Feat/provider icon color (#385)

* feat(ui): add color prop support to ProviderIcon component

* feat(health): add stream check core functionality

Add new stream-based health check module to replace model_test:
- Add stream_check command layer with single and batch provider checks
- Add stream_check DAO layer for config and log persistence
- Add stream_check service layer with retry mechanism and health status evaluation
- Add frontend HealthStatusIndicator component
- Add frontend useStreamCheck hook

This provides more comprehensive health checking capabilities.

* refactor(health): replace model_test with stream_check

Replace model_test module with stream_check across the codebase:
- Remove model_test command and service modules
- Update command registry in lib.rs to use stream_check commands
- Update module exports in commands/mod.rs and services/mod.rs
- Remove frontend useModelTest hook
- Update stream_check command implementation

This refactoring provides clearer naming and better separation of concerns.

* refactor(db): clean up unused database tables and optimize schema

Remove deprecated and unused database tables:
- Remove proxy_usage table (replaced by proxy_request_logs)
- Remove usage_daily_stats table (aggregation done on-the-fly)
- Rename model_test_logs to stream_check_logs with updated schema
- Remove related DAO methods for proxy_usage
- Update usage_stats service to use proxy_request_logs only
- Refactor usage_script to work with new schema

This simplifies the database schema and removes redundant data storage.

* refactor(ui): update frontend components for stream check

Update frontend components to use stream check API:
- Refactor ModelTestConfigPanel to use stream check config
- Update API layer to use stream_check commands
- Add HealthStatus type and StreamCheckResult interface
- Update ProviderList to use new health check integration
- Update AutoFailoverConfigPanel with stream check references
- Improve UI layout and configuration options

This completes the frontend migration from model_test to stream_check.

* feat(health): add configurable test models and reasoning effort support

Enhance stream check service with configurable test models:
- Add claude_model, codex_model, gemini_model to StreamCheckConfig
- Support reasoning effort syntax (model@level or model#level)
- Parse and apply reasoning_effort for OpenAI-compatible models
- Remove hardcoded model names from check functions
- Add unit tests for model parsing logic
- Remove obsolete model_test source files

This allows users to customize which models are used for health checks.

src-tauri/src/services/usage_stats.rs

@@ -652,56 +652,6 @@ impl Database {
             monthly_exceeded,
         })
     }
-
-    /// 更新每日统计聚合
-    ///
-    /// 在请求完成后调用，更新 usage_daily_stats 表
-    #[allow(clippy::too_many_arguments)]
-    pub fn update_daily_stats(
-        &self,
-        provider_id: &str,
-        app_type: &str,
-        model: &str,
-        input_tokens: u32,
-        output_tokens: u32,
-        total_cost: &str,
-        is_success: bool,
-    ) -> Result<(), AppError> {
-        let conn = lock_conn!(self.conn);
-        let date = Utc::now().format("%Y-%m-%d").to_string();
-
-        // 使用 UPSERT 更新或插入统计
-        conn.execute(
-            "INSERT INTO usage_daily_stats (
-                date, provider_id, app_type, model,
-                request_count, total_input_tokens, total_output_tokens,
-                total_cost_usd, success_count, error_count
-            ) VALUES (?1, ?2, ?3, ?4, 1, ?5, ?6, ?7, ?8, ?9)
-            ON CONFLICT(date, provider_id, app_type, model) DO UPDATE SET
-                request_count = request_count + 1,
-                total_input_tokens = total_input_tokens + ?5,
-                total_output_tokens = total_output_tokens + ?6,
-                total_cost_usd = CAST(
-                    CAST(total_cost_usd AS REAL) + CAST(?7 AS REAL) AS TEXT
-                ),
-                success_count = success_count + ?8,
-                error_count = error_count + ?9",
-            params![
-                date,
-                provider_id,
-                app_type,
-                model,
-                input_tokens,
-                output_tokens,
-                total_cost,
-                if is_success { 1 } else { 0 },
-                if is_success { 0 } else { 1 },
-            ],
-        )
-        .map_err(|e| AppError::Database(format!("更新每日统计失败: {e}")))?;
-
-        Ok(())
-    }
 }
 
 /// Provider 限额状态