feat: home page Server/CLI sections, /manage landing page, Docs in topbar (ATFS-juoe) master
- Split the hero into "Server" (Docker, SBC) and "CLI" (atfs CLI, new Manage UI link) sections with heading labels. - New /manage/ page: a login prompt when signed out, straight-through redirect for an account with exactly one manageable instance (mirroring ManageMenu's own logic), a picker list for several. - Moved the hero's docs link into a persistent "Docs" button in the topbar, between Manage and Login/out (AccountMenu.svelte) — the inline hero note is gone now that every page carries the same link. Also, on the CLI downloads page (ATFS-vsa5, previous commit): - Removed the dev-only preview banner/fixture entirely. - Fixed rankPlatforms so an OS match with no detected arch and more than one candidate (e.g. macOS with arch undetected) is never double-badged "recommended" — it's now a three-tier match (exact/os/none) with a softer "Matches your OS" tag for the os-only case. - Added a WebGL-renderer-based Apple Silicon vs Intel heuristic (detectMacArchFromWebGL/parseGpuRendererArch) for Safari/Firefox, which have no userAgentData API to ask at all; Chromium's own architecture hint is trusted as-is where available. Filed ATFS-e3fz (sign & notarize the macOS binaries) as a separate, not-yet-actionable follow-up pending Apple Developer credentials.