diff --git a/biome.json b/biome.json
index 6e6eee1..8671327 100644
--- a/biome.json
+++ b/biome.json
@@ -1,5 +1,5 @@
 {
-  "$schema": "https://biomejs.dev/schemas/2.5.5/schema.json",
+  "$schema": "https://biomejs.dev/schemas/2.2.0/schema.json",
   "vcs": {
     "enabled": true,
     "clientKind": "git",
@@ -30,7 +30,6 @@
   "linter": {
     "enabled": true,
     "rules": {
-      "preset": "recommended",
       "style": {
         "noNonNullAssertion": "warn",
         "useNodejsImportProtocol": "warn"
@@ -41,6 +40,7 @@
         "noArrayIndexKey": "warn"
       },
       "a11y": {
+        "useSemanticElements": "off",
         "useButtonType": "off",
         "noAutofocus": "off"
       },
diff --git a/services/frontend/src/app/(dashboard)/analysis/page.tsx b/services/frontend/src/app/(dashboard)/analysis/page.tsx
index 456438a..a28d231 100644
--- a/services/frontend/src/app/(dashboard)/analysis/page.tsx
+++ b/services/frontend/src/app/(dashboard)/analysis/page.tsx
@@ -111,10 +111,8 @@ export default function AnalysisPage() {
                               variant="outline"
                               className={cn(
                                 "text-[10px] px-1.5 py-0 h-4",
-                                msg.ai_status === "clean" &&
-                                  "text-green-500",
-                                msg.ai_status === "flagged" &&
-                                  "text-red-500",
+                                msg.ai_status === "clean" && "text-green-500",
+                                msg.ai_status === "flagged" && "text-red-500",
                               )}
                             >
                               {msg.ai_status}
@@ -127,17 +125,17 @@ export default function AnalysisPage() {
                         {msg.ai_moderation_flags &&
                           msg.ai_moderation_flags !== "[]" && (
                             <div className="flex flex-wrap gap-1">
-                              {safeParseJsonArray(
-                                msg.ai_moderation_flags,
-                              ).map((flag) => (
-                                <Badge
-                                  key={flag}
-                                  variant="destructive"
-                                  className="text-[10px] px-1.5 py-0 h-4"
-                                >
-                                  {flag}
-                                </Badge>
-                              ))}
+                              {safeParseJsonArray(msg.ai_moderation_flags).map(
+                                (flag) => (
+                                  <Badge
+                                    key={flag}
+                                    variant="destructive"
+                                    className="text-[10px] px-1.5 py-0 h-4"
+                                  >
+                                    {flag}
+                                  </Badge>
+                                ),
+                              )}
                             </div>
                           )}
 
diff --git a/services/frontend/src/app/(dashboard)/dashboard/page.tsx b/services/frontend/src/app/(dashboard)/dashboard/page.tsx
index d66d0c6..ea3b82b 100644
--- a/services/frontend/src/app/(dashboard)/dashboard/page.tsx
+++ b/services/frontend/src/app/(dashboard)/dashboard/page.tsx
@@ -15,7 +15,7 @@ import {
 } from "lucide-react";
 import Image from "next/image";
 import { useCallback, useEffect, useState } from "react";
-
+import { GuildSelector } from "@/components/shared/guild-selector";
 import { Badge } from "@/components/ui/badge";
 import { Button } from "@/components/ui/button";
 import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
@@ -23,7 +23,6 @@ import { Input } from "@/components/ui/input";
 import { Progress } from "@/components/ui/progress";
 import { Skeleton } from "@/components/ui/skeleton";
 import { Tabs, TabsList, TabsTrigger } from "@/components/ui/tabs";
-import { GuildSelector } from "@/components/shared/guild-selector";
 import { dashboardApi } from "@/lib/api";
 import { formatNumber } from "@/lib/format";
 import type {
@@ -189,11 +188,7 @@ function StatsView() {
               value={stats.total_messages}
               icon={Hash}
             />
-            <StatCard
-              label="Today"
-              value={stats.today_messages}
-              icon={Clock}
-            />
+            <StatCard label="Today" value={stats.today_messages} icon={Clock} />
             <StatCard label="Users" value={stats.total_users} icon={Users} />
             <StatCard
               label="Active 24h"
@@ -239,19 +234,15 @@ function StatsView() {
                   </p>
                 ) : (
                   <div className="space-y-2">
-                    {stats.top_channels.map((ch, i) => {
+                    {stats.top_channels.map((ch, _i) => {
                       const maxCount = stats.top_channels[0].message_count;
                       const pct =
-                        maxCount > 0
-                          ? (ch.message_count / maxCount) * 100
-                          : 0;
+                        maxCount > 0 ? (ch.message_count / maxCount) * 100 : 0;
                       return (
                         <div key={ch.channel_id} className="space-y-1">
                           <div className="flex items-center justify-between text-sm">
                             <span className="truncate font-medium">
-                              #
-                              {ch.channel_name ??
-                                ch.channel_id.slice(0, 8)}
+                              #{ch.channel_name ?? ch.channel_id.slice(0, 8)}
                             </span>
                             <span className="text-muted-foreground tabular-nums">
                               {formatNumber(ch.message_count)}
@@ -279,9 +270,7 @@ function StatsView() {
                     <div className="text-2xl font-bold tabular-nums">
                       {stats.moderation_overview.pending}
                     </div>
-                    <div className="text-xs text-muted-foreground">
-                      Pending
-                    </div>
+                    <div className="text-xs text-muted-foreground">Pending</div>
                   </div>
                   <div className="rounded-lg bg-yellow-500/10 p-3 text-center space-y-1.5">
                     <div className="text-2xl font-bold tabular-nums text-yellow-500">
diff --git a/services/frontend/src/app/(dashboard)/layout.tsx b/services/frontend/src/app/(dashboard)/layout.tsx
index 45ff48f..06eaf4e 100644
--- a/services/frontend/src/app/(dashboard)/layout.tsx
+++ b/services/frontend/src/app/(dashboard)/layout.tsx
@@ -5,8 +5,8 @@ import { Suspense } from "react";
 import { Header } from "@/components/layout/header";
 import { MobileTabBar } from "@/components/layout/mobile-tab-bar";
 import { Sidebar } from "@/components/layout/sidebar";
-import { SidebarInset, SidebarProvider } from "@/components/ui/sidebar";
 import { MascotChatbot } from "@/components/mascot/mascot-chatbot";
+import { SidebarInset, SidebarProvider } from "@/components/ui/sidebar";
 import { WsProvider } from "@/lib/ws/context";
 
 function LoadingFallback() {
diff --git a/services/frontend/src/app/(dashboard)/media/page.tsx b/services/frontend/src/app/(dashboard)/media/page.tsx
index d333efd..ac9b627 100644
--- a/services/frontend/src/app/(dashboard)/media/page.tsx
+++ b/services/frontend/src/app/(dashboard)/media/page.tsx
@@ -1,13 +1,6 @@
 "use client";
 
-import {
-  Disc3,
-  Music,
-  Play,
-  SkipForward,
-  Square,
-  Volume2,
-} from "lucide-react";
+import { Disc3, Music, Play, SkipForward, Square, Volume2 } from "lucide-react";
 import Image from "next/image";
 import { useCallback, useEffect, useState } from "react";
 
diff --git a/services/frontend/src/app/(dashboard)/messages/page.tsx b/services/frontend/src/app/(dashboard)/messages/page.tsx
index b242e8d..e51f99c 100644
--- a/services/frontend/src/app/(dashboard)/messages/page.tsx
+++ b/services/frontend/src/app/(dashboard)/messages/page.tsx
@@ -12,7 +12,7 @@ import {
 } from "lucide-react";
 import Image from "next/image";
 import { useCallback, useEffect, useState } from "react";
-
+import { GuildSelector } from "@/components/shared/guild-selector";
 import { Avatar, AvatarFallback, AvatarImage } from "@/components/ui/avatar";
 import { Badge } from "@/components/ui/badge";
 import { Button } from "@/components/ui/button";
@@ -35,7 +35,6 @@ import {
 } from "@/components/ui/select";
 import { Skeleton } from "@/components/ui/skeleton";
 import { Tabs, TabsList, TabsTrigger } from "@/components/ui/tabs";
-import { GuildSelector } from "@/components/shared/guild-selector";
 import { messagesApi, voiceApi } from "@/lib/api";
 import { formatBytes, safeParseJsonArray } from "@/lib/format";
 import type { AttachmentRecord, Channel, MessageRecord } from "@/lib/types";
@@ -244,9 +243,7 @@ export default function MessagesPage() {
         <GuildSelector value={guildId} onChange={setGuildId} />
         <div className="flex flex-col items-center justify-center py-20 text-center">
           <AlertCircle className="size-10 text-destructive mb-3" />
-          <p className="text-sm text-muted-foreground mb-4 max-w-sm">
-            {error}
-          </p>
+          <p className="text-sm text-muted-foreground mb-4 max-w-sm">{error}</p>
           <Button variant="outline" onClick={fetchMessages}>
             <RefreshCw className="size-4 mr-2" />
             Retry
@@ -490,9 +487,7 @@ export default function MessagesPage() {
                           {detailMessage.username}
                         </span>
                         <span className="text-xs text-muted-foreground">
-                          {new Date(
-                            detailMessage.created_at,
-                          ).toLocaleString()}
+                          {new Date(detailMessage.created_at).toLocaleString()}
                         </span>
                         {detailMessage.type === "deleted" && (
                           <Badge variant="destructive" className="text-[10px]">
@@ -787,18 +782,14 @@ function MessageCard({
               </p>
             )}
 
-            {msg.ai_confidence !== undefined &&
-              msg.ai_confidence !== null && (
-                <div className="flex items-center gap-2 max-w-40">
-                  <Progress
-                    value={msg.ai_confidence * 100}
-                    className="h-1.5"
-                  />
-                  <span className="text-[11px] text-muted-foreground tabular-nums shrink-0">
-                    {(msg.ai_confidence * 100).toFixed(0)}%
-                  </span>
-                </div>
-              )}
+            {msg.ai_confidence !== undefined && msg.ai_confidence !== null && (
+              <div className="flex items-center gap-2 max-w-40">
+                <Progress value={msg.ai_confidence * 100} className="h-1.5" />
+                <span className="text-[11px] text-muted-foreground tabular-nums shrink-0">
+                  {(msg.ai_confidence * 100).toFixed(0)}%
+                </span>
+              </div>
+            )}
 
             <div className="flex gap-1.5 pt-0.5">
               <Button
diff --git a/services/frontend/src/app/(dashboard)/recordings/page.tsx b/services/frontend/src/app/(dashboard)/recordings/page.tsx
index d9bd110..f07d126 100644
--- a/services/frontend/src/app/(dashboard)/recordings/page.tsx
+++ b/services/frontend/src/app/(dashboard)/recordings/page.tsx
@@ -91,9 +91,7 @@ export default function RecordingsPage() {
                       {rec.username}
                     </p>
                     <p className="text-xs text-muted-foreground">
-                      {rec.channel_name ??
-                        rec.channel_id ??
-                        "Unknown channel"}
+                      {rec.channel_name ?? rec.channel_id ?? "Unknown channel"}
                       {" — "}
                       {new Date(rec.created_at).toLocaleString()}
                     </p>
@@ -108,9 +106,7 @@ export default function RecordingsPage() {
                     <Button
                       variant="ghost"
                       size="icon"
-                      onClick={() =>
-                        window.open(rec.download_url!, "_blank")
-                      }
+                      onClick={() => window.open(rec.download_url, "_blank")}
                     >
                       <Download className="size-4" />
                     </Button>
diff --git a/services/frontend/src/app/(dashboard)/settings/page.tsx b/services/frontend/src/app/(dashboard)/settings/page.tsx
index 4e72139..fb98eef 100644
--- a/services/frontend/src/app/(dashboard)/settings/page.tsx
+++ b/services/frontend/src/app/(dashboard)/settings/page.tsx
@@ -1,12 +1,6 @@
 "use client";
 
-import {
-  Moon,
-  Server,
-  Shield,
-  Sun,
-  Wifi,
-} from "lucide-react";
+import { Moon, Server, Shield, Sun, Wifi } from "lucide-react";
 import { useEffect, useState } from "react";
 
 import { Badge } from "@/components/ui/badge";
@@ -85,9 +79,7 @@ export default function SettingsPage() {
               variant={statusConfig.variant}
               className="gap-1.5 px-2.5 py-1"
             >
-              <span
-                className={cn("size-1.5 rounded-full", statusConfig.dot)}
-              />
+              <span className={cn("size-1.5 rounded-full", statusConfig.dot)} />
               {statusConfig.label}
             </Badge>
           </div>
@@ -159,9 +151,7 @@ export default function SettingsPage() {
               <Separator />
               <ConfigRow
                 label="Auto-Delete Flagged"
-                value={
-                  config.autoDeleteFlaggedEnabled ? "Enabled" : "Disabled"
-                }
+                value={config.autoDeleteFlaggedEnabled ? "Enabled" : "Disabled"}
               />
             </div>
           ) : (
@@ -197,13 +187,7 @@ export default function SettingsPage() {
   );
 }
 
