editor: new appointments never inherit the active bucket

The modal's default-bucket logic dropped new cards into the current
real bucket when opened from one. Calendar-created appointments
(body pre-seeded with #termin / #geburtstag) would then land in e.g.
"work" instead of living bucket-less as calendar entries should.
Detect the pre-filled tag on open and force inpBucket empty for
those; regular new cards still inherit the active bucket.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

electron/package.json

@@ -1,6 +1,6 @@
 {
   "name": "hyprcrd",
-  "version": "1.9.16",
+  "version": "1.9.17",
   "description": "hyprcrd — self-hosted card manager",
   "main": "main.js",
   "scripts": {