feat: /last and bind button for previous Q/A context (v0.3.4)

After attaching a session, show a button and /last command that load the latest human/assistant turn via session.history so phone users can continue with context.

Co-authored-by: Cursor <cursoragent@cursor.com>

lib/history.d.ts

@@ -0,0 +1,28 @@
+import type { Context } from '@deepseek-ai/cordis';
+import type { Agent } from '@deepseek-ai/dsh-agent';
+export interface LastTurn {
+    userText?: string;
+    assistantText?: string;
+}
+type LooseEvent = {
+    type?: string;
+    data?: {
+        source?: {
+            kind?: string;
+        };
+        content?: unknown;
+        message?: {
+            content?: unknown;
+            source?: {
+                kind?: string;
+            };
+        };
+        text?: string;
+    };
+};
+/** Extract the latest human Q + assistant A from a session event list. */
+export declare function extractLastTurn(events: readonly LooseEvent[]): LastTurn;
+export declare function formatLastTurn(turn: LastTurn, maxEach?: number): string;
+/** Load last Q/A for a bound session (apiProxy history, else live agent events). */
+export declare function loadLastTurn(ctx: Context, sessionId: string, agent?: Agent): Promise<LastTurn>;
+export {};