feat: add auto-refresh toggle to TopBar and GlobalFilterProvider

Add autoRefresh/setAutoRefresh to GlobalFilterContext, persisted in
localStorage. TopBar shows a LIVE/PAUSED toggle button with pulsing
dot indicator. Consumers can use useGlobalFilters().autoRefresh to
conditionally enable/disable polling intervals.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/design-system/layout/TopBar/TopBar.module.css

@@ -81,6 +81,56 @@
   flex-shrink: 0;
 }
 
+.liveToggle {
+  display: flex;
+  align-items: center;
+  gap: 6px;
+  padding: 4px 10px;
+  border: 1px solid var(--border);
+  border-radius: var(--radius-sm);
+  background: var(--bg-raised);
+  color: var(--text-muted);
+  font-family: var(--font-mono);
+  font-size: 10px;
+  font-weight: 600;
+  letter-spacing: 0.5px;
+  cursor: pointer;
+  transition: color 0.15s, border-color 0.15s, background 0.15s;
+  height: 30px;
+}
+
+.liveToggle:hover {
+  border-color: var(--text-faint);
+}
+
+.liveToggleActive {
+  color: var(--success);
+  border-color: var(--success-border);
+  background: var(--success-bg);
+}
+
+.liveToggleActive:hover {
+  border-color: var(--success);
+}
+
+.liveDot {
+  width: 6px;
+  height: 6px;
+  border-radius: 50%;
+  background: var(--text-muted);
+  flex-shrink: 0;
+}
+
+.liveToggleActive .liveDot {
+  background: var(--success);
+  animation: livePulse 2s ease-in-out infinite;
+}
+
+@keyframes livePulse {
+  0%, 100% { opacity: 1; }
+  50% { opacity: 0.4; }
+}
+
 .themeToggle {
   background: none;
   border: 1px solid var(--border);

src/design-system/layout/TopBar/TopBar.tsx

@@ -84,8 +84,18 @@ export function TopBar({
         onChange={globalFilters.setTimeRange}
       />
 
-      {/* Right: theme toggle, env badge, user */}
+      {/* Right: auto-refresh toggle, theme toggle, env badge, user */}
       <div className={styles.right}>
+        <button
+          className={`${styles.liveToggle} ${globalFilters.autoRefresh ? styles.liveToggleActive : ''}`}
+          onClick={() => globalFilters.setAutoRefresh(!globalFilters.autoRefresh)}
+          type="button"
+          aria-label={globalFilters.autoRefresh ? 'Disable auto-refresh' : 'Enable auto-refresh'}
+          title={globalFilters.autoRefresh ? 'Auto-refresh is on — click to pause' : 'Auto-refresh is paused — click to resume'}
+        >
+          <span className={styles.liveDot} />
+          {globalFilters.autoRefresh ? 'LIVE' : 'PAUSED'}
+        </button>
         <button
           className={styles.themeToggle}
           onClick={toggleTheme}

src/design-system/providers/GlobalFilterProvider.tsx

@@ -16,6 +16,8 @@ interface GlobalFilterContextValue {
   toggleStatus: (status: ExchangeStatus) => void
   clearStatusFilters: () => void
   isInTimeRange: (timestamp: Date) => boolean
+  autoRefresh: boolean
+  setAutoRefresh: (enabled: boolean) => void
 }
 
 const GlobalFilterContext = createContext<GlobalFilterContextValue | null>(null)
@@ -27,9 +29,17 @@ function getDefaultTimeRange(): TimeRange {
   return { start, end, preset: DEFAULT_PRESET }
 }
 
+function getInitialAutoRefresh(): boolean {
+  try {
+    const stored = localStorage.getItem('cameleer:auto-refresh')
+    return stored === null ? true : stored === 'true'
+  } catch { return true }
+}
+
 export function GlobalFilterProvider({ children }: { children: ReactNode }) {
   const [timeRange, setTimeRangeState] = useState<TimeRange>(getDefaultTimeRange)
   const [statusFilters, setStatusFilters] = useState<Set<ExchangeStatus>>(new Set())
+  const [autoRefresh, setAutoRefreshState] = useState<boolean>(getInitialAutoRefresh)
 
   const setTimeRange = useCallback((range: TimeRange) => {
     setTimeRangeState(range)
@@ -51,6 +61,11 @@ export function GlobalFilterProvider({ children }: { children: ReactNode }) {
     setStatusFilters(new Set())
   }, [])
 
+  const setAutoRefresh = useCallback((enabled: boolean) => {
+    setAutoRefreshState(enabled)
+    try { localStorage.setItem('cameleer:auto-refresh', String(enabled)) } catch {}
+  }, [])
+
   const isInTimeRange = useCallback(
     (timestamp: Date) => {
       if (timeRange.preset) {
@@ -65,7 +80,7 @@ export function GlobalFilterProvider({ children }: { children: ReactNode }) {
 
   return (
     <GlobalFilterContext.Provider
-      value={{ timeRange, setTimeRange, statusFilters, toggleStatus, clearStatusFilters, isInTimeRange }}
+      value={{ timeRange, setTimeRange, statusFilters, toggleStatus, clearStatusFilters, isInTimeRange, autoRefresh, setAutoRefresh }}
     >
       {children}
     </GlobalFilterContext.Provider>