Split each chapter's problems and quiz so the atlas loads only problems

CLAUDE.md

@@ -82,7 +82,8 @@ lib/highlight.tsx lib/progress.tsx lib/curriculum.ts lib/i18n.tsx
 app/<ch>/page.tsx      chapter page ("use client"; data + composition)
 app/<ch>/viz.tsx       visualizations specific to this chapter
 app/<ch>/chapter.css   styles specific to this chapter (imported by page.tsx)
-lib/<ch>-data.tsx      this chapter's PROBLEMS + QUIZ data
+lib/<ch>-problems.tsx  this chapter's PROBLEMS (the atlas imports these too)
+lib/<ch>-quiz.tsx      this chapter's QUIZ (kept apart so the atlas does not load it)
 ```
 
 Each chapter's palette comes free from `<main className="page" data-ch="<id>">`

app/advanced/page.tsx

@@ -25,7 +25,8 @@ import { CodeTabs, CodeBlock } from "@/lib/code";
 import { ArrayStepper, type ArrayFrame } from "@/lib/stepper";
 import { ProblemSet } from "@/lib/problems";
 import { Quiz } from "@/lib/quiz";
-import { PROBLEMS, QUIZ } from "@/lib/advanced-data";
+import { PROBLEMS } from "@/lib/advanced-problems";
+import { QUIZ } from "@/lib/advanced-quiz";
 import { T } from "@/lib/i18n";
 import {
   LRUAnatomy,

app/array/page.tsx

@@ -21,7 +21,8 @@ import { CodeTabs } from "@/lib/code";
 import { ArrayStepper, type ArrayFrame } from "@/lib/stepper";
 import { ProblemSet } from "@/lib/problems";
 import { Quiz } from "@/lib/quiz";
-import { PROBLEMS, QUIZ } from "@/lib/array-data";
+import { PROBLEMS } from "@/lib/array-problems";
+import { QUIZ } from "@/lib/array-quiz";
 import { T } from "@/lib/i18n";
 import { IndexLab, ShiftLab, GrowLab, MatrixLab } from "./viz";
 

app/atlas/page.tsx

@@ -23,19 +23,19 @@ import { CHAPTERS, type ChapterId } from "@/lib/curriculum";
 import { useL, T, type Loc } from "@/lib/i18n";
 import { DecisionLab } from "./viz";
 
-import { PROBLEMS as P_ARRAY } from "@/lib/array-data";
-import { PROBLEMS as P_STRING } from "@/lib/string-data";
-import { PROBLEMS as P_LIST } from "@/lib/linked-list-data";
-import { PROBLEMS as P_STACK } from "@/lib/stack-data";
-import { PROBLEMS as P_QUEUE } from "@/lib/queue-data";
-import { PROBLEMS as P_HASH } from "@/lib/hash-data";
-import { PROBLEMS as P_BTREE } from "@/lib/binary-tree-data";
-import { PROBLEMS as P_BST } from "@/lib/bst-data";
-import { PROBLEMS as P_HEAP } from "@/lib/heap-data";
-import { PROBLEMS as P_TRIE } from "@/lib/trie-data";
-import { PROBLEMS as P_UF } from "@/lib/union-find-data";
-import { PROBLEMS as P_GRAPH } from "@/lib/graph-data";
-import { PROBLEMS as P_ADV } from "@/lib/advanced-data";
+import { PROBLEMS as P_ARRAY } from "@/lib/array-problems";
+import { PROBLEMS as P_STRING } from "@/lib/string-problems";
+import { PROBLEMS as P_LIST } from "@/lib/linked-list-problems";
+import { PROBLEMS as P_STACK } from "@/lib/stack-problems";
+import { PROBLEMS as P_QUEUE } from "@/lib/queue-problems";
+import { PROBLEMS as P_HASH } from "@/lib/hash-problems";
+import { PROBLEMS as P_BTREE } from "@/lib/binary-tree-problems";
+import { PROBLEMS as P_BST } from "@/lib/bst-problems";
+import { PROBLEMS as P_HEAP } from "@/lib/heap-problems";
+import { PROBLEMS as P_TRIE } from "@/lib/trie-problems";
+import { PROBLEMS as P_UF } from "@/lib/union-find-problems";
+import { PROBLEMS as P_GRAPH } from "@/lib/graph-problems";
+import { PROBLEMS as P_ADV } from "@/lib/advanced-problems";
 
 /* ---------- Course-wide problem set groups ---------- */
 

app/binary-tree/page.tsx

@@ -21,7 +21,8 @@ import {
 import { CodeTabs } from "@/lib/code";
 import { ProblemSet } from "@/lib/problems";
 import { Quiz } from "@/lib/quiz";
-import { PROBLEMS, QUIZ } from "@/lib/binary-tree-data";
+import { PROBLEMS } from "@/lib/binary-tree-problems";
+import { QUIZ } from "@/lib/binary-tree-quiz";
 import { T } from "@/lib/i18n";
 import {
   TermTree,

app/bst/page.tsx

@@ -28,7 +28,8 @@ import { ArrayStepper, type ArrayFrame } from "@/lib/stepper";
 import { ProblemSet } from "@/lib/problems";
 import { Quiz } from "@/lib/quiz";
 import { T, type Loc } from "@/lib/i18n";
-import { PROBLEMS, QUIZ } from "@/lib/bst-data";
