refactor(frontend): finish design-system migration — chatbot, a11y, lint

- Rewrite chatbot container + panel to new surface/signal/ink tokens
  (was still on dead glass/text-primary tokens -> wrong colors)
- loading-skeleton: glass -> surface-2
- Fix a11y: SVG charts role=img+aria-label, audio aria-label,
  message-entry as real <button>, tooltip biome-ignore (intentional)
- Type messages/page initialPage (noImplicitAny)
- tsc clean, next build green, biome 0 errors

services/frontend/src/app/(dashboard)/messages/page.tsx

@@ -2,7 +2,7 @@
  * Messages — Server Component.
  * Reads URL guild/channel/selected/tab on the server; seeds first page SSR.
  */
-import { getMessages } from "@/lib/api/server";
+import { getMessages, type MessagePageResult } from "@/lib/api/server";
 import MessagesView from "./view";
 
 export default async function MessagesPage({
@@ -19,7 +19,7 @@ export default async function MessagesPage({
       ? (sp.tab as "all" | "images" | "review")
       : "all";
 
-  let initialPage;
+  let initialPage: MessagePageResult | undefined;
   if (guild) {
     initialPage = await getMessages(guild, channel || undefined).catch(
       () => undefined,

services/frontend/src/app/(dashboard)/recordings/view.tsx

@@ -149,7 +149,13 @@ function PreviewDialog({
         <div className="display text-lg text-[var(--color-signal)]">
           {recording.filename}
         </div>
-        <audio controls src={recording.download_url ?? ""} className="w-full" />
+        {/* biome-ignore lint/a11y/useMediaCaption: voice recordings are uncaptioned audio previews — no transcript available */}
+        <audio
+          controls
+          src={recording.download_url ?? ""}
+          aria-label={`Audio recording: ${recording.filename}`}
+          className="w-full"
+        />
         <div className="mono text-xs text-[var(--color-ink-soft)]">
           {(recording.size_bytes / 1024).toFixed(0)} KB ·{" "}
           {recording.upload_status}

services/frontend/src/components/charts/radial-gauge.tsx

@@ -43,6 +43,8 @@ export function RadialGauge({
         height={size}
         viewBox={`0 0 ${size} ${size}`}
         className="-rotate-90"
+        role="img"
+        aria-label={`${Math.round(pct * 100)}% ${label ?? "gauge"}`}
       >
         <circle
           cx={size / 2}

services/frontend/src/components/charts/sparkline.tsx

@@ -21,7 +21,15 @@ export function Sparkline({
 }: SparklineProps) {
   const id = useId().replace(/:/g, "");
   if (data.length < 2)
-    return <svg width={width} height={height} className={className} />;
+    return (
+      <svg
+        width={width}
+        height={height}
+        className={className}
+        role="img"
+        aria-label="No data"
+      />
+    );
 
   const min = Math.min(...data);
   const max = Math.max(...data);
@@ -46,6 +54,8 @@ export function Sparkline({
       viewBox={`0 0 ${width} ${height}`}
       className={className}
       preserveAspectRatio="none"
+      role="img"
+      aria-label="Trend sparkline"
     >
       <defs>
         <linearGradient id={`spark-${id}`} x1="0" y1="0" x2="0" y2="1">

services/frontend/src/components/chatbot/chat-panel.tsx

@@ -52,15 +52,15 @@ export function ChatPanel({ inputRef: externalInputRef }: ChatPanelProps) {
   };
 
