diff --git a/home/apps/profile/matrix.json b/home/apps/profile/matrix.json
index d54e61f8f..83dba07d4 100644
--- a/home/apps/profile/matrix.json
+++ b/home/apps/profile/matrix.json
@@ -3,6 +3,7 @@
   "description": "Your Matrix profile page",
   "runtime": "vite",
   "category": "social",
+  "icon": "profile",
   "version": "1.0.0",
   "slug": "profile",
   "runtimeVersion": "^1.0.0",
diff --git a/shell/src/lib/error-boundary-utils.ts b/shell/src/lib/error-boundary-utils.ts
index 9e6398bda..3d179272a 100644
--- a/shell/src/lib/error-boundary-utils.ts
+++ b/shell/src/lib/error-boundary-utils.ts
@@ -16,7 +16,8 @@ export function describeUnknownError(error: unknown): string {
   if (error instanceof globalThis.Error) return `${error.name}: ${error.message}`;
   try {
     return String(error);
-  } catch {
+  } catch (stringifyError) {
+    void stringifyError;
     return typeof error;
   }
 }
diff --git a/tests/gateway/apps.test.ts b/tests/gateway/apps.test.ts
index 5f7b52b42..0a8d61cd9 100644
--- a/tests/gateway/apps.test.ts
+++ b/tests/gateway/apps.test.ts
@@ -262,7 +262,7 @@ describe("T711: GET /api/apps", () => {
     expect(names).toContain("Timer");
   });
 
-  it("ships icons for every default app manifest", () => {
+  it("requires every default app manifest to declare a shipped icon", () => {
     const repoRoot = resolve(fileURLToPath(new URL("../..", import.meta.url)));
     const appsRoot = join(repoRoot, "home/apps");
     const iconsRoot = join(repoRoot, "home/system/icons");
@@ -287,7 +287,9 @@ describe("T711: GET /api/apps", () => {
           continue;
         }
         const manifest = JSON.parse(readFileSync(fullPath, "utf8")) as { icon?: unknown };
-        if (typeof manifest.icon === "string" && !shippedIcons.has(manifest.icon)) {
+        if (typeof manifest.icon !== "string") {
+          missing.push(`${fullPath.replace(`${repoRoot}/`, "")}: missing icon`);
+        } else if (!shippedIcons.has(manifest.icon)) {
           missing.push(`${fullPath.replace(`${repoRoot}/`, "")}: ${manifest.icon}`);
         }
       }
diff --git a/tests/shell/error-boundary-utils.test.ts b/tests/shell/error-boundary-utils.test.ts
new file mode 100644
index 000000000..8e3af142a
--- /dev/null
+++ b/tests/shell/error-boundary-utils.test.ts
@@ -0,0 +1,15 @@
+import { describe, expect, it } from "vitest";
+
+import { describeUnknownError } from "../../shell/src/lib/error-boundary-utils";
+
+describe("describeUnknownError", () => {
+  it("falls back to the original value type when string coercion throws", () => {
+    const errorLikeValue = {
+      [Symbol.toPrimitive]() {
+        throw new TypeError("string coercion failed");
+      },
+    };
+
+    expect(describeUnknownError(errorLikeValue)).toBe("object");
+  });
+});