fix: resolve all 6 prefer-const eslint errors for CI

memento-note/app/api/brainstorm/[sessionId]/expand/route.ts

@@ -41,7 +41,7 @@ async function getParentContext(
     include: { note: { select: { id: true, title: true, content: true } } },
   })
 
-  let noteIds = refs.map(r => r.noteId).filter(Boolean) as string[]
+  const noteIds = refs.map(r => r.noteId).filter(Boolean) as string[]
 
   const notes: ParentNoteRef[] = refs.map(r => ({
     noteId: r.noteId,

memento-note/app/api/chat/route.ts

@@ -306,7 +306,7 @@ Tu as accès à : note_search, note_read, document_search, task_extract, web_sea
   const contextBlock = contextNotes.length > 0 ? prompts.contextWithNotes : prompts.contextNoNotes
 
   // Load note images for vision
-  let imageContextParts: Array<{ type: 'image'; image: string }> = []
+  const imageContextParts: Array<{ type: 'image'; image: string }> = []
   if (noteContext?.images && noteContext.images.length > 0) {
     for (const imgPath of noteContext.images.slice(0, 4)) {
       try {

memento-note/app/api/notes/route.ts

@@ -20,7 +20,7 @@ export async function GET(request: NextRequest) {
     const notebookId = searchParams.get('notebookId')
     const limit = searchParams.get('limit') ? parseInt(searchParams.get('limit')!) : undefined
 
-    let where: any = {
+    const where: any = {
       userId: session.user.id,
       trashedAt: null
     }