feat(cli): default focus to logs panel and tighten splash + log row layout

- Default activeSection is now "logs" so the live log feed is what the
  user sees first when running `fn`.
- Splash drops the ASCII circle brand mark; only the FUSION block-letter
  word and tagline remain. The splash always pins to the top-left rather
  than centering, so it doesn't shift on resize. Compact terminals show
  plain "FUSION" text instead of block letters.
- Log rows render as a single Text with inline-colored spans (marker,
  timestamp, level, prefix, message). Prefix sits in a fixed 14-char
  slot so the message column aligns across rows, and the selection
  highlight now spans the full row width.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

packages/cli/src/commands/dashboard-tui/__tests__/app.test.tsx

@@ -60,23 +60,17 @@ afterEach(() => {
 });
 
 describe("DashboardApp smoke", () => {
-  it("renders the splash brand mark and tagline before systemInfo arrives", () => {
+  it("renders the splash logo and tagline before systemInfo arrives", () => {
     const controller = newController();
     const { lastFrame, unmount } = render(<DashboardApp controller={controller} />);
     const frame = lastFrame() ?? "";
-    expect(frame).toContain("╭─────╮");
+    // Block-letter "F" opens with this run on wide terminals; on narrow
+    // terminals the compact layout shows plain "FUSION".
+    expect(frame).toMatch(/███████╗|FUSION/);
     expect(frame).toContain("AI coding agent dashboard");
     unmount();
   });
 
-  it("reveals the FUSION block letters after the wipe-in animation runs", async () => {
-    const controller = newController();
-    const { lastFrame, unmount } = render(<DashboardApp controller={controller} />);
-    await new Promise((r) => setTimeout(r, 800));
-    expect(lastFrame() ?? "").toContain("███████╗");
-    unmount();
-  });
-
   it("renders system panel content once setSystemInfo fires", () => {
     const controller = newController();
     const { lastFrame, unmount, rerender } = render(<DashboardApp controller={controller} />);