refactor : migrate VERSION file to config/version.yaml

Same versioning system as SIRH/Lesstime. Updates nuxt.config.ts,
Dockerfile, deploy.sh, auto-tag CI, and release script.

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

.gitea/workflows/auto-tag-develop.yml

@@ -16,7 +16,7 @@ jobs:
           token: ${{ secrets.REGISTRY_TOKEN }}
           persist-credentials: true
 
-      - name: Create next tag from VERSION
+      - name: Create next tag from config/version.yaml
         shell: bash
         run: |
           set -euo pipefail
@@ -28,18 +28,18 @@ jobs:
           fi
 
           changed_version=false
-          if git diff --name-only "${{ gitea.event.before }}" "${{ gitea.event.after }}" | grep -q '^VERSION$'; then
+          if git diff --name-only "${{ gitea.event.before }}" "${{ gitea.event.after }}" | grep -q '^config/version\.yaml$'; then
             changed_version=true
           fi
 
           read_version() {
-            cat VERSION | tr -d '[:space:]'
+            awk -F': *' '/app\.version:/{print $2}' config/version.yaml | tr -d '[:space:]' | tr -d "'\""
           }
 
           if $changed_version; then
             version="$(read_version)"
             if ! [[ "$version" =~ ^[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
-              echo "Invalid version in VERSION: $version" >&2
+              echo "Invalid version in version.yaml: $version" >&2
               exit 1
             fi
           else
@@ -52,10 +52,10 @@ jobs:
               version="${major}.${minor}.$((patch + 1))"
             fi
 
-            echo "$version" > VERSION
+            printf "parameters:\\n    app.version: '%s'\\n" "$version" > config/version.yaml
             git config user.name "gitea-actions"
             git config user.email "gitea-actions@local"
-            git add VERSION
+            git add config/version.yaml
             git commit -m "chore : bump version to v$version" || true
             git push origin develop || true
           fi