chore(infra): align systemd units and Forgejo runners

Point services to /opt/innercontext/current release paths, remove stale phase completion docs, and switch Forgejo workflows to run on the lxc runner label.

.forgejo/workflows/ci.yml

@@ -0,0 +1,108 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - main
+      - develop
+  pull_request:
+    branches:
+      - main
+      - develop
+
+jobs:
+  backend-lint:
+    name: Backend Linting & Type Checking
+    runs-on: lxc
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.12'
+
+      - name: Install uv
+        run: |
+          curl -LsSf https://astral.sh/uv/install.sh | sh
+          echo "$HOME/.cargo/bin" >> $GITHUB_PATH
+
+      - name: Install dependencies
+        working-directory: backend
+        run: uv sync
+
+      - name: Run ruff check
+        working-directory: backend
+        run: uv run ruff check .
+
+      - name: Run black check
+        working-directory: backend
+        run: uv run black --check .
+
+      - name: Run isort check
+        working-directory: backend
+        run: uv run isort --check-only .
+
+      - name: Run mypy type checking
+        working-directory: backend
+        run: uv run mypy innercontext/
+        continue-on-error: true  # Don't fail CI on type errors for now
+
+  frontend-check:
+    name: Frontend Type Checking & Linting
+    runs-on: lxc
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+
+      - name: Install pnpm
+        run: npm install -g pnpm
+
+      - name: Install dependencies
+        working-directory: frontend
+        run: pnpm install --frozen-lockfile
+
+      - name: Run svelte-check
+        working-directory: frontend
+        run: pnpm check
+
+      - name: Run lint
+        working-directory: frontend
+        run: pnpm lint
+
+      - name: Build frontend
+        working-directory: frontend
+        run: pnpm build
+
+  backend-test:
+    name: Backend Tests
+    runs-on: lxc
+    # Disabled for now since tests are not integrated yet
+    if: false
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.12'
+
+      - name: Install uv
+        run: |
+          curl -LsSf https://astral.sh/uv/install.sh | sh
+          echo "$HOME/.cargo/bin" >> $GITHUB_PATH
+
+      - name: Install dependencies
+        working-directory: backend
+        run: uv sync
+
+      - name: Run tests
+        working-directory: backend
+        run: uv run pytest

.forgejo/workflows/deploy-manual.yml

@@ -18,7 +18,7 @@ on:
 jobs:
   deploy:
     name: Manual deployment to LXC
-    runs-on: ubuntu-latest
+    runs-on: lxc
     steps:
       - name: Checkout code
         uses: actions/checkout@v4