fix: Resolve repository URL for install/update (registry + install fallbacks)

src/frontend/src/app.tsx

@@ -111,6 +111,7 @@ export function App() {
       if (existing) {
         existing.origin = 'both'
         existing.remoteSource = r.source
+        existing.url = r.url || existing.url
         existing.latestVersion = r.version
         existing.title = r.title || existing.title
         existing.vendor = r.vendor || existing.vendor

src/frontend/src/lib/types.ts

@@ -14,6 +14,7 @@ export interface RegistryItem {
     version: string
     image?: string
     source?: string
+    url?: string
     title?: string
     vendor?: string
     author?: string
@@ -64,6 +65,7 @@ export interface Container {
 
     // Fields populated by remote Git Registry
     source?: string;
+    url?: string;
     version?: string;
 
     // Optional properties for update state