Added signature interaction for APOD Console: a boot overlay that gates initial rendering until both the simulated console startup and the real APOD fetch are ready.

• Added boot sequence lines:
  • > ESTABLISHING DEEP SPACE NETWORK LINK...
  • > AUTHENTICATING APOD UPLINK...
  • > DECODING IMAGE PACKET...
  • > LINK ESTABLISHED.
• Rendered the boot log in a <pre aria-live="polite">.
• Added a progress bar that fills during typing and enters a waiting animation if the APOD response is still pending.
• Cross-fades from the boot overlay into the main console only after boot and data are both complete.
• Added a fixed, low-opacity CRT scanline overlay across the viewport.
• Honored prefers-reduced-motion by skipping the boot typing sequence and going straight to the normal loading/content flow.
• Kept retry behavior on the plain loading path instead of replaying the boot overlay.