feat(miniapp): add LoopX console

[xielixing]

Summary

• add a built-in LoopX console MiniApp for global goal, gate, todo, channel, and review-packet visibility
• expose read-only workspace context to MiniApps and gate execution to the matching local workspace
• route goal creation and bounded continuation through the existing Agent Bridge while keeping LoopX as the control-plane source of truth
• preserve cached summaries on refresh errors and keep remote workspaces read-only

Security and compatibility

• allow only the loopx shell executable
• keep Node, filesystem, and external network access disabled
• validate supported LoopX JSON schemas and reject incompatible payloads
• do not add ACP, serve-status, direct --execute, or .loopx file writes
• force UTF-8 for captured Python CLI output on Windows

Verification

• cargo test -p bitfun-product-domains --features miniapp --test miniapp_contracts
• pnpm run type-check:web
• pnpm --dir src/web-ui run test:run src/app/scenes/miniapps/utils/buildMiniAppWorkspaceInfo.test.ts
• node --check src/crates/contracts/product-domains/src/miniapp/builtin/assets/loopx-console/ui.js
• pnpm run fmt:rs
• desktop dev verification with live LoopX registry, summary, and review-packet data