feat(lessons): add lessons from client db

src/pages/student/lessons/EBRWVocabMeaningLesson.tsx

@@ -0,0 +1,390 @@
+import React, { useRef, useState, useEffect } from "react";
+import { ArrowDown, Check, BookOpen, AlertTriangle, Zap } from "lucide-react";
+import ContextEliminationWidget, {
+  type VocabExercise,
+} from "../../../components/lessons/ContextEliminationWidget";
+import { PracticeFromDataset } from "../../../components/lessons/LessonShell";
+import {
+  WORDS_CONTEXT_EASY,
+  WORDS_CONTEXT_MEDIUM,
+} from "../../../data/rw/words-in-context";
+
+interface LessonProps {
+  onFinish?: () => void;
+}
+
+const EBRWVocabMeaningLesson: React.FC<LessonProps> = ({ onFinish }) => {
+  const [activeSection, setActiveSection] = useState(0);
+  const sectionsRef = useRef<(HTMLElement | null)[]>([]);
+
+  useEffect(() => {
+    const observers: IntersectionObserver[] = [];
+    sectionsRef.current.forEach((el, idx) => {
+      if (!el) return;
+      const obs = new IntersectionObserver(
+        ([entry]) => {
+          if (entry.isIntersecting) setActiveSection(idx);
+        },
+        { threshold: 0.3 },
+      );
+      obs.observe(el);
+      observers.push(obs);
+    });
+    return () => observers.forEach((o) => o.disconnect());
+  }, []);
+
+  const scrollToSection = (i: number) => {
+    setActiveSection(i);
+    sectionsRef.current[i]?.scrollIntoView({ behavior: "smooth" });
+  };
+
+  const SectionMarker = ({
+    index,
+    title,
+    icon: Icon,
+  }: {
+    index: number;
+    title: string;
+    icon: React.ElementType;
+  }) => {
+    const isActive = activeSection === index;
+    const isPast = activeSection > index;
+    return (
+      <button
+        onClick={() => scrollToSection(index)}
+        className={`flex items-center gap-3 p-3 w-full rounded-lg text-left transition-all ${isActive ? "bg-rose-50" : "hover:bg-slate-50"}`}
+      >
+        <div
+          className={`w-8 h-8 rounded-full flex items-center justify-center shrink-0 ${isActive ? "bg-rose-600 text-white" : isPast ? "bg-rose-400 text-white" : "bg-slate-200 text-slate-500"}`}
+        >
+          {isPast ? (
+            <Check className="w-4 h-4" />
+          ) : (
+            <Icon className="w-4 h-4" />
+          )}
+        </div>
+        <p
+          className={`text-sm font-bold ${isActive ? "text-rose-900" : "text-slate-600"}`}
+        >
+          {title}
+        </p>
+      </button>
+    );
+  };
+
+  const VOCAB_EXERCISES: VocabExercise[] = [
+    {
+      sentence:
+        "The critic's review was pointed, cutting directly to the weaknesses of the performance without any diplomatic softening.",
+      word: "pointed",
+      question: "As used in this sentence, 'pointed' most nearly means:",
+      options: [
+        {
+          id: "A",
+          definition: "having a sharp physical tip",
+          isCorrect: false,
+          elimReason:
+            "This is the literal, physical meaning. In a review context, 'pointed' describes the directness of criticism, not a physical shape.",
+        },
+        {
+          id: "B",
+          definition: "deliberately directed and sharply critical",
+          isCorrect: true,
+          elimReason:
+            "Correct — 'pointed' here means incisively critical and direct. The phrase 'cutting directly to the weaknesses' confirms the metaphorical sharpness of the critique.",
+        },
+        {
+          id: "C",
+          definition: "polite and professionally worded",
+          isCorrect: false,
+          elimReason:
+            "Opposite — the sentence says 'without diplomatic softening,' meaning the review was NOT polite. Eliminate on opposite-meaning grounds.",
+        },
+        {
+          id: "D",
+          definition: "carefully structured and well-organized",
+          isCorrect: false,
+          elimReason:
+            "The sentence emphasizes directness and impact, not organization. 'Pointed' is about force, not structure.",
+        },
+      ],
+    },
+    {
+      sentence:
+        "The administration's new policy represented a marked departure from the approach taken by its predecessor.",
+      word: "marked",
+      question: "As used in this sentence, 'marked' most nearly means:",
+      options: [
+        {
+          id: "A",
+          definition: "labeled or indicated with a visible sign",
+          isCorrect: false,
+          elimReason:
+            "Physical marking meaning. Here 'marked departure' is an idiom meaning notable/significant departure — no literal label is involved.",
+        },
+        {
+          id: "B",
+          definition: "slight and barely noticeable",
+          isCorrect: false,
+          elimReason:
+            "Opposite connotation — 'marked' as an adjective before a noun means striking or significant, the opposite of slight.",
+        },
+        {
+          id: "C",
+          definition: "clearly noticeable and significant",
+          isCorrect: true,
+          elimReason:
+            "Correct — 'a marked departure' means a clearly noticeable, significant change. This is the standard idiomatic meaning of 'marked' as an adjective.",
