Replace Python devcontainer feature with uv-managed Python

Switch from ghcr.io/devcontainers/features/python:1 (compiles from source,
slow) to uv python install 3.13 --default (binary download, fast).

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Dockerfile

@@ -63,6 +63,10 @@ USER vscode
 # Install Claude Code natively
 RUN curl -fsSL https://claude.ai/install.sh | bash
 
+# Install Python 3.13 via uv (fast binary download, not source compilation)
+RUN uv python install 3.13 --default
+ENV PATH="/home/vscode/.local/bin:$PATH"
+
 # Install Oh My Zsh
 ARG ZSH_IN_DOCKER_VERSION=1.2.1
 RUN sh -c "$(curl -fsSL https://github.com/deluan/zsh-in-docker/releases/download/v${ZSH_IN_DOCKER_VERSION}/zsh-in-docker.sh)" -- \

devcontainer.json

@@ -10,9 +10,6 @@
     }
   },
   "features": {
-    "ghcr.io/devcontainers/features/python:1": {
-      "version": "3.13"
-    },
     "ghcr.io/devcontainers/features/github-cli:1": {},
     "ghcr.io/devcontainers/features/node:1": {
       "version": "22"