fix: resolve bugs and improve frontend performance

- Fix register not resetting isLoading on success (causing login page to hang)
- Fix leaderboard streaks 400 error by forcing all_time timeframe
- Reorder routes so static paths match before dynamic practice/:sheetId
- Lazy-load QuestMap + Three.js (saves ~350KB gzip on initial load)
- Move KaTeX CSS to lazy import (only loads on math pages)
- Remove 28 duplicate Google Font @import lines from component CSS
- Add font preconnect + single stylesheet link in index.html
- Replace 8 unsafe JSON.parse(localStorage) calls with Zustand selectors
- Add global ErrorBoundary to prevent full-app crashes
- Extract arcTheme utilities to break static import cycle with QuestMap
- Merge Three.js + Troika into single chunk to fix circular dependency

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

index.html

@@ -4,6 +4,12 @@
     <meta charset="UTF-8" />
     <link rel="icon" type="image/svg+xml" href="/vite.svg" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <link rel="preconnect" href="https://fonts.googleapis.com" />
+    <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin />
+    <link
+      href="https://fonts.googleapis.com/css2?family=Cinzel:wght@700&family=Nunito:wght@400;700;800;900&family=Nunito+Sans:wght@400;600;700&family=Sorts+Mill+Goudy:ital@0;1&display=swap"
+      rel="stylesheet"
+    />
     <script src="https://www.geogebra.org/apps/deployggb.js"></script>
 
     <script

src/App.tsx

@@ -1,5 +1,4 @@
-import "katex/dist/katex.min.css";
+import { Suspense, lazy } from "react";
-
 import { Home } from "./pages/student/Home";
 import {
   createBrowserRouter,
@@ -19,10 +18,13 @@ import { StudentLayout } from "./pages/student/StudentLayout";
 import { TargetedPractice } from "./pages/student/targeted-practice/page";
 import { Drills } from "./pages/student/drills/page";
 import { HardTestModules } from "./pages/student/hard-test-modules/page";
-import { QuestMap } from "./pages/student/QuestMap";
 import { Register } from "./pages/auth/Register";
 import { PracticeSheetList } from "./pages/student/practice-sheet/page";
 
+const QuestMap = lazy(() =>
+  import("./pages/student/QuestMap").then((m) => ({ default: m.QuestMap })),
+);
+
 function App() {
   const router = createBrowserRouter([
     {
@@ -63,11 +65,11 @@ function App() {
             },
             {
               path: "quests",
-              element: <QuestMap />,
+              element: (
-            },
+                <Suspense fallback={<div style={{ minHeight: "100vh" }} />}>
-            {
+                  <QuestMap />
-              path: "practice/:sheetId",
+                </Suspense>
-              element: <Pretest />,
+              ),
             },
             {
               path: "practice/targeted-practice",
@@ -85,6 +87,10 @@ function App() {
               path: "practice/practice-sheet",
               element: <PracticeSheetList />,
             },
+            {
+              path: "practice/:sheetId",
+              element: <Pretest />,
+            },
           ],
         },
         {

src/components/ChestOpenModal.tsx

@@ -3,7 +3,6 @@ import type { QuestNode, ClaimedRewardResponse } from "../types/quest";
 
 // ─── Styles ───────────────────────────────────────────────────────────────────
 const S = `
-  @import url('https://fonts.googleapis.com/css2?family=Cinzel:wght@700;900&family=Nunito:wght@800;900&display=swap');
 
   /* ══ FULL SCREEN OVERLAY ══ */
   .com-overlay {

src/components/ChoiceCard.tsx

@@ -1,5 +1,4 @@
 const STYLES = `
-  @import url('https://fonts.googleapis.com/css2?family=Nunito:wght@700;800;900&family=Nunito+Sans:wght@600;700&display=swap');
 
   .cc-btn {
     width: 100%;

src/components/CircularLevelProgress.tsx

@@ -12,7 +12,6 @@ type Props = {
 };
 
 const STYLES = `
-  @import url('https://fonts.googleapis.com/css2?family=Nunito:wght@400;700;800;900&family=Nunito+Sans:wght@400;600&display=swap');
 
