fix: patch agent registry for local images during kind-up (#857)

## Summary

- When `LOCAL_IMAGES=true`, patches the `ambient-agent-registry`
configmap to use `localhost/` image references instead of
`quay.io/ambient_code/`
- Fixes runner and state-sync pods pulling from Quay instead of using
locally-built images in the kind cluster

## Changes

After `kubectl apply -k components/manifests/overlays/kind-local/`, the
Makefile now runs a `sed` + `kubectl patch` to replace:
- `quay.io/ambient_code/vteam_claude_runner:<tag>` →
`localhost/vteam_claude_runner:latest`
- `quay.io/ambient_code/vteam_state_sync:<tag>` →
`localhost/vteam_state_sync:latest`

## Test plan

- [ ] `make kind-up LOCAL_IMAGES=true` patches the configmap
automatically
- [ ] `kubectl get configmap ambient-agent-registry -n ambient-code -o
jsonpath='{.data}'` shows `localhost/` images
- [ ] New sessions create runner pods using local images

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: Gkrumbach07

Makefile

@@ -677,6 +677,12 @@ kind-up: check-kind check-kubectl ## Start kind cluster (LOCAL_IMAGES=true to bu
 		$(MAKE) --no-print-directory _kind-load-images; \
 		echo "$(COLOR_BLUE)▶$(COLOR_RESET) Deploying with locally-built images..."; \
 		kubectl apply --validate=false -k components/manifests/overlays/kind-local/; \
+		echo "$(COLOR_BLUE)▶$(COLOR_RESET) Patching agent registry for local images..."; \
+		REGISTRY=$$(kubectl get configmap ambient-agent-registry -n $(NAMESPACE) -o jsonpath='{.data.agent-registry\.json}'); \
+		UPDATED=$$(echo "$$REGISTRY" | sed 's|quay.io/ambient_code/vteam_claude_runner:[^"]*|localhost/vteam_claude_runner:latest|g; s|quay.io/ambient_code/vteam_state_sync:[^"]*|localhost/vteam_state_sync:latest|g'); \
+		kubectl patch configmap ambient-agent-registry -n $(NAMESPACE) --type=merge \
+			-p "{\"data\":{\"agent-registry.json\":$$(echo "$$UPDATED" | jq -Rs .)}}"; \
+		echo "$(COLOR_GREEN)✓$(COLOR_RESET) Agent registry patched for local images"; \
 	else \
 		echo "$(COLOR_BLUE)▶$(COLOR_RESET) Deploying with Quay.io images..."; \
 		kubectl apply --validate=false -k components/manifests/overlays/kind/; \