fix: preserve image attachments in live and restored conversations

electron/coding-runtime/pi/runtime.ts

@@ -104,7 +104,9 @@ export interface PiConversationRuntimeOptions {
   pool: PiWorkerPool;
   registry: PiSessionRegistry;
   resolveModel(model: ProductModelRef): Promise<PiProviderSelection>;
-  resolveImages?(attachments: Array<{ attachmentId: string }>): Promise<unknown[]>;
+  resolveImages?(attachments: Array<{ attachmentId: string }>): Promise<Array<{
+    type: 'image'; data: string; mimeType: string;
+  }>>;
   projectImage?: PiEventProjectorOptions['projectImage'];
   createId?(kind: RuntimeIdKind): string;
   now?: () => number;
@@ -813,9 +815,17 @@ export class PiConversationRuntime implements CodingConversationRuntime {
         clientRequestId: input.clientRequestId,
         role: 'user',
         status: 'optimistic',
-        blocks: input.text.length > 0
-          ? [{ kind: 'text', id: `${messageId}:content:0`, text: input.text, status: 'complete' }]
-          : [],
+        blocks: [
+          ...(input.text.length > 0
+            ? [{ kind: 'text' as const, id: `${messageId}:content:0`, text: input.text, status: 'complete' as const }]
+            : []),
+          ...input.attachments.map(({ attachmentId }, index) => ({
+            kind: 'image' as const,
+            id: `${messageId}:content:${index + (input.text.length > 0 ? 1 : 0)}`,
+            attachmentId,
+            mime: images[index].mimeType,
+          })),
+        ],
       },
     });
     const command: PiRpcCommand = {