perf: 1s debounce for active workspace git status

Active workspace now uses 1s debounce for git status refresh after
file-modifying tools complete, while background workspaces keep 3s.

This makes the visible git indicators feel more responsive without
adding load from background workspace refreshes.

Author: ammar-agent

src/browser/App.tsx

@@ -17,6 +17,7 @@ import { buildSortedWorkspacesByProject } from "./utils/ui/workspaceFiltering";
 import { useResumeManager } from "./hooks/useResumeManager";
 import { useUnreadTracking } from "./hooks/useUnreadTracking";
 import { useWorkspaceStoreRaw, useWorkspaceRecency } from "./stores/WorkspaceStore";
+import { setActiveWorkspace } from "./stores/GitStatusStore";
 
 import { useStableReference, compareMaps } from "./hooks/useStableReference";
 import { CommandRegistryProvider, useCommandRegistry } from "./contexts/CommandRegistryContext";
@@ -133,6 +134,11 @@ function AppInner() {
     prevWorkspaceRef.current = selectedWorkspace;
   }, [selectedWorkspace, telemetry]);
 
+  // Tell GitStatusStore which workspace is active (for prioritized 1s refresh)
+  useEffect(() => {
+    setActiveWorkspace(selectedWorkspace?.workspaceId ?? null);
+  }, [selectedWorkspace?.workspaceId]);
+
   // Track last-read timestamps for unread indicators
   const { lastReadTimestamps, onToggleUnread } = useUnreadTracking(selectedWorkspace);
 

src/browser/stores/GitStatusStore.ts

@@ -19,7 +19,7 @@ import { RefreshController } from "@/browser/utils/RefreshController";
  * - Lives outside React lifecycle (stable references)
  * - Event-driven updates (no polling):
  *   - Initial subscription triggers immediate fetch
- *   - File-modifying tools trigger debounced refresh (3s)
+ *   - File-modifying tools trigger debounced refresh (1s active, 3s background)
  *   - Window focus triggers refresh for visible workspaces
  *   - Explicit invalidation (branch switch, etc.)
  * - Manages git fetch with exponential backoff
@@ -31,6 +31,7 @@ import { RefreshController } from "@/browser/utils/RefreshController";
 
 // Configuration
 const MAX_CONCURRENT_GIT_OPS = 5;
+const ACTIVE_WORKSPACE_DEBOUNCE_MS = 1000; // 1s for active workspace (vs 3s background)
 
 // Fetch configuration - aggressive intervals for fresh data
 const FETCH_BASE_INTERVAL_MS = 3 * 1000; // 3 seconds
@@ -53,7 +54,12 @@ export class GitStatusStore {
   // File modification subscription
   private fileModifyUnsubscribe: (() => void) | null = null;
 
+  // Active workspace gets faster refresh (1s vs 3s debounce)
+  private activeWorkspaceId: string | null = null;
+  private activeWorkspaceTimer: ReturnType<typeof setTimeout> | null = null;
+
   // RefreshController handles debouncing, focus/visibility, and in-flight guards
+  // Used for background workspaces (3s debounce)
   private readonly refreshController: RefreshController;
 
   setClient(client: RouterClient<AppRouter>) {
@@ -113,6 +119,14 @@ export class GitStatusStore {
     });
   }
 
+  /**
+   * Set the active workspace for prioritized refresh (1s debounce vs 3s).
+   * Call when workspace selection changes.
+   */
+  setActiveWorkspace(workspaceId: string | null): void {
+    this.activeWorkspaceId = workspaceId;
+  }
+
   /**
    * Invalidate status for a workspace, clearing cache and triggering immediate refresh.
    * Call after operations that change git state (e.g., branch switch).
@@ -468,6 +482,10 @@ export class GitStatusStore {
     this.fetchCache.clear();
     this.fileModifyUnsubscribe?.();
     this.fileModifyUnsubscribe = null;
+    if (this.activeWorkspaceTimer) {
+      clearTimeout(this.activeWorkspaceTimer);
+      this.activeWorkspaceTimer = null;
+    }
     this.refreshController.dispose();
   }
 
@@ -490,8 +508,19 @@ export class GitStatusStore {
         return;
       }
 
-      // RefreshController handles debouncing, focus gating, and in-flight guards
-      this.refreshController.schedule();
+      // Active workspace gets faster refresh (1s) via dedicated timer
+      if (workspaceId === this.activeWorkspaceId) {
+        if (this.activeWorkspaceTimer) {
+          clearTimeout(this.activeWorkspaceTimer);
+        }
+        this.activeWorkspaceTimer = setTimeout(() => {
+          this.activeWorkspaceTimer = null;
+          this.refreshController.requestImmediate();
+        }, ACTIVE_WORKSPACE_DEBOUNCE_MS);
+      } else {
+        // Background workspaces use standard 3s debounce via RefreshController
+        this.refreshController.schedule();
+      }
     });
   }
 }
@@ -542,3 +571,11 @@ export function invalidateGitStatus(workspaceId: string): void {
   const store = getGitStoreInstance();
   store.invalidateWorkspace(workspaceId);
 }
+
+/**
+ * Set the active workspace for prioritized git status refresh (1s vs 3s debounce).
+ */
+export function setActiveWorkspace(workspaceId: string | null): void {
+  const store = getGitStoreInstance();
+  store.setActiveWorkspace(workspaceId);
+}