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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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3
frontend/packages/dashboard/src/flow.js
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@ -16,11 +16,12 @@ import {
$, el,
NOTIF,
appendLinkified,
openStream,
openStream, initServerWarnings,
} from './common.js';
(() => {
NOTIF.bind();
initServerWarnings();
// ─── local containers cache (for compose autocomplete) ──────────────────
// The compose box's @-mention completion suggests known agent names.