Add open source trust signal in footer

Show that the app is open source with links to GitHub repos:
- Desktop App: github.com/DocSpring/chat_to_map_desktop
- Core Engine: github.com/DocSpring/chat_to_map

Links open in system browser via Tauri shell plugin.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: ndbroadbent

src/index.html

@@ -192,6 +192,12 @@ <h2>Something went wrong</h2>
 
       <footer>
         <p>Only text is uploaded — no images or videos. Processing happens securely in the cloud.</p>
+        <p class="open-source-notice">
+          This app is open source. View the code:
+          <a href="https://github.com/DocSpring/chat_to_map_desktop" target="_blank" rel="noopener">Desktop App</a>
+          ·
+          <a href="https://github.com/DocSpring/chat_to_map" target="_blank" rel="noopener">Core Engine</a>
+        </p>
       </footer>
     </div>
 

src/main.ts

@@ -211,6 +211,17 @@ function setupEventListeners(): void {
 
   // Setup debug panel
   setupDebugPanel(elements)
+
+  // Handle external links (open in system browser)
+  document.querySelectorAll('a[target="_blank"]').forEach((link) => {
+    link.addEventListener('click', (e) => {
+      e.preventDefault()
+      const href = (e.currentTarget as HTMLAnchorElement).href
+      if (href) {
+        openShell(href)
+      }
+    })
+  })
 }
 
 async function handleSelectCustomDb(): Promise<void> {

src/styles.css

@@ -546,6 +546,19 @@ footer {
   color: var(--color-text-secondary);
 }
 
+footer .open-source-notice {
+  margin-top: 8px;
+}
+
+footer .open-source-notice a {
+  color: var(--color-primary);
+  text-decoration: none;
+}
+
+footer .open-source-notice a:hover {
+  text-decoration: underline;
+}
+
 /* Scrollbar styling */
 .chat-list::-webkit-scrollbar {
   width: 8px;