diff --git a/src/main/index.js b/src/main/index.js
index f047bc3..11bee62 100644
--- a/src/main/index.js
+++ b/src/main/index.js
@@ -2260,7 +2260,7 @@ ipcMain.on('app:quit', () => {
 });
 
 ipcMain.on('app:open-external', (_event, url) => {
-  if (typeof url === 'string' && /^https?:\/\//i.test(url)) {
+  if (typeof url === 'string' && /^https:\/\//i.test(url)) {
     shell.openExternal(url).catch((e) => console.error('[app:open-external]', e));
   }
 });
diff --git a/src/main/updater/feed-config.js b/src/main/updater/feed-config.js
index 1df7c23..b25fdcd 100644
--- a/src/main/updater/feed-config.js
+++ b/src/main/updater/feed-config.js
@@ -1,33 +1,3 @@
-const REPO = 'amitwh/markdown-converter';
-
-const FEEDS = {
-  github: {
-    base: `https://github.com/${REPO}/releases/download`,
-  },
-  concreteinfo: {
-    base: 'https://updates.concreteinfo.co.in/v5',
-  },
-};
-
-function platformSuffix(platform) {
-  if (platform === 'darwin' || platform === 'mac') return 'mac';
-  if (platform === 'win32' || platform === 'windows') return 'windows';
-  return 'linux';
-}
-
-function feedForChannel(channel, version, platform) {
-  const suffix = platformSuffix(platform);
-  const f = FEEDS[channel] || FEEDS.github;
-  if (channel === 'github') {
-    return `${f.base}/v${version}/latest-${suffix}.yml`;
-  }
-  return `${f.base}/latest-${suffix}.yml`;
-}
-
-function resolveFeedUrl(channel, version, platform) {
-  return feedForChannel(channel, version, platform);
-}
-
 function feedConfigFor(channel) {
   if (channel === 'github') {
     return { provider: 'github', owner: 'amitwh', repo: 'markdown-converter' };
@@ -35,4 +5,4 @@ function feedConfigFor(channel) {
   return { provider: 'generic', url: 'https://updates.concreteinfo.co.in/v5' };
 }
 
-module.exports = { resolveFeedUrl, feedConfigFor, FEEDS };
\ No newline at end of file
+module.exports = { feedConfigFor };
diff --git a/src/renderer/components/UpdateBanner.tsx b/src/renderer/components/UpdateBanner.tsx
index 2f0a436..5b4206d 100644
--- a/src/renderer/components/UpdateBanner.tsx
+++ b/src/renderer/components/UpdateBanner.tsx
@@ -18,6 +18,17 @@ export function UpdateBanner() {
     );
   }
 
+  if (state === 'available') {
+    return (
+      <div data-testid="update-banner" className="bg-blue-50 border-b border-blue-200 px-4 py-2 text-sm">
+        A new version (v{version}) is available.{' '}
+        <button onClick={() => useUpdaterStore.getState().check()} className="underline">
+          Download now
+        </button>
+      </div>
+    );
+  }
+
   if (state === 'downloading') {
     return (
       <div data-testid="update-banner" className="bg-blue-50 border-b border-blue-200 px-4 py-2 text-sm">
@@ -41,4 +52,4 @@ export function UpdateBanner() {
   }
 
