resolve live sessions by claude's id, not the agent's session key

Every live row read 'Starting…' and linked nowhere, because the title lookup searched for a transcript
named after the session KEY. It isn't. The key is officer's handle for a conversation; the transcript is
named after Claude's own session id, and the mapping between them exists only inside the agent
(setClaudeSession/getClaudeSession). I assumed the two were the same and never checked — confirmed wrong
by looking for the ids from the officer log under ~/.claude/projects and finding nothing.

claude:list now reports claudeSessionId beside the key, the route resolves titles by that, and rows link
to it. Null means the first turn has not reported one yet, which is a genuinely unwritten conversation
and stays unlinked.

Needs the agent sidecar restarted to take effect — the new field comes from there.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

src/servers/sidecar/claude/claude-manager.ts

@@ -511,6 +511,9 @@ export function clearSession(sessionKey: string): void {
 export function listSessions(): LiveClaudeSession[] {
   return Array.from(sessions.values()).map((session) => ({
     sessionKey: session.sessionKey,
+    // The only place this mapping exists. Without it a caller cannot find the transcript, because the
+    // key is officer's handle and the filename is Claude's id.
+    claudeSessionId: getClaudeSession(session.sessionKey) ?? null,
     isGenerating: session.isGenerating,
     pendingTasks: session.pendingTasks.size,
   }));

src/servers/sidecar/protocol.ts

@@ -13,6 +13,14 @@ export type SidecarMessage = SidecarCommand | SidecarEvent;
  */
 export type LiveClaudeSession = {
   sessionKey: string;
+  /**
+   * Claude's own session id — the transcript's filename — or null before the first turn reports one.
+   *
+   * NOT the same as `sessionKey`, which is officer's handle for the conversation. Only the agent holds
+   * the mapping (`setClaudeSession`/`getClaudeSession`), so anything that wants to find the transcript
+   * has to be told it here. Assuming the two were equal made every live row unnameable and unlinkable.
+   */
+  claudeSessionId: string | null;
   isGenerating: boolean;
   pendingTasks: number;
 };