refactor: remove Review tab, make UI state client-side, fix Jakarta time in analytics

- Remove Review tab completely (was redundant with Messages flagged view)
- UI state now client-side only (localStorage) — no server API calls for tab/channel/guild selection
- Fixes dashboard crash when server is down — now loads fully client-side
- Live panel still uses server API for voice/media operations (only what needs it)
- Analytics hourly chart labels now show Jakarta time (WIB/UTC+7) instead of UTC
- Analytics formatTimeAgo uses Jakarta time reference
- Reduced tabs to 3: Live, Messages, Analytics
- Removed unused uiState API imports and server-side state fetching

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

frontend/src/App.tsx

@@ -2,7 +2,6 @@ import { useCallback, useEffect, useMemo, useRef, useState } from "react";
 import { DashboardLayout } from "./components/layout/DashboardLayout";
 import { LivePanel } from "./components/live/LivePanel";
 import { MessagesPanel } from "./components/messages/MessagesPanel";
-import { ReviewPanel } from "./components/review/ReviewPanel";
 import { Tabs, TabsContent } from "./components/ui/tabs";
 import { AnalyticsPanel } from "./components/analytics/AnalyticsPanel";
 import { AuthOverlay } from "./components/layout/AuthOverlay";
@@ -122,8 +121,8 @@ export default function App() {
   }, [socket.socketRef]);
 
   const toggleStreaming = useCallback(async () => {
-    if (isStreaming) { stopStreamingLocal(); await patchUIState({ isStreaming: false }); }
-    else { await startStreamingLocal(); await patchUIState({ isStreaming: true }); }
+    if (isStreaming) { stopStreamingLocal(); patchUIState({ isStreaming: false }); }
+    else { await startStreamingLocal(); patchUIState({ isStreaming: true }); }
   }, [isStreaming, startStreamingLocal, stopStreamingLocal, patchUIState]);
 
   useEffect(() => { if (selectedVoiceGuild) voice.loadVoiceChannels(selectedVoiceGuild).catch(() => undefined); }, [selectedVoiceGuild]);
@@ -131,15 +130,15 @@ export default function App() {
   useEffect(() => { if (selectedTextChannel) messages.fetchMessages(selectedTextChannel).catch(() => undefined); }, [selectedTextChannel]);
 
   const toggleListening = useCallback(async () => {
-    if (isListening) { await audioContextListenRef.current?.suspend(); userTimelinesRef.current.clear(); setIsListening(false); await patchUIState({ isListening: false }); return; }
+    if (isListening) { await audioContextListenRef.current?.suspend(); userTimelinesRef.current.clear(); setIsListening(false); patchUIState({ isListening: false }); return; }
     const AudioContextCtor = window.AudioContext || window.webkitAudioContext;
     audioContextListenRef.current ??= new AudioContextCtor({ sampleRate: SAMPLE_RATE });
     await audioContextListenRef.current.resume();
     setIsListening(true);
-    await patchUIState({ isListening: true });
+    patchUIState({ isListening: true });
   }, [isListening, patchUIState]);
 
-  const tabs = useMemo(() => ["live", "messages", "analytics", "review"] as DashboardTab[], []);
+  const tabs = useMemo(() => ["live", "messages", "analytics"] as DashboardTab[], []);
 
   return (
     <DashboardLayout
@@ -213,9 +212,6 @@ export default function App() {
             onChannelChange={(channelId) => patchUIState({ selectedTextChannel: channelId })}
           />
         </TabsContent>
-        <TabsContent value="review">
-          <ReviewPanel messages={messages.messages} onReanalyze={messages.reanalyze} />
-        </TabsContent>
       </Tabs>
     </DashboardLayout>
   );

frontend/src/components/analytics/AnalyticsPanel.tsx

@@ -499,7 +499,12 @@ function HourlyChart({ hourly, loading }: { hourly: HourlyBucket[] | undefined;
   }
 
   const maxCount = Math.max(...hourly.map((b) => b.count), 1);
-  const labels = hourly.map((b) => b.hour.slice(11, 16));
+  // Convert UTC hour buckets to Jakarta time (UTC+7)
+  const labels = hourly.map((b) => {
+    const utcHour = parseInt(b.hour.slice(11, 13), 10);
+    const jakartaHour = (utcHour + 7) % 24;
+    return `${String(jakartaHour).padStart(2, "0")}:00`;
+  });
 
   return (
     <div ref={containerRef} className="space-y-3">
@@ -553,7 +558,7 @@ function HourlyChart({ hourly, loading }: { hourly: HourlyBucket[] | undefined;
               </div>
               {/* Hover tooltip */}
               <div className="absolute -top-10 left-1/2 z-20 -translate-x-1/2 whitespace-nowrap rounded-lg bg-popover px-2.5 py-1.5 text-xs font-medium text-popover-foreground opacity-0 shadow-lg transition-opacity group-hover:opacity-100 pointer-events-none">
-                {bucket.hour.slice(11, 16)} — {bucket.count} msgs
+                {labels[hourly.indexOf(bucket)]} — {bucket.count} msgs
               </div>
             </motion.div>
           );
@@ -987,7 +992,9 @@ function pct(part: number, total: number): number {
 }
 