   return null;
-}
\ No newline at end of file
+}
diff --git a/src/renderer/components/modals/ThemeSettings.tsx b/src/renderer/components/modals/ThemeSettings.tsx
index d20091a..d677b20 100644
--- a/src/renderer/components/modals/ThemeSettings.tsx
+++ b/src/renderer/components/modals/ThemeSettings.tsx
@@ -10,10 +10,10 @@ export function ThemeSettings() {
     <div className="space-y-5 text-sm">
       <div>
         <Label>Mode</Label>
-        <RadioGroup value={theme} onValueChange={(v) => setSetting('theme', v as 'light' | 'dark' | 'auto')}>
+        <RadioGroup value={theme} onValueChange={(v) => setSetting('theme', v as 'light' | 'dark' | 'system')}>
           <div className="flex items-center gap-2"><RadioGroupItem value="light" id="theme-light" /><Label htmlFor="theme-light">Light</Label></div>
           <div className="flex items-center gap-2"><RadioGroupItem value="dark" id="theme-dark" /><Label htmlFor="theme-dark">Dark</Label></div>
-          <div className="flex items-center gap-2"><RadioGroupItem value="auto" id="theme-auto" /><Label htmlFor="theme-auto">Auto (system)</Label></div>
+          <div className="flex items-center gap-2"><RadioGroupItem value="system" id="theme-system" /><Label htmlFor="theme-system">System</Label></div>
         </RadioGroup>
       </div>
       <div>
diff --git a/tests/component/UpdateBanner.test.tsx b/tests/component/UpdateBanner.test.tsx
index cc7b92b..6c7ece5 100644
--- a/tests/component/UpdateBanner.test.tsx
+++ b/tests/component/UpdateBanner.test.tsx
@@ -40,10 +40,17 @@ describe('UpdateBanner', () => {
     expect(screen.getByText(/couldn.?t check/i)).toBeInTheDocument();
   });
 
+  test('shows download CTA when state is available', () => {
+    useUpdaterStore.setState({ state: 'available', version: '5.0.2' });
+    render(<UpdateBanner />);
+    expect(screen.getByText(/5\.0\.2/)).toBeInTheDocument();
+    expect(screen.getByText(/download/i)).toBeInTheDocument();
+  });
+
   test('restart button calls ipc.updater.install', () => {
     useUpdaterStore.setState({ state: 'ready', version: '5.0.2' });
     render(<UpdateBanner />);
     fireEvent.click(screen.getByRole('button', { name: /restart/i }));
     expect(useUpdaterStore.getState().install).toBeDefined();
   });
-});
\ No newline at end of file
+});
diff --git a/tests/unit/main/updater/feed-config.test.js b/tests/unit/main/updater/feed-config.test.js
index bf9515d..4a409bc 100644
--- a/tests/unit/main/updater/feed-config.test.js
+++ b/tests/unit/main/updater/feed-config.test.js
@@ -1,36 +1,5 @@
-const { resolveFeedUrl, feedConfigFor, FEEDS } = require('../../../../src/main/updater/feed-config');
+const { feedConfigFor } = require('../../../../src/main/updater/feed-config');
 
-describe('feed-config', () => {
-  test('resolves github channel to GitHub Releases feed', () => {
-    const url = resolveFeedUrl('github', '5.0.2', 'mac');
-    expect(url).toBe('https://github.com/amitwh/markdown-converter/releases/download/v5.0.2/latest-mac.yml');
-  });
-
-  test('resolves concreteinfo channel to CI feed', () => {
-    const url = resolveFeedUrl('concreteinfo', '5.0.2', 'mac');
-    expect(url).toBe('https://updates.concreteinfo.co.in/v5/latest-mac.yml');
-  });
-
-  test('resolves windows platform correctly', () => {
-    const url = resolveFeedUrl('github', '5.0.2', 'windows');
-    expect(url).toContain('latest-windows.yml');
-  });
-
-  test('resolves linux platform correctly', () => {
-    const url = resolveFeedUrl('github', '5.0.2', 'linux');
-    expect(url).toContain('latest-linux.yml');
-  });
-
-  test('falls back to github on unknown channel', () => {
-    const url = resolveFeedUrl('something-weird', '5.0.2', 'mac');
-    expect(url).toContain('github.com');
-  });
-
-  test('exports both feeds as constants', () => {
-    expect(FEEDS.github).toBeDefined();
-    expect(FEEDS.concreteinfo).toBeDefined();
-  });
-});
 describe('feedConfigFor', () => {
   test('returns github provider config for github channel', () => {
     const config = feedConfigFor('github');