+        },
+        {
+          id: "D",
+          definition: "controversial and widely debated",
+          isCorrect: false,
+          elimReason:
+            "The sentence says nothing about controversy — it only describes how different the policy is. 'Marked' means notable, not controversial.",
+        },
+      ],
+    },
+    {
+      sentence:
+        "Despite the economic pressures, the nonprofit remained committed to its founding mission, refusing to compromise its principles.",
+      word: "compromise",
+      question: "As used in this sentence, 'compromise' most nearly means:",
+      options: [
+        {
+          id: "A",
+          definition: "reach a mutual agreement through negotiation",
+          isCorrect: false,
+          elimReason:
+            "This is the common meaning of 'compromise' as a noun/verb in negotiations. Here it's used differently — to weaken or undermine.",
+        },
+        {
+          id: "B",
+          definition: "weaken or undermine",
+          isCorrect: true,
+          elimReason:
+            "Correct — 'compromise its principles' means to weaken or betray them. This is the secondary meaning of 'compromise' as a verb: to expose to risk or damage.",
+        },
+        {
+          id: "C",
+          definition: "publicly disclose or reveal",
+          isCorrect: false,
+          elimReason:
+            "This meaning applies to 'compromise' in security contexts (e.g., 'compromised data'). Here the context is about integrity, not disclosure.",
+        },
+        {
+          id: "D",
+          definition: "renegotiate or redefine",
+          isCorrect: false,
+          elimReason:
+            "'Refusing to compromise' means refusing to weaken principles, not refusing to redefine them. Too specific and misses the core meaning.",
+        },
+      ],
+    },
+  ];
+
+  return (
+    <div className="flex flex-col lg:flex-row min-h-screen">
+      <aside className="w-full lg:w-64 lg:fixed lg:top-14 lg:bottom-0 lg:overflow-y-auto p-4 border-r border-slate-200 bg-slate-50 z-0 hidden lg:block">
+        <nav className="space-y-2 pt-6">
+          <SectionMarker
+            index={0}
+            title="Word Meaning Strategy"
+            icon={BookOpen}
+          />
+          <SectionMarker
+            index={1}
+            title="Context Elimination"
+            icon={AlertTriangle}
+          />
+          <SectionMarker index={2} title="Practice Quiz" icon={Zap} />
+        </nav>
+      </aside>
+
+      <div className="flex-1 lg:ml-64 p-6 md:p-12 max-w-4xl mx-auto">
+        {/* Section 0: Word Meaning Strategy */}
+        <section
+          ref={(el) => {
+            sectionsRef.current[0] = el;
+          }}
+          className="min-h-screen flex flex-col justify-center mb-24 pt-20 lg:pt-0"
+        >
+          <div className="inline-flex items-center gap-2 bg-rose-100 text-rose-700 px-3 py-1 rounded-full text-xs font-bold uppercase tracking-wider mb-4">
+            Vocabulary in Context
+          </div>
+          <h2 className="text-4xl font-extrabold text-slate-900 mb-2">
+            Word Meaning Strategy
+          </h2>
+          <p className="text-lg text-slate-500 mb-8">
+            A word can have many meanings. "Most nearly means" asks which
+            meaning fits THIS sentence. Context, not the dictionary, is the
+            judge.
+          </p>
+
+          <div className="bg-rose-50 border border-rose-200 rounded-2xl p-6 mb-6 space-y-4">
+            <h3 className="text-lg font-bold text-rose-900">
+              Four Essential Rules
+            </h3>
+            <div className="space-y-3">
+              <div className="bg-white rounded-xl p-3 border border-rose-100">
+                <p className="text-xs font-bold text-rose-700 mb-1">
+                  1. 'Most Nearly Means'
+                </p>
+                <p className="text-xs text-slate-600">
+                  This question type asks for the word's meaning IN THIS
+                  CONTEXT, not its general definition. The same word can have
+                  different meanings in different sentences.
+                </p>
+              </div>
+              <div className="bg-white rounded-xl p-3 border border-rose-100">
+                <p className="text-xs font-bold text-rose-700 mb-1">
+                  2. Substitute Test
+                </p>
+                <p className="text-xs text-slate-600">
+                  Insert each answer choice into the sentence in place of the
+                  word. The correct answer will sound natural and preserve the
+                  sentence's meaning.
+                </p>
+              </div>
+              <div className="bg-white rounded-xl p-3 border border-rose-100">
+                <p className="text-xs font-bold text-rose-700 mb-1">
+                  3. Watch for Secondary Meanings
+                </p>
+                <p className="text-xs text-slate-600">
+                  The SAT deliberately picks words that have a common meaning
+                  AND a rarer contextual meaning. The correct answer is usually
+                  the less obvious one.
