feat(ctsclearing): single-panel signature verification for inward cheques

Adds a rich decide dialog for clerks verifying inward CTS cheques: cheque
images, all automatic validation results, and a mandatory signature-check
gate built from the account's mode of operation and joint holders (backed
by a new SignatoryService reusing the existing signature/document fetch
pattern from the cashier module).

Also adds a fullscreen compare mode: the cheque opens large with a shelf
of every mandatory signer's stored signature, which can be dragged onto
the cheque, resized, made semi-transparent, and zoomed, for a real
side-by-side signature match instead of squinting at a thumbnail.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/environments/.env.ts

@@ -9,8 +9,8 @@
 /* tslint:disable */
 export default {
   'mifos_x': {
-    'version': '260720',
-    'hash': 'ed2a40a8'
+    'version': '260721',
+    'hash': '6d205c0e'
   },
   'allow_switching_backend_instance': true
 };