 function formatTimeAgo(ts: number): string {
-  const diff = Date.now() - ts;
+  // Use Jakarta time as reference for "ago" calculations
+  const jakartaNow = new Date(new Date().toLocaleString("en-US", { timeZone: "Asia/Jakarta" }));
+  const diff = jakartaNow.getTime() - ts;
   const minutes = Math.floor(diff / 60000);
   if (minutes < 1) return "baru saja";
   if (minutes < 60) return `${minutes}m lalu`;

frontend/src/components/layout/Header.tsx

@@ -8,14 +8,12 @@ const titles: Record<DashboardTab, string> = {
   live: "Voice, Media & Recordings",
   messages: "Messages & Moderation",
   analytics: "Analytics & Insights",
-  review: "Moderation Review",
 };
 
 const subtitles: Record<DashboardTab, string> = {
   live: "Join voice channels, play media, stream audio, and browse recordings.",
   messages: "Capture, analyse, and moderate Discord messages.",
   analytics: "Server moderation statistics and trends.",
-  review: "Review AI-flagged messages for moderation.",
 };
 
 interface HeaderProps {

frontend/src/components/layout/Sidebar.tsx

@@ -1,4 +1,4 @@
-import { Bot, BarChart3, MessageSquare, ShieldAlert, Radio } from "lucide-react";
+import { Bot, BarChart3, MessageSquare, Radio } from "lucide-react";
 import type { DashboardTab } from "../../types/ui";
 import { cn } from "../../lib/utils";
 import { Button } from "../ui/button";
@@ -7,7 +7,6 @@ const navItems: Array<{ id: DashboardTab; label: string; icon: typeof Radio }> =
   { id: "live", label: "Live", icon: Radio },
   { id: "messages", label: "Messages", icon: MessageSquare },
   { id: "analytics", label: "Analytics", icon: BarChart3 },
-  { id: "review", label: "Review", icon: ShieldAlert },
 ];
 
 interface SidebarProps {

frontend/src/hooks/useUIState.ts

@@ -1,35 +1,36 @@
-import { useCallback, useEffect, useState } from "react";
-import { getUIState, updateUIState } from "../api/uiState";
+import { useCallback, useState } from "react";
 import type { UIState } from "../types/ui";
 
-export function useUIState() {
-  const [uiState, setUIState] = useState<UIState>({ activeTab: "live" });
-  const [loading, setLoading] = useState(true);
-  const [error, setError] = useState<string | null>(null);
+const STORAGE_KEY = "bete-dashboard-ui-state";
 
-  useEffect(() => {
-    let cancelled = false;
-    getUIState()
-      .then((state) => {
-        if (!cancelled) setUIState({ activeTab: "live", ...state });
-      })
-      .catch((err) => {
-        if (!cancelled) setError(err instanceof Error ? err.message : String(err));
-      })
-      .finally(() => {
-        if (!cancelled) setLoading(false);
-      });
-    return () => {
-      cancelled = true;
-    };
-  }, []);
+function loadState(): UIState {
+  try {
+    const raw = localStorage.getItem(STORAGE_KEY);
+    if (raw) return JSON.parse(raw) as UIState;
+  } catch {
+    // ignore parse errors
+  }
+  return { activeTab: "live" };
+}
+
+function saveState(state: UIState): void {
+  try {
+    localStorage.setItem(STORAGE_KEY, JSON.stringify(state));
+  } catch {
+    // ignore quota errors
+  }
+}
+
+export function useUIState() {
+  const [uiState, setUIState] = useState<UIState>(loadState);
 
-  const patchUIState = useCallback(async (patch: Partial<UIState>) => {
-    setUIState((prev) => ({ ...prev, ...patch }));
-    const next = await updateUIState(patch);
-    setUIState((prev) => ({ ...prev, ...next }));
-    return next;
+  const patchUIState = useCallback((patch: Partial<UIState>) => {
+    setUIState((prev) => {
+      const next = { ...prev, ...patch };
+      saveState(next);
+      return next;
+    });
   }, []);
 
-  return { uiState, setUIState, patchUIState, loading, error };
+  return { uiState, setUIState, patchUIState, loading: false, error: null };
 }

frontend/src/types/ui.ts

@@ -1,4 +1,4 @@
-export type DashboardTab = "live" | "messages" | "review" | "analytics";
+export type DashboardTab = "live" | "messages" | "analytics";
 
 export interface UIState {
   selectedGuild?: string;