   .clp-wrap {
     width: 100%;

src/components/ErrorBoundary.tsx

@@ -0,0 +1,83 @@
+import { Component } from "react";
+import type { ErrorInfo, ReactNode } from "react";
+
+interface Props {
+  children: ReactNode;
+}
+
+interface State {
+  hasError: boolean;
+}
+
+export class ErrorBoundary extends Component<Props, State> {
+  constructor(props: Props) {
+    super(props);
+    this.state = { hasError: false };
+  }
+
+  static getDerivedStateFromError(): State {
+    return { hasError: true };
+  }
+
+  componentDidCatch(error: Error, info: ErrorInfo) {
+    console.error("Uncaught error:", error, info.componentStack);
+  }
+
+  render() {
+    if (this.state.hasError) {
+      return (
+        <div
+          style={{
+            minHeight: "100vh",
+            display: "flex",
+            flexDirection: "column",
+            alignItems: "center",
+            justifyContent: "center",
+            fontFamily: "'Nunito', sans-serif",
+            background: "#fffbf4",
+            padding: "2rem",
+            textAlign: "center",
+          }}
+        >
+          <h1
+            style={{
+              fontSize: "1.5rem",
+              fontWeight: 900,
+              color: "#1e1b4b",
+              marginBottom: "0.5rem",
+            }}
+          >
+            Something went wrong
+          </h1>
+          <p
+            style={{
+              fontSize: "0.9rem",
+              color: "#6b7280",
+              marginBottom: "1.5rem",
+            }}
+          >
+            An unexpected error occurred. Please try refreshing the page.
+          </p>
+          <button
+            onClick={() => window.location.reload()}
+            style={{
+              padding: "0.7rem 1.4rem",
+              borderRadius: "100px",
+              border: "none",
+              background: "linear-gradient(135deg, #7c3aed, #a855f7)",
+              color: "white",
+              fontFamily: "'Nunito', sans-serif",
+              fontSize: "0.88rem",
+              fontWeight: 800,
+              cursor: "pointer",
+            }}
+          >
+            Reload page
+          </button>
+        </div>
+      );
+    }
+
+    return this.props.children;
+  }
+}

src/components/InfoHeader.tsx

@@ -17,7 +17,7 @@ import { Avatar, AvatarFallback, AvatarImage } from "./ui/avatar";
 import { Drawer, DrawerContent, DrawerTrigger } from "./ui/drawer";
 import { PredictedScoreCard } from "./PredictedScoreCard";
 import { ChestOpenModal } from "./ChestOpenModal";
-import { generateArcTheme } from "../pages/student/QuestMap";
+import { generateArcTheme } from "../utils/arcTheme";
 import { InventoryButton } from "./InventoryButton";
 
 // ─── Requirement helpers ──────────────────────────────────────────────────────
@@ -43,7 +43,6 @@ const REQ_LABEL: Record<string, string> = {
 
 // ─── Styles ───────────────────────────────────────────────────────────────────
 const STYLES = `
-  @import url('https://fonts.googleapis.com/css2?family=Nunito:wght@700;800;900&family=Nunito+Sans:wght@400;600;700&family=Cinzel:wght@700;900&display=swap');
 
   /* ════ SHARED ANIMATION ════ */
   @keyframes hcIn {

src/components/InventoryButton.tsx

@@ -8,7 +8,6 @@ import { InventoryModal } from "./InventoryModal";
 
 // ─── Styles ───────────────────────────────────────────────────────────────────
 const BTN_STYLES = `
-  @import url('https://fonts.googleapis.com/css2?family=Nunito:wght@800;900&family=Cinzel:wght@700&display=swap');
 
   /* ── Inventory trigger button ── */
   .inv-btn {

src/components/InventoryModal.tsx

@@ -12,7 +12,6 @@ import { api } from "../utils/api";
 
 // ─── Styles ───────────────────────────────────────────────────────────────────
 const STYLES = `
-  @import url('https://fonts.googleapis.com/css2?family=Cinzel:wght@600;700;900&family=Nunito:wght@700;800;900&family=Nunito+Sans:wght@400;600;700&display=swap');
 
   /* ══ OVERLAY ══ */
   .inv-overlay {

src/components/LessonModal.tsx

@@ -24,7 +24,6 @@ const UUID_REGEX =
 const isVideoLesson = (id: string) => UUID_REGEX.test(id);
 
 const STYLES = `
-  @import url('https://fonts.googleapis.com/css2?family=Nunito:wght@400;700;800;900&family=Nunito+Sans:wght@400;600;700&display=swap');
 
   .lm-content {
     font-family: 'Nunito', sans-serif;
@@ -156,6 +155,7 @@ export const LessonModal = ({
   onOpenChange,
 }: LessonModalProps) => {
   const user = useAuthStore((state) => state.user);
+  const token = useAuthStore((state) => state.token);
 
   const [loading, setLoading] = useState(false);
   const [lesson, setLesson] = useState<LessonDetails | null>(null);
@@ -196,12 +196,6 @@ export const LessonModal = ({
       setLoading(true);
 
       try {
-        const authStorage = localStorage.getItem("auth-storage");
-        if (!authStorage) throw new Error("No auth storage");
-        const {
-          // @ts-ignore
-          state: { token },
-        } = JSON.parse(authStorage) as { state?: { token?: string } };
         if (!token) throw new Error("No token");
 
