diff --git a/apps/web/src/domains/chat/components/busy-indicator.test.tsx b/apps/web/src/domains/chat/components/busy-indicator.test.tsx
new file mode 100644
index 00000000000..e9c0472ca1d
--- /dev/null
+++ b/apps/web/src/domains/chat/components/busy-indicator.test.tsx
@@ -0,0 +1,59 @@
+/**
+ * Tests for `BusyIndicator`.
+ *
+ * The dot is a bare `<span>`, whose default `display: inline` makes the
+ * CSS box model ignore `width`/`height`. Inside a flex parent the dot is
+ * blockified and sizes correctly, but standalone (e.g. the avatar
+ * `ProgressBadge`) it would collapse to 0×0 and never paint. The
+ * `inline-block` class guarantees the dot lays out at its declared size
+ * regardless of its parent's layout. Uses happy-dom via the bun:test
+ * preload configured in `web/bunfig.toml`.
+ */
+
+import { afterEach, describe, expect, test } from "bun:test";
+
+import { cleanup, render } from "@testing-library/react";
+
+import { BusyIndicator } from "@/domains/chat/components/busy-indicator";
+
+afterEach(() => {
+  cleanup();
+});
+
+describe("BusyIndicator", () => {
+  test("is block-level so its size applies outside a flex parent", () => {
+    /**
+     * Tests that the dot is block-level and carries its declared size,
+     * so it paints even when its parent is not a flex container.
+     */
+
+    // GIVEN a 6px busy indicator rendered with no flex parent
+    const { container } = render(<BusyIndicator size={6} />);
+
+    // WHEN we read the rendered dot element
+    const dot = container.firstElementChild as HTMLElement;
+
+    // THEN it is block-level so width/height are not ignored
+    expect(dot.className).toContain("inline-block");
+
+    // AND it lays out at the requested size
+    expect(dot.style.width).toBe("6px");
+    expect(dot.style.height).toBe("6px");
+  });
+
+  test("uses the shared busy-pulse keyframe", () => {
+    /**
+     * Tests that the dot keeps the shared pulse class so its animation
+     * matches every other busy affordance in the app.
+     */
+
+    // GIVEN a default busy indicator
+    const { container } = render(<BusyIndicator size={8} />);
+
+    // WHEN we read the rendered dot element
+    const dot = container.firstElementChild as HTMLElement;
+
+    // THEN it carries the shared busy-indicator pulse class
+    expect(dot.className).toContain("busy-indicator");
+  });
+});
diff --git a/apps/web/src/domains/chat/components/busy-indicator.tsx b/apps/web/src/domains/chat/components/busy-indicator.tsx
index 325d1928a3c..bfb8ddcd9a3 100644
--- a/apps/web/src/domains/chat/components/busy-indicator.tsx
+++ b/apps/web/src/domains/chat/components/busy-indicator.tsx
@@ -14,7 +14,7 @@ export function BusyIndicator({ size = 8 }: { size?: number }) {
   return (
     <span
       aria-hidden="true"
-      className="busy-indicator shrink-0 rounded-full"
+      className="busy-indicator inline-block shrink-0 rounded-full"
       style={{
         width: size,
         height: size,
diff --git a/apps/web/src/domains/chat/components/chat-route-content.tsx b/apps/web/src/domains/chat/components/chat-route-content.tsx
index 91568ba4a4d..1646bb6ebc9 100644
--- a/apps/web/src/domains/chat/components/chat-route-content.tsx
+++ b/apps/web/src/domains/chat/components/chat-route-content.tsx
@@ -1170,6 +1170,7 @@ export function ChatRouteContent({
           customImageUrl={avatarImageUrl}
           size={40}
           interactive
+          isProcessing={activeConversationIsProcessing}
         />
       ) : null,
     greeting: editingApp ? buildEditAppGreeting(editingApp) : emptyStateGreeting,