Fix gt mail inbox performance: bypass daemon for mail queries

Mail operations were taking 30+ seconds due to beads daemon auto-import
cycles. Each bd query would wait up to 5 seconds for auto-import to
complete, and with 3+ queries per inbox check, this added up.

The fix bypasses the daemon by passing --no-daemon to all bd commands
in the mail package. This is appropriate because:
- Mail queries are read-heavy and don't benefit from daemon caching
- Direct SQLite access is faster for one-off queries
- Avoids daemon auto-import/export cycle delays

Performance improvement: 31+ seconds → 1.2 seconds

Fixes: hq-b1o08

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

internal/mail/bd.go

@@ -39,7 +39,13 @@ func (e *bdError) ContainsError(substr string) bool {
 // beadsDir is the BEADS_DIR environment variable value.
 // extraEnv contains additional environment variables to set (e.g., "BD_IDENTITY=...").
 // Returns stdout bytes on success, or a *bdError on failure.
+//
+// Uses --no-daemon to bypass the beads daemon for direct database access.
+// This avoids 5+ second delays caused by daemon auto-import cycles (bd-xxxx).
+// Mail operations are read-heavy and don't benefit from daemon caching.
 func runBdCommand(args []string, workDir, beadsDir string, extraEnv ...string) ([]byte, error) {
+	// Prepend --no-daemon to avoid daemon auto-import delays
+	args = append([]string{"--no-daemon"}, args...)
 	cmd := exec.Command("bd", args...) //nolint:gosec // G204: bd is a trusted internal tool
 	cmd.Dir = workDir