fix(session): Auto-accept Claude bypass permissions warning dialog

When Claude starts with --dangerously-skip-permissions, it shows a warning
dialog requiring Down+Enter to accept. This blocked automated polecat and
agent startup.

Added AcceptBypassPermissionsWarning() to tmux package that:
- Checks if the warning dialog is present by capturing pane content
- Only sends Down+Enter if "Bypass Permissions mode" text is found
- Avoids interfering with sessions that don't show the warning

Updated all Claude startup locations:
- session/manager.go (polecat sessions)
- cmd/up.go (mayor, witness, crew, polecat cold starts)
- daemon/daemon.go (crashed polecat restarts)
- daemon/lifecycle.go (role session starts)

internal/cmd/up.go

@@ -281,6 +281,10 @@ func ensureSession(t *tmux.Tmux, sessionName, workDir, role string) error {
 		if err := t.WaitForCommand(sessionName, constants.SupportedShells, constants.ClaudeStartTimeout); err != nil {
 			// Non-fatal
 		}
+
+		// Accept bypass permissions warning dialog if it appears.
+		_ = t.AcceptBypassPermissionsWarning(sessionName)
+
 		time.Sleep(constants.ShutdownNotifyDelay)
 
 		// Inject startup nudge for predecessor discovery via /resume
@@ -330,6 +334,10 @@ func ensureWitness(t *tmux.Tmux, sessionName, rigPath, rigName string) error {
 	if err := t.WaitForCommand(sessionName, constants.SupportedShells, constants.ClaudeStartTimeout); err != nil {
 		// Non-fatal
 	}
+
+	// Accept bypass permissions warning dialog if it appears.
+	_ = t.AcceptBypassPermissionsWarning(sessionName)
+
 	time.Sleep(constants.ShutdownNotifyDelay)
 
 	// Inject startup nudge for predecessor discovery via /resume
@@ -557,6 +565,10 @@ func ensureCrewSession(t *tmux.Tmux, sessionName, crewPath, rigName, crewName st
 	if err := t.WaitForCommand(sessionName, constants.SupportedShells, constants.ClaudeStartTimeout); err != nil {
 		// Non-fatal
 	}
+
+	// Accept bypass permissions warning dialog if it appears.
+	_ = t.AcceptBypassPermissionsWarning(sessionName)
+
 	time.Sleep(constants.ShutdownNotifyDelay)
 
 	// Inject startup nudge for predecessor discovery via /resume
@@ -661,6 +673,10 @@ func ensurePolecatSession(t *tmux.Tmux, sessionName, polecatPath, rigName, polec
 	if err := t.WaitForCommand(sessionName, constants.SupportedShells, constants.ClaudeStartTimeout); err != nil {
 		// Non-fatal
 	}
+
+	// Accept bypass permissions warning dialog if it appears.
+	_ = t.AcceptBypassPermissionsWarning(sessionName)
+
 	time.Sleep(constants.ShutdownNotifyDelay)
 
 	// Inject startup nudge for predecessor discovery via /resume