         // @ts-ignore

src/components/PredictedScoreCard.tsx

@@ -83,7 +83,6 @@ const useCountUp = (target: number, duration = 900) => {
 // ─── Styles ───────────────────────────────────────────────────────────────────
 
 const STYLES = `
-  @import url('https://fonts.googleapis.com/css2?family=Nunito:wght@700;800;900&family=Nunito+Sans:wght@400;600;700&display=swap');
 
   .psc-card {
     background: white;

src/components/QuestNodeModal.tsx

@@ -2,7 +2,7 @@ import { useEffect, useState } from "react";
 import { X, Lock } from "lucide-react";
 import type { QuestNode, QuestArc } from "../types/quest";
 // Re-use the same theme generator as QuestMap so island colours are consistent
-import { generateArcTheme } from "../pages/student/QuestMap";
+import { generateArcTheme } from "../utils/arcTheme";
 
 // ─── Requirement helpers (mirrors QuestMap / InfoHeader) ──────────────────────
 const REQ_LABEL: Record<string, string> = {
@@ -28,7 +28,6 @@ const reqIcon = (type: string): string =>
 
 // ─── Styles ───────────────────────────────────────────────────────────────────
 const STYLES = `
-  @import url('https://fonts.googleapis.com/css2?family=Cinzel:wght@600;700;900&family=Sorts+Mill+Goudy:ital@0;1&family=Nunito:wght@700;800;900&family=Nunito+Sans:wght@400;600;700&display=swap');
 
   /* ══ OVERLAY ══ */
   .qnm-overlay {

src/components/RenderQuestionText.tsx

@@ -1,3 +1,4 @@
+import "katex/dist/katex.min.css";
 import { Component, type ReactNode } from "react";
 // @ts-ignore
 import { BlockMath, InlineMath } from "react-katex";

src/components/SearchOverlay.tsx

@@ -188,7 +188,6 @@ const highlightText = (text: string, query: string) => {
 // ─── Styles ───────────────────────────────────────────────────────────────────
 
 const STYLES = `
-  @import url('https://fonts.googleapis.com/css2?family=Nunito:wght@700;800;900&family=Nunito+Sans:wght@400;600;700&display=swap');
 
   .so-overlay {
     position: fixed; inset: 0; z-index: 50;

src/main.tsx

@@ -2,9 +2,12 @@ import { StrictMode } from "react";
 import { createRoot } from "react-dom/client";
 import "./index.css";
 import App from "./App.tsx";
+import { ErrorBoundary } from "./components/ErrorBoundary.tsx";
 
 createRoot(document.getElementById("root")!).render(
   <StrictMode>
-    <App />
+    <ErrorBoundary>
+      <App />
+    </ErrorBoundary>
   </StrictMode>,
 );

src/pages/auth/Login.tsx

@@ -9,7 +9,6 @@ interface LocationState {
 }
 
 const STYLES = `
-  @import url('https://fonts.googleapis.com/css2?family=Nunito:wght@400;700;800;900&family=Nunito+Sans:wght@400;600;700&display=swap');
 
   *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
 

src/pages/auth/Register.tsx

@@ -18,7 +18,6 @@ import {
 import { api } from "../../utils/api";
 
 const STYLES = `
-  @import url('https://fonts.googleapis.com/css2?family=Nunito:wght@400;700;800;900&family=Nunito+Sans:wght@400;600;700&display=swap');
 
   *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
 

src/pages/student/Home.tsx

@@ -19,7 +19,6 @@ const DOTS = [
 ];
 
 const STYLES = `
-  @import url('https://fonts.googleapis.com/css2?family=Nunito:wght@400;700;800;900&family=Nunito+Sans:wght@400;600;700&display=swap');
 
   :root { --content-max: 1100px; }
 
@@ -312,6 +311,7 @@ const PAGE_SIZE = 6;
 
 export const Home = () => {
   const user = useAuthStore((state) => state.user);
+  const token = useAuthStore((state) => state.token);
   const navigate = useNavigate();
 
   const [practiceSheets, setPracticeSheets] = useState<PracticeSheet[]>([]);
@@ -337,14 +337,8 @@ export const Home = () => {
     };
 
     const fetch = async () => {
-      if (!user) return;
+      if (!user || !token) return;
       try {
-        const authStorage = localStorage.getItem("auth-storage");
-        if (!authStorage) return;
-        const {
-          state: { token },
-        } = JSON.parse(authStorage);
-        if (!token) return;
         const sheets = await api.getPracticeSheets(token, 1, 10);
         setPracticeSheets(sheets.data);
         sort(sheets.data);

src/pages/student/Lessons.tsx

@@ -31,7 +31,6 @@ const DOTS = [
 
 // ─── Styles ───────────────────────────────────────────────────────────────────
 const STYLES = `
-  @import url('https://fonts.googleapis.com/css2?family=Nunito:wght@400;700;800;900&family=Nunito+Sans:wght@400;600;700&display=swap');
 
