In ESM (dev/tsx), __dirname is not a global. The previous fix (#70)
removed the import.meta.url fallback because tsup emits it as
import_meta.url in the CJS bundle, crashing at runtime. This left
__dirname undefined in dev mode.

Fix: use typeof guard with process.argv[1] as the ESM fallback.
Avoids import.meta.url entirely so the CJS bundle CI check passes.

* fix: session restore — persist sessions continuously and fix Recent Sessions resume (#74)

Sessions were only saved during shutdown, but a race condition between
bridge.close() and the server's deferred shutdown() meant sessions were
often never written to the DB. On macOS, closing the window without
quitting made this worse since terminals could exit before the eventual
quit triggered a save.

Fix by saving sessions on every state change (debounced) and on a 30s
periodic interval, so shutdown is just a safety net. Also fix Recent
Sessions resume: normalize paths for project lookup so the terminal gets
the correct project name (was being filtered out by the visibility hook),
and add error handling to prevent silent failures.

- Add auto-save to SessionManager (debounced + periodic with dirty flag)
- Wire scheduleSave() on session-created, session-exit, SessionStart hook
- Add normalizePath() for symlink/trailing-slash resolution
- Use normalized comparison in agent history and hook session linking
- Extract resolveResumeSessionId() with multi-tier fallback
- Extract resolveProjectName() for robust project matching
- Add try/catch to all resume handlers

* fix: address PR review — cache normalizePath, scoped fetch, cross-platform paths

- resolveResumeSessionId: try scoped fetch first (avoids global limit=20
  missing project sessions), then fall through to unscoped fallback
- resolveProjectName: use normalized path for basename fallback so
  trailing-slash paths don't produce 'untitled'
- Basename matching is now case-insensitive (comment was inaccurate)
- startAutoSave: call stopAutoSave first to prevent timer leaks on re-init
- persistNow: clear pending debounce timer to avoid redundant DB writes
- normalizePath: use path.normalize for cross-platform separator handling
- agent-history: cache normalizePath results per unique project path in
  the per-line loop to avoid repeated realpathSync syscalls
- pty-manager: cache normalized session paths at creation time so
  findUnlinkedSessionByCwd avoids per-iteration realpathSync
- Fix comment accuracy ("every state change" → actual trigger list)
- Update tests for 2-call pattern in resolveResumeSessionId

* fix: show project filter context in Recent Sessions and restore banner

- RecentSessionsPopover: header shows "· ProjectName" or "· All Projects"
- RecentSessionsCard: same treatment
- SessionRestoredBanner: shows project name when single project, or
  "N projects" when sessions span multiple projects

* fix: server crash in dev mode — __dirname undefined in ESM

In ESM (dev/tsx), __dirname is not a global. The previous fix (#70)
removed the import.meta.url fallback because tsup emits it as
import_meta.url in the CJS bundle, crashing at runtime. This left
__dirname undefined in dev mode.

Fix: use typeof guard with process.argv[1] as the ESM fallback.
Avoids import.meta.url entirely so the CJS bundle CI check passes.

* fix: prevent multiple terminals from resuming the same session

When restoring N sessions, resolveResumeSessionId used .find() which
always returned the most-recent match — all terminals got the same
session ID. Now accepts a `claimed` set that callers populate as each
ID is assigned, so subsequent lookups skip already-taken sessions.