fix(agents): restore missing runtime helpers and sandbox types

src/agents/pi-embedded-runner/run/images.ts

@@ -2,6 +2,8 @@ import type { ImageContent } from "@mariozechner/pi-ai";
 import path from "node:path";
 import { fileURLToPath } from "node:url";
 import type { SandboxFsBridge } from "../../sandbox/fs-bridge.js";
+import { resolveUserPath } from "../../../utils.js";
+import { loadWebMedia } from "../../../web/media.js";
 import { sanitizeImageBlocks } from "../../tool-images.js";
 import { log } from "../logger.js";
 
@@ -244,6 +246,30 @@ export function modelSupportsImages(model: { input?: string[] }): boolean {
   return model.input?.includes("image") ?? false;
 }
 
+function extractTextFromMessage(message: unknown): string {
+  if (!message || typeof message !== "object") {
+    return "";
+  }
+  const content = (message as { content?: unknown }).content;
+  if (typeof content === "string") {
+    return content;
+  }
+  if (!Array.isArray(content)) {
+    return "";
+  }
+  const textParts: string[] = [];
+  for (const part of content) {
+    if (!part || typeof part !== "object") {
+      continue;
+    }
+    const record = part as Record<string, unknown>;
+    if (record.type === "text" && typeof record.text === "string") {
+      textParts.push(record.text);
+    }
+  }
+  return textParts.join("\n").trim();
+}
+
 /**
  * Extracts image references from conversation history messages.
  * Scans user messages for image paths/URLs that can be loaded.