   :root { --content-max: 1100px; }
 
@@ -465,6 +464,7 @@ const VideoCard = ({ lesson, index, searchQuery, onClick }: VideoCardProps) => (
 // ─── Component ────────────────────────────────────────────────────────────────
 export const Lessons = () => {
   const user = useAuthStore((s) => s.user);
+  const token = useAuthStore((s) => s.token);
 
   // Video lessons from API — typed as Lesson[]
   const [allVideos, setAllVideos] = useState<Lesson[]>([]);
@@ -486,17 +486,9 @@ export const Lessons = () => {
 
   useEffect(() => {
     const fetchVideos = async () => {
-      if (!user) return;
+      if (!user || !token) return;
       try {
         setLessonLoading(true);
-        const authStorage = localStorage.getItem("auth-storage");
-        if (!authStorage) return;
-
-        const {
-          // @ts-ignore
-          state: { token },
-        } = JSON.parse(authStorage) as { state?: { token?: string } };
-        if (!token) return;
         const response = await api.fetchLessonVideos(token);
         // response matches LessonsResponse: { data: Lesson[], pagination: ... }
         setAllVideos(response.data);

src/pages/student/Practice.tsx

@@ -12,7 +12,6 @@ const DOTS = [
 ];
 
 const STYLES = `
-  @import url('https://fonts.googleapis.com/css2?family=Nunito:wght@400;700;800;900&family=Nunito+Sans:wght@400;600;700&display=swap');
 
   :root { --content-max: 1100px; }
 

src/pages/student/Profile.tsx

@@ -17,7 +17,6 @@ const DOTS = [
 ];
 
 const STYLES = `
-  @import url('https://fonts.googleapis.com/css2?family=Nunito:wght@400;700;800;900&family=Nunito+Sans:wght@400;600;700&display=swap');
 
   :root { --content-max: 1100px; }
 

src/pages/student/QuestMap.tsx

@@ -7,6 +7,7 @@ import type {
 import { useQuestStore } from "../../stores/useQuestStore";
 import { useAuthStore } from "../../stores/authStore";
 import { api } from "../../utils/api";
+import { generateArcTheme, mkRng, strToSeed, type ArcTheme } from "../../utils/arcTheme";
 import { QuestNodeModal } from "../../components/QuestNodeModal";
 import { ChestOpenModal } from "../../components/ChestOpenModal";
 import { InfoHeader } from "../../components/InfoHeader";
@@ -21,22 +22,7 @@ const TOP_PAD = 80;
 const ROW_H = 520; // vertical step per island (increased for more separation)
 
 // ─── Seeded RNG ───────────────────────────────────────────────────────────────
-const mkRng = (seed: number) => {
+// mkRng, strToSeed imported from ../../utils/arcTheme
-  let s = seed >>> 0;
-  return () => {
-    s += 0x6d2b79f5;
-    let t = Math.imul(s ^ (s >>> 15), 1 | s);
-    t ^= t + Math.imul(t ^ (t >>> 7), 61 | t);
-    return ((t ^ (t >>> 14)) >>> 0) / 4294967296;
-  };
-};
-
-const strToSeed = (str: string) => {
-  let h = 5381;
-  for (let i = 0; i < str.length; i++)
-    h = (Math.imul(h, 33) ^ str.charCodeAt(i)) >>> 0;
-  return h;
-};
 
 // ─── Random island positions ──────────────────────────────────────────────────
 // Generates organic-feeling positions that zigzag downward with random offsets.
@@ -102,8 +88,7 @@ const generateIslandPositions = (
 
 // ─── Styles ───────────────────────────────────────────────────────────────────
 const STYLES = `
-  @import url('https://fonts.googleapis.com/css2?family=Nunito:wght@700;800;900&family=Nunito+Sans:wght@400;600;700&family=Cinzel:wght@700;900&display=swap');
+
-  @import url('https://fonts.googleapis.com/css2?family=Sorts+Mill+Goudy:ital@0;1&display=swap');
 
   * { box-sizing: border-box; }
 
@@ -601,92 +586,7 @@ const ERROR_STYLES = `
 `;
 
