Add multiple entries per day, user management, reminders, and AI reflections

- Multiple entries per day: Home page now starts fresh, Save & New button
- Admin user management: Add/delete users, reset passwords, toggle admin
- Daily reminders: Browser notifications at configurable time
- AI reflections: Generate insights from entries using Claude API
- Remove cloud sync placeholder (already have user accounts)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/app/api/settings/route.ts

@@ -0,0 +1,77 @@
+import { NextRequest, NextResponse } from "next/server";
+import { db, schema } from "@/lib/db";
+import { getSession } from "@/lib/auth";
+import { eq } from "drizzle-orm";
+
+// GET /api/settings - Get current user settings
+export async function GET() {
+  const user = await getSession();
+  if (!user) {
+    return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
+  }
+
+  try {
+    const users = await db
+      .select({
+        reminderEnabled: schema.users.reminderEnabled,
+        reminderTime: schema.users.reminderTime,
+        hasLlmKey: schema.users.llmApiKey,
+      })
+      .from(schema.users)
+      .where(eq(schema.users.id, user.id))
+      .limit(1);
+
+    if (users.length === 0) {
+      return NextResponse.json({ error: "User not found" }, { status: 404 });
+    }
+
+    return NextResponse.json({
+      reminderEnabled: users[0].reminderEnabled === 1,
+      reminderTime: users[0].reminderTime || "20:00",
+      hasLlmKey: Boolean(users[0].hasLlmKey),
+    });
+  } catch (error) {
+    console.error("Failed to fetch settings:", error);
+    return NextResponse.json({ error: "Failed to fetch settings" }, { status: 500 });
+  }
+}
+
+// PATCH /api/settings - Update user settings
+export async function PATCH(request: NextRequest) {
+  const user = await getSession();
+  if (!user) {
+    return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
+  }
+
+  try {
+    const body = await request.json();
+    const updates: Record<string, unknown> = {};
+
+    if (typeof body.reminderEnabled === "boolean") {
+      updates.reminderEnabled = body.reminderEnabled ? 1 : 0;
+    }
+
+    if (typeof body.reminderTime === "string") {
+      updates.reminderTime = body.reminderTime;
+    }
+
+    if (typeof body.llmApiKey === "string") {
+      // Store the API key (in production, encrypt this)
+      updates.llmApiKey = body.llmApiKey || null;
+    }
+
+    if (Object.keys(updates).length === 0) {
+      return NextResponse.json({ error: "No updates provided" }, { status: 400 });
+    }
+
+    await db
+      .update(schema.users)
+      .set(updates)
+      .where(eq(schema.users.id, user.id));
+
+    return NextResponse.json({ success: true });
+  } catch (error) {
+    console.error("Failed to update settings:", error);
+    return NextResponse.json({ error: "Failed to update settings" }, { status: 500 });
+  }
+}