-function ConfigRow({
-  label,
-  value,
-}: {
-  label: string;
-  value: string;
-}) {
+function ConfigRow({ label, value }: { label: string; value: string }) {
   return (
     <div className="flex items-center justify-between py-1">
       <span className="text-muted-foreground">{label}</span>
diff --git a/services/frontend/src/app/(dashboard)/voice/page.tsx b/services/frontend/src/app/(dashboard)/voice/page.tsx
index 446d617..289ffa1 100644
--- a/services/frontend/src/app/(dashboard)/voice/page.tsx
+++ b/services/frontend/src/app/(dashboard)/voice/page.tsx
@@ -31,9 +31,7 @@ export default function VoicePage() {
 
   const [voiceStatus, setVoiceStatus] = useState<VoiceStatus | null>(null);
   const [speakers, setSpeakers] = useState<ActiveSpeaker[]>([]);
-  const [guilds, setGuilds] = useState<
-    Array<{ id: string; name: string }>
-  >([]);
+  const [guilds, setGuilds] = useState<Array<{ id: string; name: string }>>([]);
   const [voiceChannels, setVoiceChannels] = useState<
     Array<{ id: string; name: string }>
   >([]);
@@ -74,9 +72,7 @@ export default function VoicePage() {
     const unsubSpeaker = ws.on("voice_active_user", (user) => {
       const speaker = user as ActiveSpeaker;
       setSpeakers((prev) => {
-        const existing = prev.findIndex(
-          (s) => s.userId === speaker.userId,
-        );
+        const existing = prev.findIndex((s) => s.userId === speaker.userId);
         if (existing >= 0) {
           const next = [...prev];
           next[existing] = speaker;
@@ -224,9 +220,7 @@ export default function VoicePage() {
             ) : (
               <Button
                 onClick={handleConnect}
-                disabled={
-                  voiceLoading || !selectedGuild || !selectedChannel
-                }
+                disabled={voiceLoading || !selectedGuild || !selectedChannel}
               >
                 {voiceLoading ? (
                   <Loader2 className="size-4 animate-spin mr-1.5" />
@@ -286,9 +280,7 @@ export default function VoicePage() {
                   setMicActive(checked);
                   try {
                     await voiceApi.sendCommand(
-                      checked
-                        ? "voice:transmit:start"
-                        : "voice:transmit:stop",
+                      checked ? "voice:transmit:start" : "voice:transmit:stop",
                     );
                   } catch {
                     setMicActive(!checked);
diff --git a/services/frontend/src/components/shared/guild-selector.tsx b/services/frontend/src/components/shared/guild-selector.tsx
index 1f46882..6a1d456 100644
--- a/services/frontend/src/components/shared/guild-selector.tsx
+++ b/services/frontend/src/components/shared/guild-selector.tsx
@@ -45,9 +45,7 @@ export function GuildSelector({
       .getGuilds()
       .then(setGuilds)
       .catch((err) =>
-        setError(
-          err instanceof Error ? err.message : "Failed to load guilds",
-        ),
+        setError(err instanceof Error ? err.message : "Failed to load guilds"),
       )
       .finally(() => setLoading(false));
   }, []);
diff --git a/services/frontend/src/lib/format.ts b/services/frontend/src/lib/format.ts
index 18f1b68..1554f22 100644
--- a/services/frontend/src/lib/format.ts
+++ b/services/frontend/src/lib/format.ts
@@ -17,9 +17,7 @@ export function formatBytes(bytes: number): string {
 /**
  * Safely parse a JSON string into an array.
  */
-export function safeParseJsonArray(
-  value: string | null | undefined,
-): string[] {
+export function safeParseJsonArray(value: string | null | undefined): string[] {
   if (!value) return [];
   try {
     const parsed = JSON.parse(value);
diff --git a/services/frontend/src/lib/navigation.ts b/services/frontend/src/lib/navigation.ts
index a890a66..00e7d96 100644
--- a/services/frontend/src/lib/navigation.ts
+++ b/services/frontend/src/lib/navigation.ts
@@ -2,11 +2,11 @@ import {
   BarChart3,
   Headphones,
   LayoutDashboard,
+  type LucideIcon,
   MessageSquare,
   Mic,
   Music,
   Search,
-  type LucideIcon,
 } from "lucide-react";
 
 export interface NavItem {