   return (
-    <div className="flex flex-col h-full">
+    <div className="flex h-full flex-col">
       {/* Chat messages */}
       <div
         ref={listRef}
-        className="flex-1 overflow-y-auto px-2 py-2 space-y-1.5"
+        className="flex-1 space-y-1.5 overflow-y-auto px-2 py-2"
       >
         {messages.length === 0 ? (
-          <div className="flex flex-col justify-center h-full gap-3 px-3 text-center">
+          <div className="flex h-full flex-col justify-center gap-3 px-3 text-center">
-            <p className="text-[11px] text-text-secondary/50">
+            <p className="text-[11px] text-[var(--color-ink-soft)]">
               Halo! 👋 Aku tau soal server ini — pesan, flag, dan aktivitas.
             </p>
             <div className="flex flex-wrap justify-center gap-1.5">
@@ -70,9 +70,9 @@ export function ChatPanel({ inputRef: externalInputRef }: ChatPanelProps) {
                   type="button"
                   onClick={() => handleSuggestion(s)}
                   disabled={isTyping}
-                  className="flex items-center gap-1 rounded-full border border-glass-border px-2.5 py-1 text-[10px] text-text-secondary/70 transition-colors hover:bg-glass-bg hover:text-text-primary disabled:opacity-40"
+                  className="flex items-center gap-1 rounded-full border border-[var(--color-hairline)] bg-[var(--color-surface-2)] px-2.5 py-1 text-[10px] text-[var(--color-ink-soft)] transition-colors hover:bg-[var(--color-signal)] hover:text-[var(--color-signal-ink)] disabled:opacity-40"
                 >
-                  <Sparkles className="size-2.5 text-primary/60" />
+                  <Sparkles className="size-2.5 text-[var(--color-signal)]" />
                   {s}
                 </button>
               ))}
@@ -85,15 +85,15 @@ export function ChatPanel({ inputRef: externalInputRef }: ChatPanelProps) {
               className={`flex flex-col ${msg.role === "user" ? "items-end" : "items-start"}`}
             >
               <div
-                className={`text-[11px] px-2.5 py-1.5 rounded-xl max-w-[85%] leading-relaxed whitespace-pre-wrap break-words ${
+                className={`max-w-[85%] break-words whitespace-pre-wrap rounded-xl px-2.5 py-1.5 text-[11px] leading-relaxed ${
                   msg.role === "user"
-                    ? "bg-primary/20 text-text-primary rounded-br-sm"
+                    ? "rounded-br-sm bg-[var(--color-signal)] text-[var(--color-signal-ink)]"
-                    : "glass text-text-secondary rounded-bl-sm"
+                    : "rounded-bl-sm bg-[var(--color-surface-2)] text-[var(--color-ink)]"
                 }`}
               >
                 {msg.content}
               </div>
-              <span className="mt-0.5 px-1 text-[9px] text-text-secondary/30">
+              <span className="mt-0.5 px-1 text-[9px] text-[var(--color-ink-soft)]">
                 {formatTime(msg.timestamp)}
               </span>
             </div>
@@ -101,18 +101,18 @@ export function ChatPanel({ inputRef: externalInputRef }: ChatPanelProps) {
         )}
         {isTyping && (
           <div className="flex justify-start">
-            <div className="glass rounded-xl rounded-bl-sm px-2.5 py-2">
+            <div className="rounded-xl rounded-bl-sm bg-[var(--color-surface-2)] px-2.5 py-2">
               <span className="inline-flex gap-1">
                 <span
-                  className="size-1.5 rounded-full bg-text-secondary animate-bounce"
+                  className="size-1.5 animate-bounce rounded-full bg-[var(--color-ink-soft)]"
                   style={{ animationDelay: "0ms" }}
                 />
                 <span
-                  className="size-1.5 rounded-full bg-text-secondary animate-bounce"
+                  className="size-1.5 animate-bounce rounded-full bg-[var(--color-ink-soft)]"
                   style={{ animationDelay: "150ms" }}
                 />
                 <span
-                  className="size-1.5 rounded-full bg-text-secondary animate-bounce"
+                  className="size-1.5 animate-bounce rounded-full bg-[var(--color-ink-soft)]"
                   style={{ animationDelay: "300ms" }}
                 />
               </span>
@@ -124,13 +124,13 @@ export function ChatPanel({ inputRef: externalInputRef }: ChatPanelProps) {
       {/* Input bar */}
       <form
         onSubmit={handleSubmit}
-        className="flex items-center gap-1.5 px-2 py-2 border-t border-glass-border shrink-0"
+        className="flex shrink-0 items-center gap-1.5 border-t border-[var(--color-hairline)] px-2 py-2"
       >
         <input
           ref={inputRef}
           type="text"
           placeholder="Tanya soal server, pesan, atau statistik…"
-          className="flex-1 bg-transparent text-[11px] text-text-primary placeholder-text-secondary/30 outline-none"
+          className="flex-1 bg-transparent text-[11px] text-[var(--color-ink)] outline-none placeholder:text-[var(--color-ink-soft)]/50"
           disabled={isTyping}
           autoComplete="off"
         />
@@ -138,22 +138,22 @@ export function ChatPanel({ inputRef: externalInputRef }: ChatPanelProps) {
           <button
             type="button"
             onClick={() => void clearMessages()}
-            className="size-6 flex items-center justify-center rounded hover:bg-glass-bg transition-colors disabled:opacity-40"
+            className="flex size-6 items-center justify-center rounded transition-colors hover:bg-[var(--color-surface-2)] disabled:opacity-40"
             disabled={isTyping}
             aria-label="Hapus riwayat chat"
             title="Hapus riwayat"
           >
-            <Eraser className="size-3 text-text-secondary/50 hover:text-destructive" />
+            <Eraser className="size-3 text-[var(--color-ink-soft)] hover:text-[var(--color-vermilion)]" />
           </button>
         )}
         <button
           type="submit"
-          className="size-7 flex items-center justify-center rounded-lg bg-primary/15 hover:bg-primary/25 transition-colors disabled:opacity-40"
+          className="flex size-7 items-center justify-center rounded-lg bg-[var(--color-signal)] text-[var(--color-signal-ink)] transition-colors hover:opacity-90 disabled:opacity-40"
           disabled={isTyping}
           aria-label="Kirim pesan"
           title="Kirim"
         >
-          <Send className="size-3.5 text-primary" />
+          <Send className="size-3.5" />
         </button>
       </form>
     </div>

