fix: ssh connect flow never fired + 120s host-key prompt budget

- Workspace: saved-credential connections now call connect() directly;
  ConnectFlow only rendered a connecting spinner without ever firing
  openSession, leaving attempts hung forever (root cause of the stuck
  '连接中' modal)
- Host-key prompt timeout raised 30s -> 120s (a security decision needs
  time; 30s aborted while users compare fingerprints)
- main: unhandledRejection/uncaughtException loggers; ssh diagnostics on
  error paths

src/main/index.ts

@@ -41,6 +41,13 @@ function createWindow(): void {
   }
 }
 
+process.on('unhandledRejection', (reason) => {
+  console.error('[main] unhandledRejection:', reason)
+})
+process.on('uncaughtException', (err) => {
+  console.error('[main] uncaughtException:', err)
+})
+
 app.whenReady().then(() => {
   registerIpc()
   // OS-level effects (login item, sleep blocker) must apply even if the

src/main/ssh.ts

@@ -53,7 +53,9 @@ export interface SshServiceDeps {
   timeoutMs?: { prompt: number; connect: number }
 }
 
-const DEFAULT_TIMEOUTS = { prompt: 30_000, connect: 15_000 }
+// Host-key confirmation is a security decision — users may take time to
+// compare fingerprints. 30s timed out on people who merely screenshot it.
+const DEFAULT_TIMEOUTS = { prompt: 120_000, connect: 15_000 }
 
 /**
  * Open an ssh session (connect + auth + open shell) for `conn`.
@@ -107,7 +109,8 @@ export async function connectSsh(
     try {
       fingerprint = fingerprintOf(hostKey)
       status = deps.knownHosts.check(conn.host, conn.port, hostKey).status
-    } catch {
+    } catch (err) {
+      console.error(`[ssh] knownHosts.check threw: ${(err as Error).message}`)
       fingerprint = fingerprintOf(hostKey)
       status = 'new'
     }
@@ -287,7 +290,10 @@ function promptUser(
  */
 export function resolveHostKey(promptId: string, action: 'accept' | 'reject'): void {
   const pending = pendingPrompts.get(promptId)
-  if (!pending) return
+  if (!pending) {
+    console.error(`[ssh] resolveHostKey: no pending prompt ${promptId}`)
+    return
+  }
   clearTimeout(pending.timer)
   pendingPrompts.delete(promptId)
   pending.resolve(action === 'accept')

src/renderer/src/workspace/Workspace.tsx

@@ -248,9 +248,21 @@ export default function Workspace({ onOpenSettings }: WorkspaceProps): React.JSX
     [message]
   )
 
-  const handleConnectRequest = useCallback((conn: SshConnection): void => {
-    setRequestedConn(conn)
-  }, [])
+  const handleConnectRequest = useCallback(
+    (conn: SshConnection): void => {
+      // Ask-at-connect connections go through the secret prompt first; saved
+      // credentials must connect IMMEDIATELY — routing them through ConnectFlow
+      // would only ever *render* a "connecting" spinner without firing openSession.
+      const needsPassword = conn.auth === 'password' && conn.askPasswordAtConnect
+      const needsPassphrase = conn.auth === 'privateKey' && conn.askPassphraseAtConnect
+      if (needsPassword || needsPassphrase) {
+        setRequestedConn(conn)
+        return
+      }
+      void connect(conn, {})
+    },
+    [connect]
+  )
 
   const handleConnectCancel = useCallback((): void => {
     setRequestedConn(null)