const active = slot?.active
@@ -1043,6 +1076,7 @@ export class BrowserService {
       slot.idleTimer = undefined
     }
     slot.removeLoadingListener()
+    slot.removeNavigationListener()
     slot.active?.controller.abort(new Error('浏览器会话已释放'))
     try {
       slot.driver.dispose()