Fix frontend: remove Wails script tags, fix API mismatches, fix status bar
- Remove explicit /wails/ipc.js and /wails/runtime.js script tags from
index.html (Wails v2 auto-injects its runtime, explicit tags cause 404s
that block window.runtime and window.go from loading)
- Fix SecretStoreStatus() → IsSecretStoreInitialised() + IsSecretStoreUnlocked()
- Fix Connect() → ConnectSession()
- Fix QuickConnect(proto, host, port) → ConnectQuick(profileObject)
- Fix ImportProfilesDialog()/ExportProfilesDialog() → SelectFile/ExportProfiles/SaveFile
- Fix CloseSession() → DisconnectSession()
- Fix TestConnection() → show notification (method doesn't exist in backend)
- Fix SaveCapture() → SaveSessionCapture()
- Fix updateStatusBar() to use existing #status-connection, #status-session-count,
and #status-vault spans instead of replacing the entire status bar innerHTML