fix(run): decode binary WS frames in TerminalView so pty output actually renders

Server streams PTY output as binary WS frames, but the browser's default
binaryType ("blob") handed onmessage a Blob that never matched the
`typeof === "string"` check — every keystroke response was silently
dropped and the terminal stayed blank despite the backend streaming
correctly (verified via a raw ws client against the live tmux session).

client/src/components/run/__tests__/TerminalView.test.tsx

@@ -75,6 +75,15 @@ describe("TerminalView", () => {
     expect(writeMock).toHaveBeenCalledWith("hello");
   });
 
+  it("decodes binary ArrayBuffer frames (server sends PTY output as binary)", () => {
+    render(<TerminalView runId="ccam-lane-1" wsBaseUrl="ws://localhost:4820" />);
+    const ws = MockWebSocket.instances[0]!;
+    ws.onopen?.();
+    const bytes = new TextEncoder().encode("hello-binary").buffer;
+    ws.onmessage?.({ data: bytes });
+    expect(writeMock).toHaveBeenCalledWith("hello-binary");
+  });
+
   it("forwards terminal keystrokes as outgoing WS sends", () => {
     render(<TerminalView runId="ccam-lane-1" wsBaseUrl="ws://localhost:4820" />);
     const ws = MockWebSocket.instances[0]!;