serverjack v1.3.0

serverjack 1.3.0

New mark. The Prompt Jack logo, a terminal chevron next to a J-shaped plug, now appears in the page headers, the terminal's All sessions link, the browser favicon and the iPhone home-screen icon. SVG and PNG share one set of outlines, and refreshed icon URLs replace the artwork browsers had cached.

The README is repositioned around what the project is for, "Jack into your server", with a demo GIF and a five-bullet proof list under the screenshots, and a social preview image so links posted elsewhere show a card instead of a blank.

docs/FAQ.md is new: why not plain ttyd, why not the vendors' own remote control, why Tailscale and not a password, whether it phones home (no), and how to run it without Tailscale.

No behavior change. Same install, same security model, same tests.