Enhance canvas functionality by adding media preview capabilities and image upload handling. Introduce compressed image previews during uploads, improve media library integration, and implement retry logic for bridge edge creation. Update dashboard to display media previews and optimize image node handling.

components/media/__tests__/media-preview-utils.test.ts

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+import { describe, expect, it } from "vitest";
+
+import {
+  collectMediaStorageIdsForResolution,
+  resolveMediaPreviewUrl,
+} from "@/components/media/media-preview-utils";
+
+describe("media-preview-utils", () => {
+  it("collects preview ids first and includes original ids as fallback", () => {
+    const ids = collectMediaStorageIdsForResolution([
+      { storageId: "orig-1", previewStorageId: "preview-1" },
+      { storageId: "orig-2" },
+    ]);
+
+    expect(ids).toEqual(["preview-1", "orig-1", "orig-2"]);
+  });
+
+  it("resolves preview url first and falls back to original url", () => {
+    const previewFirst = resolveMediaPreviewUrl(
+      { storageId: "orig-1", previewStorageId: "preview-1" },
+      {
+        "preview-1": "https://cdn.example.com/preview.webp",
+        "orig-1": "https://cdn.example.com/original.jpg",
+      },
+    );
+
+    expect(previewFirst).toBe("https://cdn.example.com/preview.webp");
+
+    const fallbackToOriginal = resolveMediaPreviewUrl(
+      { storageId: "orig-1", previewStorageId: "preview-1" },
+      {
+        "orig-1": "https://cdn.example.com/original.jpg",
+      },
+    );
+
+    expect(fallbackToOriginal).toBe("https://cdn.example.com/original.jpg");
+  });
+});