Fix terminal session state bugs: metadata status override, worktree attach race, remove unused panel

- Fix combineSessionState to prefer buffer terminal status (exited/closed/error)
  over stale metadata summary status, preventing UI from showing a terminal as
  running after the attach stream has recorded exit.

- Add selectedThreadDetail?.worktreePath to bootstrap effect deps so the terminal
  re-attaches with the correct worktree path when thread detail hydrates after
  initial attach.

- Remove unused ThreadTerminalPanel component that duplicated attach logic
  alongside ThreadTerminalRouteScreen.

Author: cursoragent

apps/mobile/src/features/terminal/ThreadTerminalPanel.tsx

@@ -725,6 +725,7 @@ export function ThreadTerminalRouteScreen() {
     router,
     selectedThread?.environmentId,
     selectedThread?.id,
+    selectedThreadDetail?.worktreePath,
     selectedThreadProject?.workspaceRoot,
     terminalId,
   ]);

apps/mobile/src/features/terminal/ThreadTerminalRouteScreen.tsx

@@ -242,16 +242,24 @@ function latestTimestamp(left: string | null, right: string | null): string | nu
   return Date.parse(left) >= Date.parse(right) ? left : right;
 }
 
+function isBufferTerminalStatus(buffer: TerminalBufferState): boolean {
+  return (
+    buffer.version > 0 &&
+    (buffer.status === "exited" || buffer.status === "closed" || buffer.status === "error")
+  );
+}
+
 function combineSessionState(
   summary: TerminalSummary | null,
   buffer: TerminalBufferState,
 ): TerminalSessionState {
+  const bufferTerminal = isBufferTerminalStatus(buffer);
   return {
     summary,
     buffer: buffer.buffer,
-    status: summary?.status ?? buffer.status,
+    status: bufferTerminal ? buffer.status : (summary?.status ?? buffer.status),
     error: buffer.error,
-    hasRunningSubprocess: summary?.hasRunningSubprocess ?? false,
+    hasRunningSubprocess: bufferTerminal ? false : (summary?.hasRunningSubprocess ?? false),
     updatedAt: latestTimestamp(summary?.updatedAt ?? null, buffer.updatedAt),
     version: buffer.version,
   };