fix(org-import): use ws.FilesDir as persona-dir lookup, add docker-cli-buildx to dev image

## org_import.go — persona env injection root-cause fix

The Phase-3 fix from earlier today (`feedback/per-agent-gitea-identity-default`)
introduced loadPersonaEnvFile to inject persona-specific creds into
workspace_secrets on /org/import. It passed `ws.Role` as the persona-dir
lookup key, but in our dev-tree org.yaml shape `role:` carries the
multi-line descriptive text the agent reads from its prompt
("Engineering planning and team coordination — leads Core Platform,
Controlplane, ..."), while `files_dir:` holds the short slug
(`core-lead`, `dev-lead`, etc.) matching
`~/.molecule-ai/personas/<files_dir>/env`.

isSafeRoleName silently rejected the multi-word role text → no persona
env loaded → every imported workspace booted with zero
workspace_secrets rows → no ANTHROPIC / CLAUDE_CODE / MINIMAX auth in
the container env → claude_agent_sdk wedged on `query.initialize()`
with a 60s control-request timeout.

After the fix, /org/import on the dev tree (27 personas) populates
8 workspace_secrets per workspace (Gitea identity + MODEL/MODEL_PROVIDER
+ provider-specific token), 5 of 6 leads boot online, and the
remaining wedges trace to a separate runtime-template-repo bug
(workspace-template-claude-code's claude_sdk_executor.py doesn't
dispatch on MODEL_PROVIDER=minimax — filed separately).

## Dockerfile.dev — docker-cli + docker-cli-buildx

Without these, every claude-code/tier-2 workspace POST fails-fast:
- docker-cli alone produces `exec: "docker": executable file not found`
- docker-cli alone (no buildx) fails on `docker build` with
  `ERROR: BuildKit is enabled but the buildx component is missing or broken`

Both packages are now installed in the dev image; verified with
`docker exec molecule-core-platform-1 docker buildx version`.

## Stage A verified

Local /org/import dev-only path: 27 workspaces created, all 27 receive
persona env injection (8 secrets each — Gitea identity + provider creds).
Lead workspaces (claude-code-OAuth tier) boot online.

## Stage B — N/A

Local-dev-only path (docker-compose.dev.yml + dev image). Tenant EC2
provisioning uses Dockerfile.tenant (untouched).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

workspace-server/Dockerfile.dev

@@ -15,8 +15,14 @@
 
 FROM golang:1.25-alpine
 
-# air + git (for go mod) + ca-certs (for TLS) + tzdata (for time-zone DB).
-RUN apk add --no-cache git ca-certificates tzdata wget \
+# air + git (for go mod) + ca-certs (for TLS) + tzdata (for time-zone DB)
+# + docker-cli + docker-cli-buildx so the platform binary can shell out to
+# /var/run/docker.sock (bind-mounted from host) for local-build provisioning.
+# docker-cli alone is insufficient: alpine's docker-cli enables BuildKit by
+# default but ships without buildx, producing
+# `ERROR: BuildKit is enabled but the buildx component is missing or broken`
+# on every `docker build`. docker-cli-buildx provides the buildx subcommand.
+RUN apk add --no-cache git ca-certificates tzdata wget docker-cli docker-cli-buildx \
  && go install github.com/air-verse/air@latest
 
 WORKDIR /app/workspace-server

workspace-server/internal/handlers/org_import.go

@@ -453,8 +453,25 @@ func (h *OrgHandler) createWorkspaceTree(ws OrgWorkspace, parentID *string, absX
 		envVars := map[string]string{}
 		// 0. Persona env (lowest precedence; injects the role's Gitea identity:
 		//    GITEA_USER, GITEA_TOKEN, GITEA_TOKEN_SCOPES, GITEA_USER_EMAIL,
-		//    GITEA_SSH_KEY_PATH). Workspace and org .env can override.
-		loadPersonaEnvFile(ws.Role, envVars)
+		//    GITEA_SSH_KEY_PATH, plus MODEL_PROVIDER/MODEL and the LLM auth
+		//    token like CLAUDE_CODE_OAUTH_TOKEN or MINIMAX_API_KEY).
+		//    Workspace and org .env can override.
+		//
+		// Use ws.FilesDir as the persona-dir lookup key, NOT ws.Role. In the
+		// dev-tree org.yaml shape, `role:` carries the multi-line descriptive
+		// text the agent reads from its prompt ("Engineering planning and
+		// team coordination — leads Core Platform, Controlplane, ..."), while
+		// `files_dir:` holds the short slug (`core-lead`, `dev-lead`, etc.)
+		// matching `~/.molecule-ai/personas/<files_dir>/env`
+		// (bind-mounted to `/etc/molecule-bootstrap/personas/<files_dir>/env`).
+		//
+		// Pre-fix, this passed `ws.Role` whose multi-word content failed
+		// isSafeRoleName silently, so every imported workspace booted with
+		// zero persona-env rows in workspace_secrets — no ANTHROPIC /
+		// CLAUDE_CODE auth in the container env. The claude_agent_sdk
+		// then wedged on `query.initialize()` with a 60s control-request
+		// timeout (caught 2026-05-08 right after dev-only org/import).
+		loadPersonaEnvFile(ws.FilesDir, envVars)
 		if orgBaseDir != "" {
 			// 1. Org root .env (shared defaults)
 			parseEnvFile(filepath.Join(orgBaseDir, ".env"), envVars)