+                </p>
+              </div>
+              <div className="bg-white rounded-xl p-3 border border-rose-100">
+                <p className="text-xs font-bold text-rose-700 mb-1">
+                  4. Tone and Connotation
+                </p>
+                <p className="text-xs text-slate-600">
+                  Even if a word is technically correct, wrong connotation =
+                  wrong answer. 'Famous' and 'notorious' both mean well-known,
+                  but 'notorious' has negative connotation.
+                </p>
+              </div>
+            </div>
+          </div>
+
+          <div className="space-y-3 mb-6">
+            <div className="bg-rose-100 rounded-xl p-4 border border-rose-200">
+              <p className="text-sm text-slate-800 italic">
+                "The scientist's findings were met with considerable reservation
+                by her peers."
+              </p>
+            </div>
+            <div className="bg-green-100 rounded-xl p-4 border border-green-200">
+              <p className="text-sm text-slate-800">
+                <span className="font-bold text-green-800">
+                  'Reservation' here = doubt/skepticism.
+                </span>{" "}
+                Not a place to stay — context overrides the common meaning.
+              </p>
+            </div>
+            <div className="bg-orange-100 rounded-xl p-4 border border-orange-200">
+              <p className="text-sm text-slate-800">
+                <span className="font-bold text-orange-800">
+                  Wrong choice trap:
+                </span>{" "}
+                'hesitation' — close but 'reservation' implies more sustained
+                doubt, not momentary pause.
+              </p>
+            </div>
+          </div>
+
+          <div className="bg-red-50 border border-red-200 rounded-xl p-4 mb-6">
+            <p className="text-sm font-bold text-red-800 mb-1">
+              The 'most nearly means' trap
+            </p>
+            <p className="text-sm text-slate-700">
+              The SAT picks the most common meaning of the word as a wrong
+              answer choice. Always check if the common meaning fits the
+              sentence — if it feels wrong in context, look for the rarer
+              contextual meaning.
+            </p>
+          </div>
+
+          <div className="bg-rose-900 rounded-2xl p-5 mb-8">
+            <p className="text-sm font-bold text-rose-100 mb-1">Golden Rule</p>
+            <p className="text-sm text-white">
+              The correct answer substitutes naturally into the sentence without
+              changing the author's intended meaning. Test each choice by
+              reading the full sentence aloud.
+            </p>
+          </div>
+
+          <button
+            onClick={() => scrollToSection(1)}
+            className="mt-4 group flex items-center text-rose-600 font-bold hover:text-rose-800 transition-colors"
+          >
+            Next: Context Elimination{" "}
+            <ArrowDown className="ml-2 w-5 h-5 group-hover:translate-y-1 transition-transform" />
+          </button>
+        </section>
+
+        {/* Section 1: Context Elimination */}
+        <section
+          ref={(el) => {
+            sectionsRef.current[1] = el;
+          }}
+          className="min-h-screen flex flex-col justify-center mb-24"
+        >
+          <div className="inline-flex items-center gap-2 bg-rose-100 text-rose-700 px-3 py-1 rounded-full text-xs font-bold uppercase tracking-wider mb-4">
+            Interactive Practice
+          </div>
+          <h2 className="text-4xl font-extrabold text-slate-900 mb-2">
+            Context Elimination
+          </h2>
+          <p className="text-lg text-slate-500 mb-8">
+            For each question below, read the sentence and use context clues to
+            eliminate wrong choices — then select the best meaning.
+          </p>
+
+          <ContextEliminationWidget
+            exercises={VOCAB_EXERCISES}
+            accentColor="rose"
+          />
+
+          <button
+            onClick={() => scrollToSection(2)}
+            className="mt-12 group flex items-center text-rose-600 font-bold hover:text-rose-800 transition-colors"
+          >
+            Next: Practice Quiz{" "}
+            <ArrowDown className="ml-2 w-5 h-5 group-hover:translate-y-1 transition-transform" />
+          </button>
+        </section>
+
+        {/* Section 2: Practice Quiz */}
+        <section
+          ref={(el) => {
+            sectionsRef.current[2] = el;
+          }}
+          className="min-h-screen flex flex-col justify-center mb-24"
+        >
+          <h2 className="text-4xl font-extrabold text-slate-900 mb-6">
+            Practice Quiz
+          </h2>
+          {WORDS_CONTEXT_EASY.slice(2, 4).map((q) => (
+            <PracticeFromDataset key={q.id} question={q} color="fuchsia" />
+          ))}
+          {WORDS_CONTEXT_MEDIUM.slice(1, 2).map((q) => (
+            <PracticeFromDataset key={q.id} question={q} color="fuchsia" />
+          ))}
+          <div className="mt-8 text-center">
+            <button
+              onClick={onFinish}
+              className="px-6 py-3 bg-rose-900 text-white font-bold rounded-full hover:bg-rose-700 transition-colors"
+            >
+              Finish Lesson
+            </button>
+          </div>
+        </section>
+      </div>
+    </div>
+  );
+};
+
+export default EBRWVocabMeaningLesson;