phsl / new-api

Summary
• **en.json**
  – Added translation for “是否自动禁用” → “Whether to automatically disable”.
  – Stubbed/added key for helper text “仅当自动禁用开启时有效，关闭后不会自动禁用该渠道” (translation placeholder left for future update).

Why
These keys were previously untranslated, causing mixed-language UI for the “Auto Disable” toggle in the channel edit form. Filling them (or at least registering the keys) ensures consistent localization and prevents runtime fallbacks.