Add API tokens, CLI server API and shared core crate

- Personal API tokens (full/read scope, expiry, revoke) and CLI password login
- Cargo workspace: codecraft-core (types, providers, permission rules) shared by
  server and the upcoming terminal client; server re-exports the old paths
- CLI server API: /cli/config, /cli/skill, /cli/tool (server MCP tools),
  /llm/stream model gateway with budgets and usage per user
- Theme/language preferences mirrored to the server; personal memory endpoint
- Statistics: provider and mode tables stacked; CLI usage labelled
- cli/: work in progress (terminal client is being rewritten as a local TUI)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

server/src/images.rs

@@ -161,6 +161,7 @@ pub async fn generate(app: &App, req: GenerateRequest) -> Result<Vec<ImageRecord
         duration_ms: 0,
         cost,
         error: false,
+        user_id: None,
     });
     Ok(records)
 }