Initial catalog release for dsh-builtin-toggles.
- Adds a Chinese-first catalog for official DSH Web built-in plugins, with plain-language descriptions and local search.
- Explains capabilities that are managed per session by Agent Presets instead of presenting them as simply disabled.
- Keeps the existing 9-item audited allowlist for safe Web UI toggles; core services, Agent capabilities, and unknown entries remain locked.
- Clarifies that toggles are Web-wide settings and do not modify Agent Presets.
- Adds progressive details for disable impact, recommendations, lock reasons, and status notes.
- Tested with DSH 0.1.0-rc.6.