Adopt @lavamoat/allow-scripts to gate npm install scripts

Disables dependency lifecycle scripts by default via .npmrc
(ignore-scripts=true) so arbitrary packages cannot execute code at
install time. An explicit allowlist in web/package.json opts specific
packages back in, and CI/Docker/Taskfile now run allow-scripts after
npm install to apply it.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

.gitea/workflows/ci.yml

@@ -36,7 +36,7 @@ jobs:
 
       - name: Install dependencies
         working-directory: web
-        run: npm install
+        run: npm install && npm exec -- allow-scripts
 
       - name: Type check
         working-directory: web