feat: Implement writing streak tracking, add chapter API routes, and introduce a BookSettings component with i18n support.

test-streak.ts

@@ -0,0 +1,41 @@
+import { updateWritingStreak } from './src/lib/streak';
+import { prisma } from './src/lib/prisma';
+
+async function main() {
+    // 1. Get the first user
+    const user = await prisma.user.findFirst();
+    if (!user) {
+        console.log("No user found.");
+        return;
+    }
+
+    console.log(`Original streak for ${user.email}:`, user.writingStreak, "Last write date:", user.lastWriteDate);
+
+    // 2. Simulate setting lastWriteDate to yesterday
+    const yesterday = new Date();
+    yesterday.setDate(yesterday.getDate() - 1);
+
+    await prisma.user.update({
+        where: { id: user.id },
+        data: {
+            lastWriteDate: yesterday,
+            writingStreak: 5 // let's pretend it was 5
+        }
+    });
+
+    console.log("Updated lastWriteDate to yesterday, streak is 5.");
+
+    // 3. Call our function to update the streak (as if they wrote today)
+    console.log("Calling updateWritingStreak...");
+    await updateWritingStreak(user.id);
+
+    // 4. Verify the new values
+    const updatedUser = await prisma.user.findUnique({
+        where: { id: user.id },
+        select: { writingStreak: true, lastWriteDate: true }
+    });
+
+    console.log(`New streak:`, updatedUser?.writingStreak, "Last write date:", updatedUser?.lastWriteDate);
+}
+
+main().catch(console.error);