Refactor configuration management: migrate to per-user storage, update encryption handling, and enhance versioning in CI

.github/workflows/build-release.yml

@@ -31,6 +31,21 @@ jobs:
           python -m pip install -r requirements.txt
           python -m pip install pyinstaller
 
+      - name: Stamp version (dev builds)
+        if: startsWith(github.ref, 'refs/heads/')
+        shell: pwsh
+        run: |
+          $sha = "${{ github.sha }}".Substring(0,7)
+          Set-Content -Path version.py -Value "__version__ = `"0.0.0.dev0+$sha`"`n" -Encoding utf8
+
+      - name: Stamp version (tag builds)
+        if: startsWith(github.ref, 'refs/tags/v')
+        shell: pwsh
+        run: |
+          $tag = "${{ github.ref_name }}"
+          $ver = ($tag -replace '^v','')
+          Set-Content -Path version.py -Value "__version__ = `"$ver`"`n" -Encoding utf8
+
       - name: Build (PyInstaller spec)
         shell: pwsh
         run: |