feat(prompts+i18n): add prompt management and improve prompt editor i18n (#193)

* feat(prompts): add prompt management across Tauri service and React UI

- backend: add commands/prompt.rs, services/prompt.rs, register in commands/mod.rs and lib.rs, refine app_config.rs
- frontend: add PromptPanel, PromptFormModal, PromptListItem, MarkdownEditor, usePromptActions, integrate in App.tsx
- api: add src/lib/api/prompts.ts
- i18n: update src/i18n/locales/{en,zh}.json
- build: update package.json and pnpm-lock.yaml

* feat(i18n): improve i18n for prompts and Markdown editor

- update src/i18n/locales/{en,zh}.json keys and strings
- apply i18n in PromptFormModal, PromptPanel, and MarkdownEditor
- align prompt text with src-tauri/src/services/prompt.rs

* feat(prompts): add enable/disable toggle and simplify panel UI

- Add PromptToggle component and integrate in prompt list items
- Implement toggleEnabled with optimistic update; enable via API, disable via upsert with enabled=false;
  reload after success
- Simplify PromptPanel: remove file import and current-file preview to keep CRUD flow focused
- Tweak header controls style (use mcp variant) and minor copy: rename “Prompt Management” to “Prompts”
- i18n: add disableSuccess/disableFailed messages
- Backend (Tauri): prevent duplicate backups when importing original prompt content

* style: unify code formatting with trailing commas

* feat(prompts): add Gemini filename support to PromptFormModal

Update filename mapping to use Record<AppId, string> pattern, supporting
GEMINI.md alongside CLAUDE.md and AGENTS.md.

* fix(prompts): sync enabled prompt to file when updating

When updating a prompt that is currently enabled, automatically sync
the updated content to the corresponding live file (CLAUDE.md/AGENTS.md/GEMINI.md).

This ensures the active prompt file always reflects the latest content
when editing enabled prompts.

src-tauri/src/app_config.rs

@@ -21,6 +21,24 @@ pub struct McpRoot {
     pub gemini: McpConfig,  // Gemini MCP 配置（预留）
 }
 
+/// Prompt 配置：单客户端维度
+#[derive(Debug, Clone, Serialize, Deserialize, Default)]
+pub struct PromptConfig {
+    #[serde(default)]
+    pub prompts: HashMap<String, crate::prompt::Prompt>,
+}
+
+/// Prompt 根：按客户端分开维护
+#[derive(Debug, Clone, Serialize, Deserialize, Default)]
+pub struct PromptRoot {
+    #[serde(default)]
+    pub claude: PromptConfig,
+    #[serde(default)]
+    pub codex: PromptConfig,
+    #[serde(default)]
+    pub gemini: PromptConfig,
+}
+
 use crate::config::{copy_file, get_app_config_dir, get_app_config_path, write_json_file};
 use crate::error::AppError;
 use crate::provider::ProviderManager;
@@ -73,6 +91,9 @@ pub struct MultiAppConfig {
     /// MCP 配置（按客户端分治）
     #[serde(default)]
     pub mcp: McpRoot,
+    /// Prompt 配置（按客户端分治）
+    #[serde(default)]
+    pub prompts: PromptRoot,
 }
 
 fn default_version() -> u32 {
@@ -90,6 +111,7 @@ impl Default for MultiAppConfig {
             version: 2,
             apps,
             mcp: McpRoot::default(),
+            prompts: PromptRoot::default(),
         }
     }
 }