feat(usage): improve custom template system with variable hints and validation fixes (#628)

* feat(usage): improve custom template with variables display and explicit type detection

Combine two feature improvements:
1. Display supported variables ({{baseUrl}}, {{apiKey}}) with actual values in custom template mode
2. Add explicit templateType field for accurate template mode detection

## Changes

### Frontend
- Display template variables with actual values extracted from provider settings
- Add templateType field to UsageScript for explicit mode detection
- Support template mode persistence across sessions

### Backend
- Add template_type field to UsageScript struct
- Improve validation logic based on explicit template type
- Maintain backward compatibility with type inference

### I18n
- Add "Supported Variables" section translation (zh/en/ja)

### Benefits
- More accurate template mode detection (no more guessing)
- Better user experience with variable hints
- Clearer validation rules per template type

* fix(usage): resolve custom template cache and validation issues

Combine three bug fixes to make custom template mode work correctly:

1. **Update cache after test**: Testing usage script successfully now updates the main list cache immediately
2. **Fix same-origin check**: Custom template mode can now access different domains (SSRF protection still active)
3. **Fix field naming**: Unified to use autoQueryInterval consistently between frontend and backend

## Problems Solved

- Main provider list showing "Query failed" after successful test
- Custom templates blocked by overly strict same-origin validation
- Auto-query intervals not saved correctly due to inconsistent naming

## Changes

### Frontend (UsageScriptModal)
- Import useQueryClient and update cache after successful test
- Invalidate usage cache when saving script configuration
- Use standardized autoQueryInterval field name

### Backend (usage_script.rs)
- Allow custom template mode to bypass same-origin checks
- Maintain SSRF protection for all modes

### Hooks (useProviderActions)
- Invalidate usage query cache when saving script

## Impact

Users can now use custom templates freely while security validations remain intact for general templates.

* fix(usage): correct provider credential field names

- Claude: support both ANTHROPIC_API_KEY and ANTHROPIC_AUTH_TOKEN
- Gemini: use GEMINI_API_KEY instead of GOOGLE_GEMINI_API_KEY
- Codex: use OPENAI_API_KEY and parse base_url from TOML config string

Addresses review feedback from PR #628

* style: format code

---------

Co-authored-by: Jason <farion1231@gmail.com>

src-tauri/src/services/provider/mod.rs

@@ -615,6 +615,7 @@ impl ProviderService {
         base_url: Option<&str>,
         access_token: Option<&str>,
         user_id: Option<&str>,
+        template_type: Option<&str>,
     ) -> Result<UsageResult, AppError> {
         usage::test_usage_script(
             state,
@@ -626,6 +627,7 @@ impl ProviderService {
             base_url,
             access_token,
             user_id,
+            template_type,
         )
         .await
     }

src-tauri/src/services/provider/usage.rs

@@ -17,6 +17,7 @@ pub(crate) async fn execute_and_format_usage_result(
     timeout: u64,
     access_token: Option<&str>,
     user_id: Option<&str>,
+    template_type: Option<&str>,
 ) -> Result<UsageResult, AppError> {
     match usage_script::execute_usage_script(
         script_code,
@@ -25,6 +26,7 @@ pub(crate) async fn execute_and_format_usage_result(
         timeout,
         access_token,
         user_id,
+        template_type,
     )
     .await
     {
@@ -113,7 +115,7 @@ pub async fn query_usage(
     app_type: AppType,
     provider_id: &str,
 ) -> Result<UsageResult, AppError> {
-    let (script_code, timeout, api_key, base_url, access_token, user_id) = {
+    let (script_code, timeout, api_key, base_url, access_token, user_id, template_type) = {
         let providers = state.db.get_all_providers(app_type.as_str())?;
         let provider = providers.get(provider_id).ok_or_else(|| {
             AppError::localized(
@@ -164,6 +166,7 @@ pub async fn query_usage(
             base_url,
             usage_script.access_token.clone(),
             usage_script.user_id.clone(),
+            usage_script.template_type.clone(),
         )
     };
 
@@ -174,6 +177,7 @@ pub async fn query_usage(
         timeout,
         access_token.as_deref(),
         user_id.as_deref(),
+        template_type.as_deref(),
     )
     .await
 }
@@ -190,6 +194,7 @@ pub async fn test_usage_script(
     base_url: Option<&str>,
     access_token: Option<&str>,
     user_id: Option<&str>,
+    template_type: Option<&str>,
 ) -> Result<UsageResult, AppError> {
     // Use provided credential parameters directly for testing
     execute_and_format_usage_result(
@@ -199,6 +204,7 @@ pub async fn test_usage_script(
         timeout,
         access_token,
         user_id,
+        template_type,
     )
     .await
 }