fix(ui): shorten install/uninstall/update timeouts for async RPCs

With the backend flipped to async-spawn, install/uninstall/update return
immediately with a { status, package_id } envelope. Client timeouts of
45m/11m were a leftover from synchronous handlers and masked real RPC
failures.

Drop all install/uninstall/update RPC timeouts to 15s. Progress and
terminal state still arrive through the live state stream — the RPC
only needs to confirm the spawn was accepted.

Return-type annotations updated in rpc-client.ts and stores/server.ts.
Five direct rpcClient.call sites across Marketplace.vue, Discover.vue,
and MarketplaceAppDetails.vue updated with the shorter timeout.

neode-ui/src/views/Discover.vue

@@ -489,7 +489,7 @@ async function installApp(app: MarketplaceApp) {
   try {
     const installUrl = app.url || app.manifestUrl || app.s9pkUrl
     installingApps.set(app.id, { ...installingApps.get(app.id)!, status: 'downloading', progress: 30, message: 'Downloading package...' })
-    await rpcClient.call({ method: 'package.install', params: { id: app.id, url: installUrl, version: app.version } })
+    await rpcClient.call({ method: 'package.install', params: { id: app.id, url: installUrl, version: app.version }, timeout: 15000 })
     installingApps.set(app.id, { ...installingApps.get(app.id)!, status: 'installing', progress: 60, message: 'Installing package...' })
     startInstallPolling(app.id, 'Starting application...')
   } catch (err) {
@@ -511,7 +511,7 @@ async function installCommunityApp(app: MarketplaceApp) {
     if ((app as Record<string, unknown>).containerConfig) {
       installParams.containerConfig = (app as Record<string, unknown>).containerConfig
     }
-    await rpcClient.call({ method: 'package.install', params: installParams, timeout: 180000 })
+    await rpcClient.call({ method: 'package.install', params: installParams, timeout: 15000 })
     installingApps.set(app.id, { ...installingApps.get(app.id)!, status: 'installing', progress: 60, message: 'Starting container...' })
     startInstallPolling(app.id, 'Initializing application...')
   } catch (err) {

neode-ui/src/views/Marketplace.vue

@@ -418,7 +418,7 @@ async function installApp(app: MarketplaceApp) {
 
     installingApps.set(app.id, { ...installingApps.get(app.id)!, status: 'downloading', progress: 30, message: 'Downloading package...' })
 
-    await rpcClient.call({ method: 'package.install', params: { id: app.id, url: installUrl, version: app.version } })
+    await rpcClient.call({ method: 'package.install', params: { id: app.id, url: installUrl, version: app.version }, timeout: 15000 })
 
     installingApps.set(app.id, { ...installingApps.get(app.id)!, status: 'installing', progress: 60, message: 'Installing package...' })
 
@@ -447,7 +447,7 @@ async function installCommunityApp(app: MarketplaceApp) {
     await rpcClient.call({
       method: 'package.install',
       params: { id: app.id, dockerImage: app.dockerImage, version: app.version },
-      timeout: 180000
+      timeout: 15000
     })
 
     installingApps.set(app.id, { ...installingApps.get(app.id)!, status: 'installing', progress: 60, message: 'Starting container...' })

neode-ui/src/views/MarketplaceAppDetails.vue

@@ -546,7 +546,7 @@ async function installDependencies() {
           id: dep.id,
           dockerImage: dep.dockerImage,
         },
-        timeout: 180000,
+        timeout: 15000,
       })
       // Wait for package to register before installing next
       await new Promise(resolve => setTimeout(resolve, 2000))
@@ -579,7 +579,7 @@ async function installApp() {
           dockerImage: app.value.dockerImage,
           version: app.value.version,
         },
-        timeout: 180000,
+        timeout: 15000,
       })
     } else {
       // Package-based installation
@@ -591,6 +591,7 @@ async function installApp() {
           url: installUrl,
           version: app.value.version,
         },
+        timeout: 15000,
       })
     }