feat(FN-4671): complete Step 1 — add ready and startup duration state

Fusion-Task-Id: FN-4671
Fusion-Task-Lineage: d6a084c7-eafd-4775-8284-8dd6d9eeb842

packages/cli/src/commands/dashboard-tui/controller.ts

@@ -85,6 +85,7 @@ export class DashboardTUI {
   // changes or the split is no longer rendered.
   narrowLogSplitFocused = false;
   loadingStatus = "Starting…";
+  isReady = false;
   mode: "status" | "interactive" = "status";
   // When true, sampleSystemStats() kills any running vitest processes if
   // system memory usage crosses 90%. Toggled by [v] in the Utilities panel.
@@ -195,6 +196,7 @@ export class DashboardTUI {
       logsViewportStart: this.logsViewportStart,
       narrowLogSplitFocused: this.narrowLogSplitFocused,
       loadingStatus: this.loadingStatus,
+      isReady: this.isReady,
       mode: this.mode,
       interactiveData: this.interactiveData,
       interactiveView: this.interactiveView,
@@ -220,6 +222,10 @@ export class DashboardTUI {
     return this.isRunning;
   }
 
+  get ready(): boolean {
+    return this.isReady;
+  }
+
   setCallbacks(callbacks: TUICallbacks): void {
     this.callbacks = callbacks;
     this.notify();
@@ -403,6 +409,11 @@ export class DashboardTUI {
     this.notify();
   }
 
+  setReady(ready: boolean): void {
+    this.isReady = ready;
+    this.notify();
+  }
+
   setInteractiveData(data: InteractiveData): void {
     this.interactiveData = data;
     this.notify();

packages/cli/src/commands/dashboard-tui/state.ts

@@ -20,6 +20,7 @@ export interface SystemInfo {
   engineMode: "dev" | "active" | "paused";
   fileWatcher: boolean;
   startTimeMs: number;
+  startupDurationMs?: number;
 }
 
 export interface TaskStats {
@@ -347,6 +348,7 @@ export interface DashboardState {
   // pane has key focus (vs. the top main panel).
   narrowLogSplitFocused: boolean;
   loadingStatus: string;
+  isReady: boolean;
   mode: AppMode;
   interactiveData: InteractiveData | null;
   interactiveView: InteractiveView;
@@ -392,6 +394,7 @@ export function createInitialState(): DashboardState {
     logsViewportStart: 0,
     narrowLogSplitFocused: false,
     loadingStatus: "Starting…",
+    isReady: false,
     mode: "status",
     interactiveData: null,
     interactiveView: "board",