homepage: icon swaps, clickable tiles, down pulse, header nav, compaction callout

- Icons: Copyparty -> improvised amber folder, Marreta -> crumbling
  wall (bricks + red crack), Calibre-Web -> book, OpenWebUI -> official
  logo.png from openwebui.com, Seerr -> official seerr.dev
  os_logo_filled.svg.
- Tiles with an open link are clickable whole (.panel.clickable: hover
  lift + glow; inner link clicks pass through).
- Any DOWN panel (app tile or model card) gets a red gradient wash and a
  slow pulsing glow (.panel.down, .mi-card:has(.badge.down)).
- docs / admin / account-settings buttons moved from the footer to the
  header (nav.top-links); footer keeps the deployment stamp.
- Zealot compaction advice promoted from the Use paragraph to a bordered
  glowing model.compaction callout (.mi-comp); component seam pinned to
  the new field.

shared/homepage/img/apps/mono-cp.svg

@@ -1 +1 @@
-<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 96 96"><polygon points="48,6 86,27 86,69 48,90 10,69 10,27" fill="#1c1300" stroke="#ffb000" stroke-width="3"/><text x="48" y="60" font-family="monospace" font-size="30" font-weight="bold" fill="#ffb000" text-anchor="middle">CP</text></svg>
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 96 96"><polygon points="48,6 86,27 86,69 48,90 10,69 10,27" fill="#1c1300" stroke="#ffb000" stroke-width="3"/><path d="M26 36 h16 l5 6 h23 v26 H26 z" fill="none" stroke="#ffb000" stroke-width="4" stroke-linejoin="round"/></svg>