+import { PROBLEMS } from "@/lib/bst-problems";
+import { QUIZ } from "@/lib/bst-quiz";
 import {
   BSTLab,
   InorderFig,

app/graph/page.tsx

@@ -23,7 +23,8 @@ import {
 import { CodeTabs } from "@/lib/code";
 import { ProblemSet } from "@/lib/problems";
 import { Quiz } from "@/lib/quiz";
-import { PROBLEMS, QUIZ } from "@/lib/graph-data";
+import { PROBLEMS } from "@/lib/graph-problems";
+import { QUIZ } from "@/lib/graph-quiz";
 import { T } from "@/lib/i18n";
 import {
   TermGraph,

app/hash/page.tsx

@@ -21,7 +21,8 @@ import { CodeTabs } from "@/lib/code";
 import { ArrayStepper, type ArrayFrame } from "@/lib/stepper";
 import { ProblemSet } from "@/lib/problems";
 import { Quiz } from "@/lib/quiz";
-import { PROBLEMS, QUIZ } from "@/lib/hash-data";
+import { PROBLEMS } from "@/lib/hash-problems";
+import { QUIZ } from "@/lib/hash-quiz";
 import { T } from "@/lib/i18n";
 import { HashLab, CollisionLab } from "./viz";
 import "./chapter.css";

app/heap/page.tsx

@@ -27,7 +27,8 @@ import { CodeTabs } from "@/lib/code";
 import { ArrayStepper, type ArrayFrame } from "@/lib/stepper";
 import { ProblemSet } from "@/lib/problems";
 import { Quiz } from "@/lib/quiz";
-import { PROBLEMS, QUIZ } from "@/lib/heap-data";
+import { PROBLEMS } from "@/lib/heap-problems";
+import { QUIZ } from "@/lib/heap-quiz";
 import { T } from "@/lib/i18n";
 import { HeapLab, HeapMapFig } from "./viz";
 

app/linked-list/page.tsx

@@ -25,7 +25,8 @@ import {
 import { CodeTabs } from "@/lib/code";
 import { ProblemSet } from "@/lib/problems";
 import { Quiz } from "@/lib/quiz";
-import { PROBLEMS, QUIZ } from "@/lib/linked-list-data";
+import { PROBLEMS } from "@/lib/linked-list-problems";
+import { QUIZ } from "@/lib/linked-list-quiz";
 import { T } from "@/lib/i18n";
 import { ScatterMap, LinkedLab, ReverseAnim, CycleAnim, MergeAnim } from "./viz";
 import "./chapter.css";

app/queue/page.tsx

@@ -27,7 +27,8 @@ import { CodeTabs } from "@/lib/code";
 import { ArrayStepper, type ArrayFrame } from "@/lib/stepper";
 import { ProblemSet } from "@/lib/problems";
 import { Quiz } from "@/lib/quiz";
-import { PROBLEMS, QUIZ } from "@/lib/queue-data";
+import { PROBLEMS } from "@/lib/queue-problems";
+import { QUIZ } from "@/lib/queue-quiz";
 import { T } from "@/lib/i18n";
 import { QueueMemFig, RingLab, TwoStackPour } from "./viz";
 

app/stack/page.tsx

@@ -24,7 +24,8 @@ import { CodeTabs } from "@/lib/code";
 import { ArrayStepper, type ArrayFrame } from "@/lib/stepper";
 import { ProblemSet } from "@/lib/problems";
 import { Quiz } from "@/lib/quiz";
-import { PROBLEMS, QUIZ } from "@/lib/stack-data";
+import { PROBLEMS } from "@/lib/stack-problems";
+import { QUIZ } from "@/lib/stack-quiz";
 import { T } from "@/lib/i18n";
 import { StackMemFig, StackLab, CallStackDemo } from "./viz";
 

app/string/page.tsx

@@ -25,7 +25,8 @@ import { ArrayStepper, type ArrayFrame } from "@/lib/stepper";
 import { ProblemSet } from "@/lib/problems";
 import { Quiz } from "@/lib/quiz";
 import { T, useL } from "@/lib/i18n";
-import { PROBLEMS, QUIZ } from "@/lib/string-data";
+import { PROBLEMS } from "@/lib/string-problems";
+import { QUIZ } from "@/lib/string-quiz";
 import { EncodeLab, ConcatLab } from "./viz";
 import "./chapter.css";
 

app/trie/page.tsx

@@ -20,7 +20,8 @@ import {
 import { CodeTabs } from "@/lib/code";
 import { ProblemSet } from "@/lib/problems";
 import { Quiz } from "@/lib/quiz";
-import { PROBLEMS, QUIZ } from "@/lib/trie-data";
+import { PROBLEMS } from "@/lib/trie-problems";
+import { QUIZ } from "@/lib/trie-quiz";
 import { T } from "@/lib/i18n";
 import {
   TrieLab,

app/union-find/page.tsx

@@ -35,7 +35,8 @@ import { CodeTabs } from "@/lib/code";
 import { ArrayStepper, type ArrayFrame } from "@/lib/stepper";
 import { ProblemSet } from "@/lib/problems";
 import { Quiz } from "@/lib/quiz";
-import { PROBLEMS, QUIZ } from "@/lib/union-find-data";
+import { PROBLEMS } from "@/lib/union-find-problems";
+import { QUIZ } from "@/lib/union-find-quiz";
 import { T } from "@/lib/i18n";
 import { UFLab } from "./viz";
 import "./chapter.css";