feat: agent concurrency, conversation summaries, AI tools config, UI polish

- Agent slot limiter for concurrent tool execution
- Conversation summarization with soft-delete (MarkSummarized)
- ANSI stripping in terminal tool output
- Configurable crush-run timeout (default 600s, max 900s)
- Starship theme refactor, AI tools config grid, system update UI
- Streaming segments refactor, summarized messages block in feed
- CSS: headings, scrollbars, tool cards, summary block styles
- i18n additions (en+fr) for tools, updates, config

💘 Generated with Crush

Assisted-by: GLM-5.1 via Crush <crush@charm.land>

web/src/components/App.jsx

@@ -16,8 +16,6 @@ export default function App() {
   const [isSudo, setIsSudo] = useState(false)
   const [dashRefreshKey, setDashRefreshKey] = useState(0)
   const dashRefreshRef = useRef(null)
-  const [updates, setUpdates] = useState([])
-  const [tools, setTools] = useState([])
   const [config, setConfig] = useState(null)
   const [showOnboarding, setShowOnboarding] = useState(false)
   const { t, layout } = useI18n()
@@ -31,8 +29,6 @@ export default function App() {
 
   useEffect(() => {
     api.getInfo().then(d => { setInfo(d); setIsSudo(!!d.sudo) }).catch(() => {})
-    api.getTools().then(d => setTools(d.tools || [])).catch(() => {})
-    api.getUpdates().then(d => setUpdates(d.updates || [])).catch(() => {})
     api.getConfig().then(d => {
       setConfig(d)
       const theme = d.profile?.preferences?.theme || 'cyberpunk-red'
@@ -82,9 +78,6 @@ export default function App() {
     return () => window.removeEventListener('navigate-to-shell', handler)
   }, [])
 
-  const hasUpdates = updates.some(u => u.needsUpdate)
-  const installed = tools.filter(tool => tool.installed).length
-
   const WINDOW_SHORTCUTS = useMemo(() => ({
     dash: [],
     studio: [
@@ -127,17 +120,6 @@ export default function App() {
 
         <div className="header-spacer" />
 
-        <div className="header-indicators">
-          <span
-            className={`indicator ${installed > 0 ? 'ok' : 'off'}`}
-            title={t('header.toolsInstalled', { count: installed })}
-          />
-          <span
-            className={`indicator ${hasUpdates ? 'warn' : 'ok'}`}
-            title={hasUpdates ? t('header.updatesAvailable') : t('header.upToDate')}
-          />
-        </div>
-
         <span className="header-clock">
           {clock.toLocaleTimeString(layout.locale, { hour: '2-digit', minute: '2-digit' })}
         </span>