feat(electrobun): session continuity — Claude JSONL listing, resume/continue sidecar support, session picker UI

ui-electrobun/src/shared/pty-rpc-schema.ts

@@ -389,6 +389,10 @@ export type PtyRPCRequests = {
       extraEnv?: Record<string, string>;
       additionalDirectories?: string[];
       worktreeName?: string;
+      /** Session continuity: 'new' (default), 'continue' (most recent), 'resume' (specific session). */
+      resumeMode?: "new" | "continue" | "resume";
+      /** Required when resumeMode='resume' — the Claude SDK session ID to resume. */
+      resumeSessionId?: string;
     };
     response: { ok: boolean; error?: string };
   };
@@ -477,6 +481,21 @@ export type PtyRPCRequests = {
     };
   };
 
+  /** List Claude SDK sessions from disk for a project CWD. */
+  "session.listClaude": {
+    params: { cwd: string };
+    response: {
+      sessions: Array<{
+        sessionId: string;
+        summary: string;
+        lastModified: number;
+        fileSize: number;
+        firstPrompt: string;
+        model: string;
+      }>;
+    };
+  };
+
   // ── btmsg RPC ──────────────────────────────────────────────────────────
 
   /** Register an agent in btmsg. */