fix: make setup auto-installs deps and handles container-owned dirs

- Add check-deps target: auto-installs python3, pip3, cryptography via
  apt (with pip fallback) before running setup_cell.py
- Add sudo chown in setup to reclaim config/data dirs if containers have
  taken ownership (e.g. re-running setup after make start)
- Pass PUID/PGID=$(id -u/g) to docker-compose so linuxserver/wireguard
  chowns its config dir to the host user instead of hardcoded UID 911

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

Makefile

@@ -1,7 +1,7 @@
 # Personal Internet Cell - Makefile
 # Provides easy commands for managing the cell
 
-.PHONY: help start stop restart status logs clean setup init-peers build build-api build-webui
+.PHONY: help start stop restart status logs clean setup check-deps init-peers build build-api build-webui
 
 # Detect docker compose command (v2 plugin preferred, fallback to v1 standalone)
 DC := $(shell docker compose version >/dev/null 2>&1 && echo "docker compose" || echo "docker-compose")
@@ -38,8 +38,20 @@ help:
 	@echo "  restore        - Restore from backup"
 
 # Setup commands
-setup:
+check-deps:
+	@echo "Checking system dependencies..."
+	@which python3 >/dev/null 2>&1 || (echo "Installing python3..." && sudo apt-get install -y python3)
+	@which pip3 >/dev/null 2>&1 || (echo "Installing pip3..." && sudo apt-get install -y python3-pip)
+	@python3 -c "import cryptography" 2>/dev/null || \
+		(echo "Installing python3-cryptography..." && \
+		(sudo apt-get install -y python3-cryptography 2>/dev/null || \
+		pip3 install --break-system-packages cryptography 2>/dev/null || \
+		pip3 install cryptography))
+	@echo "Dependencies OK."
+
+setup: check-deps
 	@echo "Setting up Personal Internet Cell..."
+	@sudo chown -R $$(id -u):$$(id -g) config/ data/ 2>/dev/null || true
 	CELL_NAME=$(or $(CELL_NAME),mycell) \
 	CELL_DOMAIN=$(or $(CELL_DOMAIN),cell) \
 	VPN_ADDRESS=$(or $(VPN_ADDRESS),10.0.0.1/24) \
@@ -56,17 +68,17 @@ init-peers:
 # Management commands
 start:
 	@echo "Starting Personal Internet Cell..."
-	$(DC) up -d --build
+	PUID=$$(id -u) PGID=$$(id -g) $(DC) up -d --build
 	@echo "Services started. Check status with 'make status'"
 
 stop:
 	@echo "Stopping Personal Internet Cell..."
-	$(DC) down
+	PUID=$$(id -u) PGID=$$(id -g) $(DC) down
 	@echo "Services stopped."
 
 restart:
 	@echo "Restarting Personal Internet Cell..."
-	$(DC) restart
+	PUID=$$(id -u) PGID=$$(id -g) $(DC) restart
 	@echo "Services restarted."
 
 status: