Q50: work moved to review gets a reviewer; review closes with the verdict

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/main/services/avatar-values.ts

@@ -0,0 +1,22 @@
+/** Avatar colors persist as #rrggbb; anything else is a caller bug. */
+export function normalizeAvatarColor(value: string): string | null {
+  const color = value.trim();
+  if (!color) return null;
+  if (!/^#[0-9a-fA-F]{6}$/.test(color)) throw new Error("Avatar color must be a #rrggbb hex value.");
+  return color.toLowerCase();
+}
+
+/** Portraits are small base64 data URLs; the cap keeps the snapshot from ballooning. */
+const MAX_AVATAR_IMAGE_CHARS = 300_000;
+
+export function normalizeAvatarImage(value: string): string | null {
+  const image = value.trim();
+  if (!image) return null;
+  if (!/^data:image\/(png|jpeg|webp);base64,[A-Za-z0-9+/=]+$/.test(image)) {
+    throw new Error("Avatar image must be a base64 data URL (png, jpeg, or webp).");
+  }
+  if (image.length > MAX_AVATAR_IMAGE_CHARS) {
+    throw new Error("Avatar image is too large - upload a smaller picture.");
+  }
+  return image;
+}