feat(notes): rich-text editor with tiptap (task 85)

Replace plain textarea with shared tiptap editor and sanitized html rendering.

Adds interactive checklists on read surfaces and mobile overflow fixes.

src/app/api/uploads/route.ts

@@ -32,6 +32,9 @@ export async function POST(request: Request) {
     return NextResponse.json({ error: "No file field in request" }, { status: 400 });
   }
 
+  const url = new URL(request.url);
+  const scope = url.searchParams.get("scope") === "notes" ? "notes" : "garden";
+
   if (!file.type.startsWith("image/")) {
     return NextResponse.json({ error: "Only image files are allowed" }, { status: 415 });
   }
@@ -45,7 +48,7 @@ export async function POST(request: Request) {
     .replace(/[^a-z0-9]/gi, "")
     .toLowerCase()
     .slice(0, 8);
-  const key = `garden/${session.household.id}/${randomUUID()}.${safeExt}`;
+  const key = `${scope}/${session.household.id}/${randomUUID()}.${safeExt}`;
 
   try {
     await ensureBucket();