v0.2.8: fix 415 on argument-less tRPC mutations

tRPC v11 requires Content-Type: application/json on every mutation,
even ones with no input. Our client skipped the header + body when
input was undefined, so app_update_download / app_update_check /
close_quit / etc. all hit UNSUPPORTED_MEDIA_TYPE before reaching the
procedure. Always send the header and a `{}` body on POST.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: beautyfree

package.json

@@ -1,6 +1,6 @@
 {
   "name": "skiller",
-  "version": "0.2.7",
+  "version": "0.2.8",
   "description": "A desktop app for managing AI agent skills across Claude Code, Cursor, Copilot, Gemini CLI, and more",
   "license": "MIT",
   "author": {

src/mainview/lib/native.ts

@@ -203,9 +203,12 @@ async function callTrpcProcedure<T>(
     if (input !== undefined) {
       url += `?input=${encodeURIComponent(JSON.stringify(input))}`
     }
-  } else if (input !== undefined) {
+  } else {
+    // tRPC v11 requires Content-Type: application/json on every mutation,
+    // even ones with no input (it rejects the body-less POST with 415
+    // UNSUPPORTED_MEDIA_TYPE before reaching the procedure).
     init.headers = { 'Content-Type': 'application/json' }
-    init.body = JSON.stringify(input)
+    init.body = input === undefined ? '{}' : JSON.stringify(input)
   }
   const res = await trpcFetch(url, init)
   const payload = (await res.json()) as TrpcSingleResponse<T>