chore: bump version to 1.3.12

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: jiaweing

apps/desktop/package.json

@@ -1,7 +1,7 @@
 {
   "name": "desktop",
   "private": true,
-  "version": "1.3.11",
+  "version": "1.3.12",
   "type": "module",
   "scripts": {
     "dev": "tauri dev -- --features bria",

apps/desktop/src-tauri/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "backstage"
-version = "1.3.11"
+version = "1.3.12"
 description = "YouTube Thumbnail Studio"
 authors = ["you"]
 edition = "2021"

apps/desktop/src-tauri/tauri.conf.json

@@ -1,7 +1,7 @@
 {
   "$schema": "https://schema.tauri.app/config/2",
   "productName": "Backstage",
-  "version": "1.3.11",
+  "version": "1.3.12",
   "identifier": "com.backstage.desktop",
   "build": {
     "frontendDist": "../dist",