 // ─── Arc theme ────────────────────────────────────────────────────────────────
-export interface ArcTheme {
+// ArcTheme, generateArcTheme imported from ../../utils/arcTheme
-  accent: string;
-  accentDark: string;
-  bgFrom: string;
-  bgTo: string;
-  emoji: string;
-  terrain: { l: string; m: string; d: string; s: string };
-  decos: [string, string, string];
-}
-
-const DECO_SETS: [string, string, string][] = [
-  ["🌴", "🌿", "🌴"],
-  ["🌵", "🏺", "🌵"],
-  ["☁️", "✨", "☁️"],
-  ["🪨", "🌾", "🪨"],
-  ["🍄", "🌸", "🍄"],
-  ["🔥", "💀", "🔥"],
-  ["❄️", "🌨️", "❄️"],
-  ["🌺", "🦜", "🌺"],
-];
-
-const hslToHex = (h: number, s: number, l: number) => {
-  const a = s * Math.min(l, 1 - l);
-  const f = (n: number) => {
-    const k = (n + h * 12) % 12;
-    const c = l - a * Math.max(-1, Math.min(k - 3, 9 - k, 1));
-    return Math.round(255 * c)
-      .toString(16)
-      .padStart(2, "0");
-  };
-  return `#${f(0)}${f(8)}${f(4)}`;
-};
-
-export const generateArcTheme = (arc: QuestArc): ArcTheme => {
-  const rng = mkRng(strToSeed(arc.id));
-  const anchors = [150, 165, 180, 200, 230, 260];
-  const baseHue =
-    anchors[Math.floor(rng() * anchors.length)] + (rng() - 0.5) * 8;
-  const satBase = 0.48 + rng() * 0.18;
-  const satTerrain = Math.min(0.8, satBase + 0.12);
-  const accentLightL = 0.48 + rng() * 0.12;
-  const accentDarkL = 0.22 + rng() * 0.06;
-  const bgFromL = 0.04 + rng() * 0.06;
-  const bgToL = 0.1 + rng() * 0.06;
-  const accent = hslToHex(baseHue, satBase, accentLightL);
-  const accentDark = hslToHex(
-    baseHue + (rng() * 6 - 3),
-    Math.max(0.35, satBase - 0.08),
-    accentDarkL,
-  );
-  const bgFrom = hslToHex(
-    baseHue + (rng() * 10 - 5),
-    0.1 + rng() * 0.06,
-    bgFromL,
-  );
-  const bgTo = hslToHex(baseHue + (6 + rng() * 12), 0.08 + rng() * 0.06, bgToL);
-  const tL = hslToHex(
-    baseHue + 10 + rng() * 6,
-    Math.min(0.85, satTerrain),
-    0.36 + rng() * 0.08,
-  );
-  const tM = hslToHex(
-    baseHue + (rng() * 6 - 3),
-    Math.min(0.72, satTerrain - 0.06),
-    0.24 + rng() * 0.06,
-  );
-  const tD = hslToHex(
-    baseHue + (rng() * 8 - 4),
-    Math.max(0.38, satBase - 0.18),
-    0.1 + rng() * 0.04,
-  );
-  const sd = parseInt(tD.slice(1, 3), 16);
-  const sg = parseInt(tD.slice(3, 5), 16);
-  const sb = parseInt(tD.slice(5, 7), 16);
-  const emojis = ["🌿", "🌲", "🌳", "🌺", "🪨", "🍄", "🌵"];
-  const emoji = emojis[Math.floor(rng() * emojis.length)];
-  return {
-    accent,
-    accentDark,
-    bgFrom,
-    bgTo,
-    emoji,
-    terrain: { l: tL, m: tM, d: tD, s: `rgba(${sd},${sg},${sb},0.6)` },
-    decos: DECO_SETS[Math.floor(rng() * DECO_SETS.length)],
-  };
-};
 
 const themeCache = new Map<string, ArcTheme>();
 const getArcTheme = (arc: QuestArc): ArcTheme => {

src/pages/student/Rewards.tsx

@@ -31,7 +31,6 @@ const DOTS = [
 ];
 
 const STYLES = `
-  @import url('https://fonts.googleapis.com/css2?family=Nunito:wght@400;700;800;900&family=Nunito+Sans:wght@400;600;700&display=swap');
 
   :root { --content-max: 1100px; }
 
@@ -415,6 +414,7 @@ const EmptyState = () => (
 
 export const Rewards = () => {
   const user = useAuthStore((state) => state.user);
+  const token = useAuthStore((state) => state.token);
   const [time, setTime] = useState("today");
   const [activeTab, setActiveTab] = useState<TabId>("xp");
   const [leaderboard, setLeaderboard] = useState<Leaderboard | undefined>();
@@ -431,20 +431,15 @@ export const Rewards = () => {
 
   useEffect(() => {
     const fetchData = async () => {
-      if (!user) return;
+      if (!user || !token) return;
-      const authStorage = localStorage.getItem("auth-storage");
-      if (!authStorage) return;
-      const parsed = JSON.parse(authStorage) as {
-        state?: { token?: string };
-      } | null;
-      const token = parsed?.state?.token;
-      if (!token) return;
       try {
         setLoading(true);
+        const timeframe =
+          activeTab === "streaks" ? "all_time" : (TIME_MAP[time] ?? "daily");
         const response = await api.fetchLeaderboard(
           token,
           activeTab,
-          TIME_MAP[time] ?? "daily",
+          timeframe,
         );
         setLeaderboard(response);
         // ✅ FIX 1: Guard against null user_rank before accessing its properties
@@ -563,9 +558,13 @@ export const Rewards = () => {
             </div>
 
