Input0 v0.4.0

Bug Fixes

• tighten optimize_text_with_options visibility to pub(crate)
• clean up debounce timer on unmount and i18n the modal labels
• preview_custom_prompt mirrors actual runtime path by toggle state

Code Refactoring

• cache template regex and dedupe history limit constant
• tighten OptimizeOptions visibility and document semantics
• align default custom-prompt template with production prompt

Features

• 更新系统提示生成逻辑，支持中英文动态生成及优化提示词
• add custom_prompt_enabled and custom_prompt fields
• add template engine for custom prompt placeholders
• add safety footer and custom-prompt branch in build_system_prompt
• add optimize_text_with_options for custom-prompt and clipboard
• wire custom prompt and clipboard into optimize_text path
• add get_default_prompt_template and preview_custom_prompt
• sync custom_prompt_enabled and custom_prompt to settings store
• add custom prompt strings (zh + en)
• add CustomPromptPanel with toggle, tag chips, textarea, preview
• wire Custom tab into SettingsPage
• show default prompt with placeholders in custom editor
• expose all six placeholders in default custom prompt template
• v3 — pluggable structuring module + custom-path parity

Styling

• align custom prompt strings to 4-space indent