fix Claude secondary pane copy + false "session exited"

Two things surfaced in the secondary pane: the tab said "session 1"
while the banner said "secondary 1" — now both say "session N". And the
banner showed "session exited" right after starting, even though Claude
was alive: a transient tmux client process can exit during spawn while
the session itself is fine. pane.exit now verifies via `tmux has-session`
and only reports exited when the session is actually gone.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.pql/changelog/ticket_history/2026-05.sql

@@ -2196,3 +2196,4 @@ INSERT INTO ticket_history (ticket_id, field, old_value, new_value, changed_by,
 INSERT INTO ticket_history (ticket_id, field, old_value, new_value, changed_by, changed_at, created_at, updated_at, deleted_at, hash, canonical_version) VALUES ('T-147', 'status', 'backlog', 'in_progress', NULL, '2026-05-23 07:03:18', '2026-05-23 07:03:18', '2026-05-23 07:03:18', NULL, 'b0bc1949f98ef05a05717cef80ba194f', 1) ON CONFLICT(hash) DO NOTHING;
 INSERT INTO ticket_history (ticket_id, field, old_value, new_value, changed_by, changed_at, created_at, updated_at, deleted_at, hash, canonical_version) VALUES ('T-147', 'status', 'in_progress', 'done', NULL, '2026-05-23 07:06:54', '2026-05-23 07:06:54', '2026-05-23 07:06:54', NULL, 'b6b88954fdc04ecf7847dea204a92e14', 1) ON CONFLICT(hash) DO NOTHING;
 INSERT INTO ticket_history (ticket_id, field, old_value, new_value, changed_by, changed_at, created_at, updated_at, deleted_at, hash, canonical_version) VALUES ('T-149', 'status', 'backlog', 'in_progress', NULL, '2026-05-23 07:14:36', '2026-05-23 07:14:36', '2026-05-23 07:14:36', NULL, '75bb1fa2d964f284910201b1c15995b9', 1) ON CONFLICT(hash) DO NOTHING;
+INSERT INTO ticket_history (ticket_id, field, old_value, new_value, changed_by, changed_at, created_at, updated_at, deleted_at, hash, canonical_version) VALUES ('T-149', 'status', 'in_progress', 'done', NULL, '2026-05-23 07:27:32', '2026-05-23 07:27:32', '2026-05-23 07:27:32', NULL, 'd020ddfea99355676800af1e39249c85', 1) ON CONFLICT(hash) DO NOTHING;