             <DropdownMenu>
-              <DropdownMenuTrigger asChild>
+              <DropdownMenuTrigger asChild disabled={activeTab === "streaks"}>
-                <button className="rw-filter-btn">
+                <button
-                  {formatTimeLabel(time)} <ChevronDown size={13} />
+                  className="rw-filter-btn"
+                  style={activeTab === "streaks" ? { opacity: 0.5, cursor: "not-allowed" } : undefined}
+                >
+                  {activeTab === "streaks" ? "All Time" : formatTimeLabel(time)}{" "}
+                  <ChevronDown size={13} />
                 </button>
               </DropdownMenuTrigger>
               <DropdownMenuContent

src/pages/student/StudentLayout.tsx

@@ -57,8 +57,7 @@ const QUEST_NAV_ITEMS = NAV_ITEMS.map((item) =>
 );
 
 const STYLES = `
-  @import url('https://fonts.googleapis.com/css2?family=Nunito:wght@700;800;900&family=Cinzel:wght@700&display=swap');
+
-  @import url('https://fonts.googleapis.com/css2?family=Sorts+Mill+Goudy:ital@0;1&display=swap');
 
   /* ══ DEFAULT dock (cream frosted glass) ══ */
   .sl-dock-wrap {

src/pages/student/drills/page.tsx

@@ -22,7 +22,6 @@ const DOTS = [
 ];
 
 const STYLES = `
-  @import url('https://fonts.googleapis.com/css2?family=Nunito:wght@400;700;800;900&family=Nunito+Sans:wght@400;600;700&display=swap');
 
   :root { --content-max: 1100px; }
 
@@ -281,6 +280,7 @@ const STYLES = `
 
 export const Drills = () => {
   const user = useAuthStore((state) => state.user);
+  const token = useAuthStore((state) => state.token);
   const navigate = useNavigate();
 
   const [direction, setDirection] = useState<1 | -1>(1);
@@ -319,16 +319,9 @@ export const Drills = () => {
 
   useEffect(() => {
     const fetchAllTopics = async () => {
-      if (!user) return;
+      if (!user || !token) return;
       try {
         setLoading(true);
-        const authStorage = localStorage.getItem("auth-storage");
-        if (!authStorage) return;
-        const parsed = JSON.parse(authStorage) as {
-          state?: { token?: string };
-        } | null;
-        const token = parsed?.state?.token;
-        if (!token) return;
         const response = await api.fetchAllTopics(token);
         setTopics(response);
       } catch (e) {

src/pages/student/hard-test-modules/page.tsx

@@ -24,7 +24,6 @@ const DOTS = [
 ];
 
 const STYLES = `
-  @import url('https://fonts.googleapis.com/css2?family=Nunito:wght@400;700;800;900&family=Nunito+Sans:wght@400;600;700&display=swap');
 
   :root { --content-max: 1100px; }
 

src/pages/student/practice-sheet/page.tsx

@@ -17,6 +17,7 @@ import {
 import { useNavigate } from "react-router-dom";
 import { api } from "../../../utils/api";
 import { type PracticeSheet } from "../../../types/sheet";
+import { useAuthStore } from "../../../stores/authStore";
 
 /* ─────────────────────────────────────────────
    Ambient decoration
@@ -415,7 +416,6 @@ const EmptyState = ({ query }: { query: string }) => (
    Styles
 ───────────────────────────────────────────── */
 const STYLES = `
-  @import url('https://fonts.googleapis.com/css2?family=Nunito:wght@400;700;800;900&family=Nunito+Sans:wght@400;600;700&display=swap');
 
