fix: generate en_US.UTF-8 for makensis, C.UTF-8 needs glibc 2.35+

C.UTF-8 is a glibc built-in only from 2.35 (Debian 12+) onward; on an
older Debian runner setlocale() silently falls back to POSIX, which is
exactly the "main argv conversion failed!" crash from before. Install
locales and generate en_US.UTF-8 explicitly instead, which works on any
Debian version.

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

.gitea/workflows/release.yml

@@ -62,7 +62,10 @@ jobs:
         run: |
           sudo dpkg --add-architecture i386
           sudo apt-get update
-          sudo apt-get install -y jq wine
+          sudo apt-get install -y jq wine locales
+          # C.UTF-8 is glibc >=2.35 only (Debian 12+); en_US.UTF-8 works on any
+          # Debian version and just needs generating once.
+          sudo locale-gen en_US.UTF-8
 
       - name: Ensure PowerShell
         # Debian ships no snapd by default, so this pulls Microsoft's portable
@@ -83,12 +86,11 @@ jobs:
         shell: pwsh
         env:
           TAG: ${{ steps.vars.outputs.tag }}
-          # Wine's argv conversion aborts with ERR_ELECTRON_BUILDER_CANNOT_EXECUTE
+          # makensis's argv conversion aborts with ERR_ELECTRON_BUILDER_CANNOT_EXECUTE
           # / "main argv conversion failed!" under the C/POSIX locale that a
-          # minimal Debian box defaults to. C.UTF-8 is a glibc built-in, no
+          # minimal Debian box defaults to. en_US.UTF-8 is generated above.
-          # locale-gen needed.
+          LANG: en_US.UTF-8
-          LANG: C.UTF-8
+          LC_ALL: en_US.UTF-8
-          LC_ALL: C.UTF-8
         run: ./scripts/build-release.ps1 -Targets win,linux-appimage -Tag $env:TAG
 
       - name: Log in to git.azuze.fr