Add backups with S3, daily cost push, automation templates and a browser tool

- Daily backups (database + config) into <data_dir>/backups, keep N,
  optional upload to any S3-compatible bucket (SigV4, bucket pruning);
  settings panel with run-now, list and download
- Daily cost summary push at 20:00 (opt-in per user, preview button)
- Automations from templates (dependency check, security review, test
  health, daily summary, TODO report, docs freshness) via POST /jobs/create
- browser tool: headless Chromium over CDP – click, type, keys, waits,
  JavaScript, navigation, screenshots, console errors; requests to private
  network addresses are blocked (sub-resources and redirects included)
- Secrets masked in the config view: S3 secret key, metrics token
- Replace the remaining text arrows/refresh glyphs with SVG icons

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

web/src/components/Palette.tsx

@@ -137,9 +137,9 @@ export function Palette() {
           ))}
         </div>
         <div className="palette-foot">
-          <span><kbd>↑</kbd><kbd>↓</kbd> {t("palette.move")}</span>
+          <span><kbd><Icon name="arrow-up" className="tiny" /></kbd><kbd><Icon name="arrow-down" className="tiny" /></kbd> {t("palette.move")}</span>
           <span><kbd>Enter</kbd> {t("palette.open")}</span>
-          <span><kbd>Alt+↑</kbd><kbd>Alt+↓</kbd> {t("palette.prevNext")}</span>
+          <span><kbd>Alt+<Icon name="arrow-up" className="tiny" /></kbd><kbd>Alt+<Icon name="arrow-down" className="tiny" /></kbd> {t("palette.prevNext")}</span>
           <span><kbd>Esc</kbd> {t("palette.close")}</span>
         </div>
       </div>