   :root { --content-max: 1100px; }
 
@@ -700,6 +700,7 @@ type ViewMode = "standard" | "compact";
 
 export const PracticeSheetList = () => {
   const navigate = useNavigate();
+  const token = useAuthStore((state) => state.token);
   const [sheets, setSheets] = useState<PracticeSheet[]>([]);
   const [loading, setLoading] = useState(true);
   const [error, setError] = useState<string | null>(null);
@@ -707,13 +708,8 @@ export const PracticeSheetList = () => {
   const [viewMode, setViewMode] = useState<ViewMode>("compact");
 
   useEffect(() => {
-    setLoading(true);
-    const authStorage = localStorage.getItem("auth-storage");
-    if (!authStorage) return;
-    const {
-      state: { token },
-    } = JSON.parse(authStorage);
     if (!token) return;
+    setLoading(true);
     api
       .getPracticeSheets(token, 1, 10)
       .then((data) => {

src/pages/student/practice/Pretest.tsx

@@ -23,7 +23,6 @@ const DOTS = [
 ];
 
 const STYLES = `
-  @import url('https://fonts.googleapis.com/css2?family=Nunito:wght@400;700;800;900&family=Nunito+Sans:wght@400;600;700&display=swap');
 
   :root { --content-max: 1100px; }
 
@@ -227,6 +226,7 @@ export const Pretest = () => {
   const { setSheetId, setMode, storeDuration, setQuestionCount } =
     useExamConfigStore();
   const user = useAuthStore((state) => state.user);
+  const token = useAuthStore((state) => state.token);
   const { sheetId } = useParams<{ sheetId: string }>();
   const navigate = useNavigate();
 
@@ -246,15 +246,9 @@ export const Pretest = () => {
   }
 
   useEffect(() => {
-    if (!user) return;
+    if (!user || !token) return;
     async function fetchSheet(id: string) {
-      const authStorage = localStorage.getItem("auth-storage");
+      const data = await api.getPracticeSheetById(token!, id);
-      if (!authStorage) return;
-      const {
-        state: { token },
-      } = JSON.parse(authStorage);
-      if (!token) return;
-      const data = await api.getPracticeSheetById(token, id);
       setPracticeSheet(data);
     }
     fetchSheet(sheetId!);

src/pages/student/practice/Results.tsx

@@ -8,7 +8,6 @@ import { useAuthStore } from "../../../stores/authStore";
 
 // ─── Shared styles injected once ─────────────────────────────────────────────
 const STYLES = `
-  @import url('https://fonts.googleapis.com/css2?family=Nunito:wght@400;700;800;900&family=Nunito+Sans:wght@400;600&display=swap');
 
   :root { --content-max: 1100px; }
 

src/pages/student/practice/Test.tsx

@@ -91,7 +91,6 @@ const DOTS = [
 
 // ─── Global Styles ────────────────────────────────────────────────────────────
 const GLOBAL_STYLES = `
-  @import url('https://fonts.googleapis.com/css2?family=Nunito:wght@400;600;700;800;900&family=Nunito+Sans:wght@400;600;700&display=swap');
 
   :root { --content-max: 1100px; }
 

src/pages/student/targeted-practice/page.tsx

@@ -66,7 +66,6 @@ const getSectionMeta = (section?: string) =>
   SECTION_META[section ?? ""] ?? SECTION_META["default"];
 
 const STYLES = `
-  @import url('https://fonts.googleapis.com/css2?family=Nunito:wght@400;700;800;900&family=Nunito+Sans:wght@400;600;700&display=swap');
 
   :root { --content-max: 1100px; }
 
@@ -508,16 +507,9 @@ export const TargetedPractice = () => {
 
   useEffect(() => {
     const fetchAllTopics = async () => {
-      if (!user) return;
+      if (!user || !token) return;
       try {
         setLoading(true);
-        const authStorage = localStorage.getItem("auth-storage");
-        if (!authStorage) return;
-        const parsed = JSON.parse(authStorage) as {
-          state?: { token?: string };
-        } | null;
-        const token = parsed?.state?.token;
-        if (!token) return;
         const response = await api.fetchAllTopics(token);
         setTopics(response);
       } catch (error) {

src/stores/authStore.ts

@@ -68,6 +68,7 @@ export const useAuthStore = create<AuthState>()(
 
           set({
             registrationMessage: response.message,
+            isLoading: false,
           });
 
           return true;
@@ -119,3 +120,8 @@ export const useAuthStore = create<AuthState>()(
     },
   ),
 );
+
+/** Safe non-hook token accessor for use outside React components or in callbacks */
+export function getAuthToken(): string | null {
+  return useAuthStore.getState().token;
+}

