Initial commit: Triple-C app, container, and CI

Tauri v2 desktop app (React/TypeScript + Rust) for managing
containerized Claude Code environments. Includes Gitea Actions
workflow for building and pushing the sandbox container image,
and a BUILDING.md guide for manual app builds on Linux and Windows.

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

.gitea/workflows/build.yml

@@ -0,0 +1,44 @@
+name: Build Container
+
+on:
+  push:
+    branches: [main]
+    paths:
+      - "container/**"
+  pull_request:
+    branches: [main]
+    paths:
+      - "container/**"
+
+env:
+  REGISTRY: repo.anhonesthost.net
+  IMAGE_NAME: cybercovellc/triple-c/triple-c-sandbox
+
+jobs:
+  build-container:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Login to Gitea Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ gitea.actor }}
+          password: ${{ secrets.REGISTRY_TOKEN }}
+
+      - name: Build and push container image
+        uses: docker/build-push-action@v5
+        with:
+          context: ./container
+          file: ./container/Dockerfile
+          push: ${{ gitea.event_name == 'push' }}
+          tags: |
+            ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:latest
+            ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ gitea.sha }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max