.pql/changelog/tickets/2026-05.sql

@@ -2554,3 +2554,4 @@ INSERT INTO tickets (id, type, parent_id, title, description, status, priority,
 INSERT INTO tickets (id, type, parent_id, title, description, status, priority, assigned_to, team, decision_ref, created_at, updated_at, deleted_at, hash, canonical_version) VALUES ('T-148', 'task', 'T-132', 'Claude transcript disk-usage indicator + cleanup button', 'Surface transcript/session disk usage in the Claude panel with a cleanup affordance so the user can pick and choose what to remove. Per-session sizes (the <munged-cwd>/*.jsonl files + subagents/), a total, and a button to delete selected sessions'' transcripts. User-driven only — clide never auto-deletes transcript content. Future/''at some point'' per user. Relates to T-146 (session ids) and D-75.', 'backlog', 'low', NULL, NULL, NULL, '2026-05-23 07:03:18', '2026-05-23 07:03:18', NULL, '7bbe7f4baf80027516cc46cff93a8dfe', 1) ON CONFLICT(id) DO UPDATE SET type=excluded.type, parent_id=excluded.parent_id, title=excluded.title, description=excluded.description, status=excluded.status, priority=excluded.priority, assigned_to=excluded.assigned_to, team=excluded.team, decision_ref=excluded.decision_ref, updated_at=excluded.updated_at, deleted_at=excluded.deleted_at, hash=excluded.hash, canonical_version=excluded.canonical_version WHERE excluded.updated_at > tickets.updated_at OR (excluded.updated_at = tickets.updated_at AND excluded.hash > tickets.hash);
 INSERT INTO tickets (id, type, parent_id, title, description, status, priority, assigned_to, team, decision_ref, created_at, updated_at, deleted_at, hash, canonical_version) VALUES ('T-147', 'bug', 'T-132', 'Claude pane gets stuck waiting on a stale/legacy session', 'When the bound transcript (<munged-cwd>/<session-id>.jsonl) never appears — e.g. attaching via new-session -A to a session created before --session-id binding (T-146), or any unconnectable session — the pane shows ''Waiting for Claude…'' forever. Fix: before spawning, if the bound transcript for our deterministic session id does not exist, kill the clide tmux session of that exact name so new-session creates a clean session with our --session-id. SAFETY (hard requirement): only ever kill clide-initiated sessions — by exact clide-claude-<slug> name, on the private -L clide socket (a user''s terminal claude is never on that socket); never delete any transcript file. Also makes clean-install/first-run robust. Live-verify the stuck primary self-heals on relaunch and a secondary still gets a fresh independent session.', 'done', 'high', NULL, NULL, NULL, '2026-05-23 07:03:18', '2026-05-23 07:06:54', NULL, '4c08227959a8fe6905521ebdc42487c1', 1) ON CONFLICT(id) DO UPDATE SET type=excluded.type, parent_id=excluded.parent_id, title=excluded.title, description=excluded.description, status=excluded.status, priority=excluded.priority, assigned_to=excluded.assigned_to, team=excluded.team, decision_ref=excluded.decision_ref, updated_at=excluded.updated_at, deleted_at=excluded.deleted_at, hash=excluded.hash, canonical_version=excluded.canonical_version WHERE excluded.updated_at > tickets.updated_at OR (excluded.updated_at = tickets.updated_at AND excluded.hash > tickets.hash);
 INSERT INTO tickets (id, type, parent_id, title, description, status, priority, assigned_to, team, decision_ref, created_at, updated_at, deleted_at, hash, canonical_version) VALUES ('T-149', 'task', 'T-132', 'Native Claude pane startup banner (empty state)', 'Replace the bland ''Waiting for Claude…'' empty state with a native clide banner: clide logo, a Claude label (brand orange), the session role (primary/secondary N), the workspace path (home-collapsed), and the tmux session/status line, plus a ''warming up'' hint. Owned/native — no tmux capture-pane, no CC-internals coupling. ConversationView gains an optional emptyState widget; ClaudePane supplies a ClaudeBanner built from data it already has (repoRoot, statusLine, isPrimary).', 'in_progress', 'low', NULL, NULL, NULL, '2026-05-23 07:14:36', '2026-05-23 07:14:36', NULL, '741b021184df1596b364aa2d09167e85', 1) ON CONFLICT(id) DO UPDATE SET type=excluded.type, parent_id=excluded.parent_id, title=excluded.title, description=excluded.description, status=excluded.status, priority=excluded.priority, assigned_to=excluded.assigned_to, team=excluded.team, decision_ref=excluded.decision_ref, updated_at=excluded.updated_at, deleted_at=excluded.deleted_at, hash=excluded.hash, canonical_version=excluded.canonical_version WHERE excluded.updated_at > tickets.updated_at OR (excluded.updated_at = tickets.updated_at AND excluded.hash > tickets.hash);
+INSERT INTO tickets (id, type, parent_id, title, description, status, priority, assigned_to, team, decision_ref, created_at, updated_at, deleted_at, hash, canonical_version) VALUES ('T-149', 'task', 'T-132', 'Native Claude pane startup banner (empty state)', 'Replace the bland ''Waiting for Claude…'' empty state with a native clide banner: clide logo, a Claude label (brand orange), the session role (primary/secondary N), the workspace path (home-collapsed), and the tmux session/status line, plus a ''warming up'' hint. Owned/native — no tmux capture-pane, no CC-internals coupling. ConversationView gains an optional emptyState widget; ClaudePane supplies a ClaudeBanner built from data it already has (repoRoot, statusLine, isPrimary).', 'done', 'low', NULL, NULL, NULL, '2026-05-23 07:14:36', '2026-05-23 07:27:32', NULL, '1d922f79ed8f98bea75042af8662dd74', 1) ON CONFLICT(id) DO UPDATE SET type=excluded.type, parent_id=excluded.parent_id, title=excluded.title, description=excluded.description, status=excluded.status, priority=excluded.priority, assigned_to=excluded.assigned_to, team=excluded.team, decision_ref=excluded.decision_ref, updated_at=excluded.updated_at, deleted_at=excluded.deleted_at, hash=excluded.hash, canonical_version=excluded.canonical_version WHERE excluded.updated_at > tickets.updated_at OR (excluded.updated_at = tickets.updated_at AND excluded.hash > tickets.hash);