feat: add Leren page for AI-generated learning modules and update Caddyfile configuration for static routing

Caddyfile

@@ -1,7 +1,4 @@
 :80 {
-    root * /srv
-    file_server
-
     encode gzip zstd
 
     header {
@@ -13,6 +10,16 @@
         Permissions-Policy "geolocation=(), microphone=(), camera=()"
     }
 
+    handle /api/anthropic/* {
+        uri strip_prefix /api/anthropic
+        reverse_proxy https://api.anthropic.com {
+            header_up Host api.anthropic.com
+        }
+    }
+
+    handle {
+        root * /srv
+
         @static {
             path *.css *.js *.png *.jpg *.jpeg *.gif *.webp *.svg *.woff *.woff2 *.ttf
         }
@@ -23,14 +30,9 @@
         }
         header @html Cache-Control "public, max-age=0, must-revalidate"
 
-    handle /api/anthropic/* {
-        uri strip_prefix /api/anthropic
-        reverse_proxy https://api.anthropic.com {
-            header_up Host api.anthropic.com
-        }
-    }
-
         try_files {path} /index.html
+        file_server
+    }
 
     handle_errors {
         rewrite * /index.html

src/pages/Leren.jsx

@@ -1,5 +1,5 @@
 import React, { useState, useEffect } from 'react';
-import { BookOpen, CheckCircle, Loader, ArrowRight, Plus, Search, ChevronLeft } from 'lucide-react';
+import { BookOpen, CheckCircle, Loader, ArrowRight, Plus, Search, ChevronLeft, MessageSquare } from 'lucide-react';
 import { motion, AnimatePresence } from 'framer-motion';
 import { Link } from 'react-router-dom';
 import Card from '../components/ui/Card';
@@ -32,6 +32,11 @@ const Leren = () => {
   const [weeklyDone, setWeeklyDone] = useState(false);
   const [sessionDone, setSessionDone] = useState(false);
 
+  // Feedback
+  const [showFeedbackModal, setShowFeedbackModal] = useState(false);
+  const [feedbackText, setFeedbackText] = useState('');
+  const [feedbackPrompted, setFeedbackPrompted] = useState(false);
+
   useEffect(() => {
     if (state.currentUser) {
       const assigned = getAssignedTopic(state.currentUser.id, state.weekNumber);
@@ -48,6 +53,8 @@ const Leren = () => {
     setView('detail');
     setSessionDone(false);
     setError(null);
+    setFeedbackText('');
+    setFeedbackPrompted(false);
     const cached = getCachedContent(topic.id);
     if (cached) {
       setContent(cached);
@@ -90,7 +97,7 @@ const Leren = () => {
     }
   };
 
-  const handleComplete = () => {
+  const doComplete = () => {
     setSessionDone(true);
     if (!weeklyDone) {
       setWeeklyDone(true);
@@ -98,6 +105,33 @@ const Leren = () => {
     }
   };
 
+  const handleComplete = () => {
+    if (!feedbackPrompted) {
+      setFeedbackPrompted(true);
+      setShowFeedbackModal(true);
+      return;
+    }
+    doComplete();
+  };
+
+  const handleSubmitFeedback = () => {
+    if (feedbackText.trim()) {
+      storage.set(`user:${state.currentUser.id}:feedback:${activeTopic.id}`, {
+        text: feedbackText.trim(),
+        topicId: activeTopic.id,
+        week: state.weekNumber,
+        timestamp: Date.now(),
+      });
+    }
+    setShowFeedbackModal(false);
+    doComplete();
+  };
+
+  const handleSkipFeedback = () => {
+    setShowFeedbackModal(false);
+    doComplete();
+  };
+
   // ── Detail View ──────────────────────────────────────────
   if (view === 'detail' && activeTopic) {
     if (sessionDone) {
@@ -123,6 +157,50 @@ const Leren = () => {
 
     return (
       <div className="p-4 md:p-8 max-w-4xl mx-auto pb-24 md:pb-8">
+        <AnimatePresence>
+          {showFeedbackModal && (
+            <motion.div
+              initial={{ opacity: 0 }}
+              animate={{ opacity: 1 }}
+              exit={{ opacity: 0 }}
+              className="fixed inset-0 z-50 flex items-center justify-center p-4"
+              style={{ backgroundColor: 'rgba(0,0,0,0.5)' }}
+            >
+              <motion.div
+                initial={{ scale: 0.95, opacity: 0, y: 16 }}
+                animate={{ scale: 1, opacity: 1, y: 0 }}
+                exit={{ scale: 0.95, opacity: 0, y: 16 }}
+                transition={{ type: 'spring', stiffness: 300, damping: 24 }}
+                className="w-full max-w-lg"
+              >
+                <Card className="border border-bg-warm shadow-xl">
+                  <div className="flex items-center gap-3 mb-2">
+                    <div className="w-10 h-10 rounded-full bg-teal/10 flex items-center justify-center flex-shrink-0">
+                      <MessageSquare size={20} className="text-teal" />
+                    </div>
+                    <h2 className="text-xl font-bold">How was this content?</h2>
+                  </div>
+                  <p className="text-fg-muted text-sm mb-5">
+                    Your feedback helps improve future learning content. This is optional — you can skip if you prefer.
+                  </p>
+                  <textarea
+                    autoFocus
+                    value={feedbackText}
+                    onChange={e => setFeedbackText(e.target.value)}
+                    placeholder="What was clear? What could be improved? Anything missing?"
+                    rows={4}
+                    className="w-full rounded-[var(--r-sm)] border border-bg-warm bg-bg p-3 text-sm resize-none focus:outline-none focus:border-teal transition-colors"
+                  />
+                  <div className="flex justify-end gap-3 mt-4">
+                    <Button variant="outline" onClick={handleSkipFeedback}>Skip</Button>
+                    <Button onClick={handleSubmitFeedback}>Submit Feedback</Button>
+                  </div>
+                </Card>
+              </motion.div>
+            </motion.div>
+          )}
+        </AnimatePresence>
+
         <button onClick={() => setView('overview')} className="flex items-center gap-2 text-fg-muted hover:text-teal mb-6 transition-colors">
           <ChevronLeft size={16} /> Back to overview
         </button>