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>

server/src/tools/mod.rs

@@ -3,6 +3,7 @@
 
 pub mod agent;
 pub mod bash;
+pub mod browser;
 pub mod craft;
 pub mod cad;
 pub mod fs;
@@ -161,6 +162,7 @@ pub fn builtin_tools() -> Vec<Arc<dyn Tool>> {
         Arc::new(crate::shells::BashOutput),
         Arc::new(crate::shells::KillShell),
         Arc::new(web::WebFetch),
+        Arc::new(browser::Browser),
         Arc::new(web::WebSearch),
         Arc::new(agent::CraftPhase),
         Arc::new(agent::ChangeDirectory),