linter fixes, env fixes

app/api/habits/[id]/log/route.ts

@@ -7,8 +7,8 @@ async function getUserFromToken() {
   const token = await getTokenCookie();
   if (!token) return null;
 
-  const [user] = await db.select().from(users).where(eq(users.token, token));
-  return user;
+  const userRows = await db.select().from(users).where(eq(users.token, token));
+  return userRows.length > 0 ? userRows[0] : null;
 }
 
 export async function POST(request: NextRequest, { params }: { params: Promise<{ id: string }> }) {
@@ -26,20 +26,20 @@ export async function POST(request: NextRequest, { params }: { params: Promise<{
     }
 
     // Verify habit belongs to user
-    const [habit] = await db
+    const habitRows = await db
       .select()
       .from(habits)
       .where(and(eq(habits.id, habitId), eq(habits.userId, user.id)));
 
-    if (!habit) {
+    if (habitRows.length === 0) {
       return NextResponse.json({ error: 'Habit not found' }, { status: 404 });
     }
 
-    const body = await request.json();
+    const body = (await request.json()) as { note?: string };
     const { note } = body;
 
     // Create log entry
-    const [log] = await db
+    const logRows = await db
       .insert(habitLogs)
       .values({
         habitId,
@@ -47,6 +47,11 @@ export async function POST(request: NextRequest, { params }: { params: Promise<{
       })
       .returning();
 
+    if (logRows.length === 0) {
+      throw new Error('Failed to create log entry');
+    }
+
+    const log = logRows[0];
     return NextResponse.json({ log });
   } catch (error) {
     console.error('Log habit error:', error);