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feat(dashboard): generic server-warnings banner on every page (#1518)

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Per operator request: instead of a disk-specific alert, surface a generic
server-warnings banner at the very top of every page, so new system
warnings can be added backend-side with no frontend change.

- hive-c0re `host_stats`: `server_warnings() -> Vec<ServerWarning>`
  (`{ kind, level, message }`). The threshold logic lives server-side; the
  host disk-pressure check (a `statvfs` probe of `/nix`: ≥85% used → warn,
  ≥95% → crit) is the first and only producer today. No new deps (libc).
- `/api/state` carries `server_warnings` (replaces the disk-specific
  field). Empty when all clear.
- frontend: `renderServerWarnings` / `initServerWarnings` in `common.js`
  inject a sticky top-of-<body> banner and render the list, coloured by
  `level`. Wired on every page — dashboard (live, via refreshState),
  FL0W, L0GS, H0M3. No per-warning frontend code; adding a warning kind
  is a pure backend change.

cargo check/clippy/fmt + npm run build green. Closes #1518.
This commit is contained in:
iris 2026-06-08 19:55:04 +02:00 • committed by mara
commit 5d0f3d060b
10 changed files with 241 additions and 6 deletions
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11
frontend/packages/dashboard/src/home.js
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@ -1,9 +1,12 @@
// H0M3 page script (#1464). The page is static markup; this only does
// two small things off a single `/api/state` read:
// a few small things off a single `/api/state` read:
// 1. reveal the Matrix tile when the matrix GUI is enabled (same
// gating as the dashboard's M4TR1X tab — no dead link otherwise);
// 2. fill the swarm/hive identity line when configured.
// No SSE, no shared deps — a portal doesn't need live updates.
// 2. fill the swarm/hive identity line when configured;
// 3. render the shared server-warnings banner (top of every page).
// No SSE — a portal doesn't need live updates.
import { renderServerWarnings } from './common.js';
const $ = (id) => document.getElementById(id);
@ -17,6 +20,8 @@ async function init() {
return; // best-effort: the tiles still work without it
}
renderServerWarnings(state.server_warnings);
if (state.matrix_gui_enabled) {
const tile = $('home-tile-matrix');
if (tile) tile.hidden = false;