services/frontend/src/components/chatbot/chatbot-container.tsx

@@ -47,50 +47,49 @@ export function ChatbotContainer() {
       onMouseUp={handleMouseUp}
       onMouseLeave={handleMouseUp}
     >
-      {/* Main chatbot bubble — minimized FAB opens the full chat directly */}
       <div
-        className={`glass-intense rounded-2xl overflow-hidden transition-all duration-200 ${
+        className={`surface-2 overflow-hidden shadow-2xl transition-all duration-200 ${
-          minimized ? "w-14 h-14 cursor-pointer" : "w-[320px] h-[460px]"
+          minimized ? "h-14 w-14 cursor-pointer" : "h-[460px] w-[320px]"
         }`}
       >
         {minimized ? (
           <button
             type="button"
             onClick={() => setMinimized(false)}
-            className="w-full h-full flex items-center justify-center"
+            className="flex size-full items-center justify-center"
             onMouseDown={handleMouseDown}
             aria-label="Buka chatbot"
             title="Buka chatbot"
           >
-            <Bot className="size-6 text-primary" />
+            <Bot className="size-6 text-[var(--color-signal)]" />
           </button>
         ) : (
-          <div className="flex flex-col h-full">
+          <div className="flex h-full flex-col">
             {/* Drag handle + controls */}
             {/* biome-ignore lint/a11y/noStaticElementInteractions: drag handle — mouse-only gesture, keyboard users use the buttons in this header */}
             <div
-              className="flex items-center justify-between px-3 py-2 border-b border-glass-border cursor-grab active:cursor-grabbing shrink-0"
+              className="flex shrink-0 cursor-grab items-center justify-between border-b border-[var(--color-hairline)] px-3 py-2 active:cursor-grabbing"
               onMouseDown={handleMouseDown}
             >
-              <span className="flex items-center gap-1.5 text-[10px] font-semibold text-text-secondary tracking-wide uppercase">
+              <span className="flex items-center gap-1.5 text-[10px] font-semibold uppercase tracking-wide text-[var(--color-ink-soft)]">
-                <Bot className="size-3.5 text-primary" />
+                <Bot className="size-3.5 text-[var(--color-signal)]" />
                 Chatbot
               </span>
               <div className="flex items-center gap-0.5">
                 <button
                   type="button"
                   onClick={() => setMinimized(true)}
-                  className="size-6 flex items-center justify-center rounded hover:bg-glass-bg transition-colors"
+                  className="flex size-6 items-center justify-center rounded transition-colors hover:bg-[var(--color-surface-2)]"
                   aria-label="Kecilkan chatbot"
                   title="Kecilkan chatbot"
                 >
-                  <Minimize2 className="size-3.5 text-text-secondary/60 hover:text-text-primary" />
+                  <Minimize2 className="size-3.5 text-[var(--color-ink-soft)] hover:text-[var(--color-ink)]" />
                 </button>
               </div>
             </div>
 
             {/* Chat panel — always open when bubble is expanded */}
-            <div className="flex-1 min-h-0">
+            <div className="min-h-0 flex-1">
               <ChatPanel inputRef={inputRef} />
             </div>
           </div>

services/frontend/src/components/messages/message-entry.tsx

@@ -39,11 +39,12 @@ export function MessageEntry({
   const status = msg.ai_status ?? null;
 
   return (
-    <div
+    <button
+      type="button"
       data-selected={selected}
       onClick={onSelect}
       className={cn(
-        "group relative mb-1.5 flex items-start gap-2.5 rounded-[var(--radius-r)] p-2.5 cursor-pointer",
+        "group relative mb-1.5 flex w-full items-start gap-2.5 rounded-[var(--radius-r)] p-2.5 text-left cursor-pointer",
         "transition-all hover:bg-[var(--color-surface-2)]",
         selected && "bg-[var(--color-signal)]/6",
       )}
@@ -81,6 +82,6 @@ export function MessageEntry({
           )}
         </div>
       </div>
-    </div>
+    </button>
   );
 }

services/frontend/src/components/primitives/tooltip.tsx

@@ -25,6 +25,7 @@ export function Tooltip({
 }: TooltipProps) {
   const [show, setShow] = useState(false);
   return (
+    // biome-ignore lint/a11y/noStaticElementInteractions: tooltip wrapper — reveals on hover AND focus (keyboard-accessible via focus handlers above)
     <span
       className="relative inline-flex"
       onMouseEnter={() => setShow(true)}

services/frontend/src/components/shared/loading-skeleton.tsx

@@ -21,7 +21,7 @@ export function LoadingSkeleton({
     <div
       key={i}
       className={cn(
-        "glass rounded-[var(--radius-card)] overflow-hidden",
+        "surface-2 overflow-hidden",
         height,
         width,
         className,

services/frontend/src/components/three/static-fallback.tsx

@@ -33,6 +33,7 @@ export function StaticFallback({
         aria-hidden
         preserveAspectRatio="xMidYMid slice"
       >
+        <title>Speaker orbs</title>
         <rect width="200" height="200" fill="oklch(0.18 0.02 70)" />
         {orbs.map((o, i) => (
           <g
@@ -71,6 +72,7 @@ export function StaticFallback({
       aria-hidden
       preserveAspectRatio="xMidYMid slice"
     >
+      <title>Signal dots</title>
       <rect width="200" height="200" fill="oklch(0.18 0.02 70)" />
       {dots.map((d, i) => (
         <circle