fix(review): harden + wire remote-host SSH cases end-to-end (PR #145)

- UI: add the missing data-tab="case-remote" tab button; dispatch it through
  submitCaseModal()/switchCaseModalTab() to linkRemoteCase() (was dead code).
- Restore: restoreMuxSessions() now passes remote (muxSession.remote ??
  savedState.remote) into the Session constructor, so remote metadata round-trips
  on restart instead of reattaching from a local cwd / respawning LOCAL / being
  erased from state.json. Recovery tests added.
- Run flows: runClaude()/runShell() route remote cases through /api/quick-start
  (POST /api/sessions stat-validates workingDir locally); run*() skip the
  /api/*/status pre-check and omit inert config/env for remote cases.
- Quick-start: resolve the remote case BEFORE the local CLI availability gates and
  skip isCodex/Gemini/OpenCodeAvailable() when remote; REJECT
  envOverrides/effort/codex/gemini/openCode config for remote (they don't cross
  ssh) instead of silently dropping them.
- Injection: reject $, backtick, $( in remotePath + identityFile at the schema
  layer (they survive shellescape into the bash -c launch double-quote layer).
  Regression tests for $(...) and backtick payloads added.
- Remote socket/name: launch on a DEDICATED -L codeman-remote socket under a
  codeman-ssh-<id> name that fails a remote Codeman's SAFE_MUX_NAME_PATTERN, so a
  remote instance can't adopt the session; scope tmux set-options per-session
  (never -g) so they don't mutate other sessions.
- Kill: best-effort ssh 'tmux -L codeman-remote kill-session' on remote session
  kill (fire-and-forget, never blocks/throws the local kill) so the remote agent
  isn't orphaned forever.
- Probe: wire checkRemoteTmuxAvailable() into POST /api/quick-start (structured
  OPERATION_FAILED) and as courtesy validation in remote-link; add a default
  -o ConnectTimeout=10 to buildSshConnectionArgs (overridable via extraSshOptions).
- Command default: remote claude default is now
  'exec claude --dangerously-skip-permissions' (per-host override stays the escape
  hatch), mirroring local non-interactive semantics.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

test/session-attachment-history.test.ts

@@ -174,4 +174,24 @@ describe('session attachment history', () => {
     ).toBe('/tmp');
     expect(resolveMuxAttachCwd('/opt/projects/Codeman')).toBe('/opt/projects/Codeman');
   });
+
+  it('round-trips remote metadata through the Session constructor (restart-recovery contract)', () => {
+    // restoreMuxSessions() reconstructs recovered sessions via
+    // `new Session({ ..., remote: muxSession.remote ?? savedState.remote })`. If that
+    // remote does not survive toState(), the next persistSessionState() erases it from
+    // state.json AND the attach cwd falls back to the (nonexistent-locally) remote path.
+    const remote = {
+      hostId: 'gpu-box',
+      label: 'GPU Box',
+      host: '10.0.0.42',
+      username: 'ubuntu',
+      remotePath: '/home/ubuntu/work',
+      commands: { claude: 'exec claude --dangerously-skip-permissions' },
+    };
+    const restored = new Session({ workingDir: '/home/ubuntu/work', remote });
+    const state = restored.toState();
+    expect(state.remote).toEqual(remote);
+    // Recovered attach cwd must be a LOCAL path, never the remote-only workingDir.
+    expect(resolveMuxAttachCwd(state.workingDir, state.remote)).toBe('/tmp');
+  });
 });