fix: add up-to-date state so Check for updates gives visible feedback

When electron-updater reports no update available, the service now
transitions to 'up-to-date' instead of reverting silently to 'idle'.
The troubleshooting UI shows a green check icon, 'Up to date' label,
and 'You are running the latest version of Aryx.' description.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

src/main/services/autoUpdater.ts

@@ -151,7 +151,7 @@ export class AutoUpdateService {
   };
 
   private readonly notAvailableListener = () => {
-    this.publishStatus({ state: 'idle' });
+    this.publishStatus({ state: 'up-to-date' });
   };
 
   private readonly progressListener = (progress: AutoUpdateProgressLike) => {

src/renderer/components/SettingsPanel.tsx

@@ -1,5 +1,5 @@
 import { useEffect, useState, type ReactNode } from 'react';
-import { ChevronLeft, ChevronRight, Code, Cpu, FolderOpen, Palette, Plus, RefreshCw, Server, TriangleAlert, Workflow, Wrench } from 'lucide-react';
+import { ChevronLeft, ChevronRight, CircleCheck, Code, Cpu, FolderOpen, Palette, Plus, RefreshCw, Server, TriangleAlert, Workflow, Wrench } from 'lucide-react';
 
 import { CopilotStatusCard } from '@renderer/components/CopilotStatusCard';
 import { PatternEditor } from '@renderer/components/PatternEditor';
@@ -859,6 +859,8 @@ function TroubleshootingSection({
     switch (updateStatus.state) {
       case 'checking':
         return 'Checking for updates…';
+      case 'up-to-date':
+        return 'Up to date';
       case 'available':
         return `Update available: v${updateStatus.version ?? 'unknown'}`;
       case 'downloading':
@@ -876,6 +878,8 @@ function TroubleshootingSection({
     switch (updateStatus.state) {
       case 'checking':
         return 'Contacting the update server…';
+      case 'up-to-date':
+        return 'You are running the latest version of Aryx.';
       case 'available':
       case 'downloading':
         return 'A new version is being downloaded and will be installed automatically.';
@@ -922,11 +926,13 @@ function TroubleshootingSection({
               onClick={() => void handleCheckForUpdates()}
               type="button"
             >
-              <span className="text-[var(--color-text-muted)] transition-all duration-200 group-hover:text-[var(--color-text-secondary)]">
+              <span className={`transition-all duration-200 ${updateStatus.state === 'up-to-date' ? 'text-[var(--color-status-success)]' : 'text-[var(--color-text-muted)] group-hover:text-[var(--color-text-secondary)]'}`}>
-                <RefreshCw className={`size-4 ${isChecking ? 'animate-spin' : ''}`} />
+                {updateStatus.state === 'up-to-date'
+                  ? <CircleCheck className="size-4" />
+                  : <RefreshCw className={`size-4 ${isChecking ? 'animate-spin' : ''}`} />}
               </span>
               <div className="min-w-0 flex-1">
-                <span className={`text-[13px] font-medium ${updateStatus.state === 'error' ? 'text-[var(--color-status-error)]' : 'text-[var(--color-text-primary)]'}`}>
+                <span className={`text-[13px] font-medium ${updateStatus.state === 'error' ? 'text-[var(--color-status-error)]' : updateStatus.state === 'up-to-date' ? 'text-[var(--color-status-success)]' : 'text-[var(--color-text-primary)]'}`}>
                   {getUpdateLabel()}
                 </span>
                 <p className="mt-0.5 text-[12px] text-[var(--color-text-muted)]">{getUpdateDescription()}</p>

src/shared/contracts/ipc.ts

@@ -175,7 +175,7 @@ export interface SetTerminalHeightInput {
   height?: number;
 }
 
-export type UpdateStatusState = 'idle' | 'checking' | 'available' | 'downloading' | 'downloaded' | 'error';
+export type UpdateStatusState = 'idle' | 'checking' | 'up-to-date' | 'available' | 'downloading' | 'downloaded' | 'error';
 
 export interface UpdateDownloadProgress {
   bytesPerSecond: number;

tests/main/autoUpdater.test.ts

@@ -148,6 +148,22 @@ describe('AutoUpdateService', () => {
     ]);
   });
 
+  test('transitions to up-to-date when no update is available', () => {
+    const updater = new FakeUpdater();
+    const service = new AutoUpdateService({ isPackaged: true, updater });
+    const statuses: UpdateStatus[] = [];
+    service.onStatus((status) => statuses.push(status));
+
+    updater.emit('checking-for-update');
+    updater.emit('update-not-available', {});
+
+    expect(statuses).toEqual([
+      { state: 'checking' },
+      { state: 'up-to-date' },
+    ]);
+    expect(service.getStatus()).toEqual({ state: 'up-to-date' });
+  });
+
   test('reports updater errors and only installs once an update is downloaded', () => {
     const updater = new FakeUpdater();
     const service = new AutoUpdateService({ isPackaged: true, updater });