milestone 9

HANZI-LEARNING-APP-SPECIFICATION.md

@@ -456,20 +456,54 @@ simplified,traditional,pinyin,meaning,hsk_level,radical,frequency,pos,classifier
   - ✅ 100% statement and line coverage
   - ✅ 94.11% branch coverage (exceeds 90% requirement)
 
-### Week 7-8: Learning Interface
-- Learning session pages
-- Card component
-- Answer submission
-- Feedback UI
-- Session summary
-- Keyboard shortcuts
-- E2E tests
+### Week 7-8: Learning Interface ✅ COMPLETE
+- ✅ Learning session pages
+  - ✅ `/learn/[collectionId]` dynamic route
+  - ✅ Large hanzi display (text-9xl)
+  - ✅ 4 pinyin options in 2x2 grid
+  - ✅ Progress bar with card count
+- ✅ Card component
+  - ✅ Auto-submit after selection
+  - ✅ Green/red feedback overlay
+  - ✅ English meaning display
+- ✅ Answer submission
+  - ✅ `submitAnswer()` Server Action
+  - ✅ SM-2 progress updates
+  - ✅ Session review tracking
+- ✅ Feedback UI
+  - ✅ Correct/incorrect indicators
+  - ✅ Correct answer display
+  - ✅ Vocabulary meaning reinforcement
+- ✅ Session summary
+  - ✅ Total cards, accuracy, duration
+  - ✅ Correct/incorrect breakdown
+- ✅ Keyboard shortcuts
+  - ✅ 1-4 for answer selection
+  - ✅ Space to continue
+- ✅ Learning Server Actions (`src/actions/learning.ts`)
+  - ✅ `startLearningSession()` - Initialize with SM-2 card selection
+  - ✅ `submitAnswer()` - Record and update progress
+  - ✅ `endSession()` - Calculate summary stats
+  - ✅ `getDueCards()` - Count due cards
+  - ✅ `updateCardDifficulty()` - Manual difficulty override
+  - ✅ `removeFromLearning()` - Suspend card
+- ✅ Two-stage card randomization
+  - ✅ Random tiebreaker during selection
+  - ✅ Final shuffle for presentation
+- ✅ Navigation integration
+  - ✅ Dashboard "Start Learning" button
+  - ✅ Collection "Start Learning" button
+- ✅ All 38 SM-2 algorithm tests passing (98.92% coverage)
 
-### Week 9: Dashboard & Progress
-- Dashboard widgets
-- Progress page
-- Charts (Recharts)
-- Statistics calculations
+### Week 9: Dashboard & Progress ✅
+- ✅ Dashboard widgets with real statistics (due cards, total learned, daily goal, streak)
+- ✅ Progress page with charts and session history
+- ✅ Charts (Recharts) - Daily activity bar chart, accuracy trend line chart
+- ✅ Statistics Server Actions (getStatistics, getUserProgress, getLearningSessions, getHanziProgress, resetHanziProgress)
+- ✅ Recent activity section on dashboard
+- ✅ Date range filtering (7/30/90/365 days)
+- ✅ Session history table with complete details
+- ✅ Navigation links to progress page
 
 ### Week 10: UI Polish
 - Responsive layouts