Phase 2: SSH & session management — add open/edit/delete/duplicate/import/export and SSH placeholders

[delichik]

Motivation

• Implement Phase 2 (SSH & session management MVP) features to let users open, save, edit, delete, duplicate, import and export session profiles and to provide clear UX when SSH backend is not yet implemented.
• Surface host-key and credential storage boundaries so front-end and back-end have explicit contracts for secrets and host-key policy handling.

Description

• Frontend: extended QuickConnectPanel to support password/private-key/passphrase/host-key policy and edit mode, wired into App flows for opening, saving and editing sessions, and added UI for import/export and per-session actions in SessionSidebar; StatusBar now shows operation messages. (files: src/features/sessions/QuickConnectPanel.tsx, src/features/sessions/SessionSidebar.tsx, src/app/App.tsx, src/components/StatusBar.tsx, src/styles/global.css).
• Types & IPC: added HostKeyPolicy, HostKeyState, SessionExportBundle, extended QuickConnectDraft, and new IPC helpers deleteSession, duplicateSession, exportSessions, importSessions; preview-mode localStorage sanitization ensures credential refs are removed during export/import. (files: src/bindings/types.ts, src/bindings/ipc.ts).
• Backend (Rust): added config store support for delete_session, duplicate_session, export_sessions, and import_sessions with validation and scrubbing of credential_ref, registered new Tauri commands (sessions_delete, sessions_duplicate, sessions_export, sessions_import), introduced SSH host-key policy/record types and a credential-store trait stub, and changed terminal SSH placeholder to emit a clear notice and mark the runtime failed instead of staying connecting. (files: src-tauri/src/config/mod.rs, src-tauri/src/commands/mod.rs, src-tauri/src/lib.rs, src-tauri/src/ssh/mod.rs, src-tauri/src/crypto/mod.rs, src-tauri/src/terminal/mod.rs).
• Behavior notes: passwords and passphrases are treated as ephemeral inputs (not persisted or exported); exported bundles default to scrubbing credential references; opening a saved session converts SessionProfile into a QuickConnectDraft and reuses the existing terminal open flow.

Testing

• Ran npm run typecheck (TypeScript checks) and it succeeded.
• Performed front-end production build with npm run build / Vite and it succeeded.
• Ran cargo fmt successfully and git diff --check passed.
• Ran cargo check for the Rust backend but it failed in this environment due to a missing system dependency required by glib-sys (glib-2.0.pc / pkg-config); this is an environment issue rather than a code error and will block local Rust build in this container until system packages are available.

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Codex Task