src/utils/arcTheme.ts

@@ -0,0 +1,105 @@
+import type { QuestArc } from "../types/quest";
+
+export interface ArcTheme {
+  accent: string;
+  accentDark: string;
+  bgFrom: string;
+  bgTo: string;
+  emoji: string;
+  terrain: { l: string; m: string; d: string; s: string };
+  decos: [string, string, string];
+}
+
+export const mkRng = (seed: number) => {
+  let s = seed >>> 0;
+  return () => {
+    s += 0x6d2b79f5;
+    let t = Math.imul(s ^ (s >>> 15), 1 | s);
+    t ^= t + Math.imul(t ^ (t >>> 7), 61 | t);
+    return ((t ^ (t >>> 14)) >>> 0) / 4294967296;
+  };
+};
+
+export const strToSeed = (str: string) => {
+  let h = 5381;
+  for (let i = 0; i < str.length; i++)
+    h = (Math.imul(h, 33) ^ str.charCodeAt(i)) >>> 0;
+  return h;
+};
+
+const hslToHex = (h: number, s: number, l: number) => {
+  const a = s * Math.min(l, 1 - l);
+  const f = (n: number) => {
+    const k = (n + h * 12) % 12;
+    const c = l - a * Math.max(-1, Math.min(k - 3, 9 - k, 1));
+    return Math.round(255 * c)
+      .toString(16)
+      .padStart(2, "0");
+  };
+  return `#${f(0)}${f(8)}${f(4)}`;
+};
+
+const DECO_SETS: [string, string, string][] = [
+  ["\u{1F334}", "\u{1F33F}", "\u{1F334}"],
+  ["\u{1F335}", "\u{1F3FA}", "\u{1F335}"],
+  ["\u2601\uFE0F", "\u2728", "\u2601\uFE0F"],
+  ["\u{1FAA8}", "\u{1F33E}", "\u{1FAA8}"],
+  ["\u{1F344}", "\u{1F338}", "\u{1F344}"],
+  ["\u{1F525}", "\u{1F480}", "\u{1F525}"],
+  ["\u2744\uFE0F", "\u{1F328}\uFE0F", "\u2744\uFE0F"],
+  ["\u{1F33A}", "\u{1F99C}", "\u{1F33A}"],
+];
+
+export const generateArcTheme = (arc: QuestArc): ArcTheme => {
+  const rng = mkRng(strToSeed(arc.id));
+  const anchors = [150, 165, 180, 200, 230, 260];
+  const baseHue =
+    anchors[Math.floor(rng() * anchors.length)] + (rng() - 0.5) * 8;
+  const satBase = 0.48 + rng() * 0.18;
+  const satTerrain = Math.min(0.8, satBase + 0.12);
+  const accentLightL = 0.48 + rng() * 0.12;
+  const accentDarkL = 0.22 + rng() * 0.06;
+  const bgFromL = 0.04 + rng() * 0.06;
+  const bgToL = 0.1 + rng() * 0.06;
+  const accent = hslToHex(baseHue, satBase, accentLightL);
+  const accentDark = hslToHex(
+    baseHue + (rng() * 6 - 3),
+    Math.max(0.35, satBase - 0.08),
+    accentDarkL,
+  );
+  const bgFrom = hslToHex(
+    baseHue + (rng() * 10 - 5),
+    0.1 + rng() * 0.06,
+    bgFromL,
+  );
+  const bgTo = hslToHex(baseHue + (6 + rng() * 12), 0.08 + rng() * 0.06, bgToL);
+  const tL = hslToHex(
+    baseHue + 10 + rng() * 6,
+    Math.min(0.85, satTerrain),
+    0.36 + rng() * 0.08,
+  );
+  const tM = hslToHex(
+    baseHue + (rng() * 6 - 3),
+    Math.min(0.72, satTerrain - 0.06),
+    0.24 + rng() * 0.06,
+  );
+  const tD = hslToHex(
+    baseHue + (rng() * 8 - 4),
+    Math.max(0.38, satBase - 0.18),
+    0.1 + rng() * 0.04,
+  );
+  const sd = parseInt(tD.slice(1, 3), 16);
+  const sg = parseInt(tD.slice(3, 5), 16);
+  const sb = parseInt(tD.slice(5, 7), 16);
+  const emojis = ["\u{1F33F}", "\u{1F332}", "\u{1F333}", "\u{1F33A}", "\u{1FAA8}", "\u{1F344}", "\u{1F335}"];
+  const emoji = emojis[Math.floor(rng() * emojis.length)];
+  return {
+    accent,
+    accentDark,
+    bgFrom,
+    bgTo,
+    emoji,
+    terrain: { l: tL, m: tM, d: tD, s: `rgba(${sd},${sg},${sb},0.6)` },
+    decos: DECO_SETS[Math.floor(rng() * DECO_SETS.length)],
+  };
+};

vite.config.ts

@@ -15,7 +15,13 @@ export default defineConfig({
     rollupOptions: {
       output: {
         manualChunks: {
-          troika: ["troika-three-text", "troika-worker-utils"],
+          three: [
+            "three",
+            "@react-three/fiber",
+            "@react-three/drei",
+            "troika-three-text",
+            "troika-worker-utils",
+          ],
         },
       },
     },