fix(terminal): skip chat-panel terminals in workspace cd sync

[Raymond8196]

Problem

Switching sessions from the sidebar while a CLI agent TUI (codex/claude/gemini) was open in a chat-panel terminal injected cd '<path>' into the running TUI, corrupting it (e.g. codex echoed cd '/path' back as user input). The session switch itself succeeded, but the TUI was visually broken.

Root cause

useTerminalRepoSync broadcasts cd '<repoPath>' to every initialized terminal when the active workspace changes. Its guard only skipped readOnly and agent-pty- sessions, so chatpanel- terminals — which host interactive CLI agent TUIs — received the cd and got their TUI corrupted.

The session-list click → jumpToSessionAtom → followSessionRepo updates activeWorkspaceRootPathAtom, which fired the broadcast into the chat-panel terminal running the codex TUI.

This is the only "iterate the terminal pool + inject a command" call site in the codebase; all other write_pty writers target a single active terminal and are unaffected.

Fix

• Extract the guard into a pure selectRepoSyncTargets() so it is unit-testable without a React renderer (the host project ships neither @testing-library/react nor jsdom).
• Add isChatPanelTerminalId to the exclusion list.
• Add unit tests covering each excluded class (readOnly / agent-pty- / chatpanel- / uninitialized) plus a mixed case to lock the guard boundary.

Test plan

• npx vitest run src/hooks/terminal/__tests__/repoSyncTargets.test.ts — 6/6 pass
• Pre-commit hooks (lint-staged + eslint + prettier + scoped tsc) — clean
• Manual: open a codex TUI in a new session, click a session in another repo from the sidebar — TUI must stay clean, no cd injected.