Drop target rel path field from script upload

Every T5 script lands in the flat sp/ directory, so the target path is
always just the uploaded filename. Removed the field from the Scripts
upload form and the server derives targetRelPath from file.name.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/routes/api/scripts/+server.ts

@@ -44,12 +44,13 @@ export async function GET() {
 }
 
 // Multipart POST — creates a script + version 1 from a single file upload.
-// Fields: name (text), targetRelPath (text), scopeType (optional: 'game'|'map'),
-// scopeValue (optional string), notes (optional), content (file).
+// Fields: name (text), scopeType (optional: 'game'|'map'), scopeValue
+// (optional string), notes (optional), content (file). The target rel path
+// defaults to the uploaded filename — T5 servers keep all scripts in a flat
+// sp/ directory, so there's no sub-path to specify.
 export async function POST({ request }: { request: Request }) {
     const form = await request.formData();
     const name = String(form.get('name') ?? '').trim();
-    const targetRelPath = String(form.get('targetRelPath') ?? '').trim();
     const notes = form.get('notes') ? String(form.get('notes')) : undefined;
     let scopeType: ScopeType | null;
     try {
@@ -62,6 +63,7 @@ export async function POST({ request }: { request: Request }) {
     const file = form.get('content');
     if (!(file instanceof File)) return json({ ok: false, error: 'content file is required' }, { status: 400 });
 
+    const targetRelPath = file.name;
     const content = Buffer.from(await file.arrayBuffer());
 
     try {