Replace all JSON file storage (connections, secrets, history, AI config,
conversations, sidebar layout) with a single SQLite database (dbx.db).
Auto-migrates existing JSON data on first launch, renaming old files to
.bak. Remove keyring dependency — passwords now stored in SQLite.
Refactor all database drivers, query execution, schema operations, and
business logic into a shared `dbx-core` crate. The Tauri desktop app
becomes a thin shell delegating to dbx-core, enabling future web and
CLI frontends to reuse the same core.
- Add ssh_key_passphrase field to ConnectionConfig model with full keyring lifecycle
- Pass passphrase to russh load_secret_key for encrypted SSH keys
- Add native file picker (FolderOpen icon) next to SSH key path input
- Add password-type input for key passphrase in connection dialog
- Make connection dialog form scrollable for short windows
- Fix alignment of key path input and browse button
- Add i18n keys (en + zh-CN)
During development, every Rust recompile changes the binary signature,
causing macOS to invalidate Keychain "Always Allow" and prompt for the
password on every hot reload. Switch to a JSON file store in debug
builds so dev workflow is uninterrupted; release builds still use the
system keychain.
t8y2