diff --git a/src-tauri/src/commands/mod.rs b/src-tauri/src/commands/mod.rs
index 536c77d4b..739300016 100644
--- a/src-tauri/src/commands/mod.rs
+++ b/src-tauri/src/commands/mod.rs
@@ -12,6 +12,7 @@ mod provider;
 mod proxy;
 mod settings;
 pub mod skill;
+mod usage;
 
 pub use config::*;
 pub use deeplink::*;
@@ -25,3 +26,4 @@ pub use provider::*;
 pub use proxy::*;
 pub use settings::*;
 pub use skill::*;
+pub use usage::*;
diff --git a/src-tauri/src/commands/usage.rs b/src-tauri/src/commands/usage.rs
index 4b2329926..349496931 100644
--- a/src-tauri/src/commands/usage.rs
+++ b/src-tauri/src/commands/usage.rs
@@ -1,82 +1,89 @@
 //! 使用统计相关命令
 
-use crate::database::Database;
 use crate::error::AppError;
 use crate::services::usage_stats::*;
+use crate::store::AppState;
 use tauri::State;
 
 /// 获取使用量汇总
 #[tauri::command]
 pub fn get_usage_summary(
-    db: State<'_, Database>,
+    state: State<'_, AppState>,
     start_date: Option<i64>,
     end_date: Option<i64>,
 ) -> Result<UsageSummary, AppError> {
-    db.get_usage_summary(start_date, end_date)
+    state.db.get_usage_summary(start_date, end_date)
 }
 
 /// 获取每日趋势
 #[tauri::command]
 pub fn get_usage_trends(
-    db: State<'_, Database>,
+    state: State<'_, AppState>,
     days: u32,
 ) -> Result<Vec<DailyStats>, AppError> {
-    db.get_daily_trends(days)
+    state.db.get_daily_trends(days)
 }
 
 /// 获取 Provider 统计
 #[tauri::command]
-pub fn get_provider_stats(db: State<'_, Database>) -> Result<Vec<ProviderStats>, AppError> {
-    db.get_provider_stats()
+pub fn get_provider_stats(state: State<'_, AppState>) -> Result<Vec<ProviderStats>, AppError> {
+    state.db.get_provider_stats()
 }
 
 /// 获取模型统计
 #[tauri::command]
-pub fn get_model_stats(db: State<'_, Database>) -> Result<Vec<ModelStats>, AppError> {
-    db.get_model_stats()
+pub fn get_model_stats(state: State<'_, AppState>) -> Result<Vec<ModelStats>, AppError> {
+    state.db.get_model_stats()
 }
 
 /// 获取请求日志列表
 #[tauri::command]
 pub fn get_request_logs(
-    db: State<'_, Database>,
-    provider_id: Option<String>,
-    model: Option<String>,
-    status_code: Option<u16>,
-    start_date: Option<i64>,
-    end_date: Option<i64>,
+    state: State<'_, AppState>,
+    filters: LogFilters,
     limit: u32,
     offset: u32,
 ) -> Result<Vec<RequestLogDetail>, AppError> {
-    let filters = LogFilters {
-        provider_id,
-        model,
-        status_code,
-        start_date,
-        end_date,
-    };
-    db.get_request_logs(&filters, limit, offset)
+    state.db.get_request_logs(&filters, limit, offset)
 }
 
 /// 获取单个请求详情
 #[tauri::command]
 pub fn get_request_detail(
-    db: State<'_, Database>,
+    state: State<'_, AppState>,
     request_id: String,
 ) -> Result<Option<RequestLogDetail>, AppError> {
-    db.get_request_detail(&request_id)
+    state.db.get_request_detail(&request_id)
 }
 
 /// 获取模型定价列表
 #[tauri::command]
-pub fn get_model_pricing(db: State<'_, Database>) -> Result<Vec<ModelPricingInfo>, AppError> {
+pub fn get_model_pricing(state: State<'_, AppState>) -> Result<Vec<ModelPricingInfo>, AppError> {
+    log::info!("获取模型定价列表");
+    state.db.ensure_model_pricing_seeded()?;
+
+    let db = state.db.clone();
     let conn = crate::database::lock_conn!(db.conn);
-    
+
+    // 检查表是否存在
+    let table_exists: bool = conn
+        .query_row(
+            "SELECT COUNT(*) FROM sqlite_master WHERE type='table' AND name='model_pricing'",
+            [],
+            |row| row.get::<_, i64>(0).map(|count| count > 0),
+        )
+        .unwrap_or(false);
+
+    if !table_exists {
+        log::error!("model_pricing 表不存在,可能需要重启应用以触发数据库迁移");
+        return Ok(Vec::new());
+    }
+
     let mut stmt = conn.prepare(
         "SELECT model_id, display_name, input_cost_per_million, output_cost_per_million,
                 cache_read_cost_per_million, cache_creation_cost_per_million
          FROM model_pricing
-         ORDER BY display_name"
+         ORDER BY display_name",
     )?;
 
     let rows = stmt.query_map([], |row| {
@@ -95,13 +102,14 @@ pub fn get_model_pricing(db: State<'_, Database>) -> Result<Vec<ModelPricingInfo
         pricing.push(row?);
     }
 
+    log::info!("成功获取 {} 条模型定价数据", pricing.len());
     Ok(pricing)
 }
 
 /// 更新模型定价
 #[tauri::command]
 pub fn update_model_pricing(
-    db: State<'_, Database>,
+    state: State<'_, AppState>,
     model_id: String,
     display_name: String,
     input_cost: String,
@@ -109,6 +117,7 @@ pub fn update_model_pricing(
     cache_read_cost: String,
     cache_creation_cost: String,
 ) -> Result<(), AppError> {
+    let db = state.db.clone();
     let conn = crate::database::lock_conn!(db.conn);
 
     conn.execute(
@@ -133,15 +142,32 @@ pub fn update_model_pricing(
 /// 检查 Provider 使用限额
 #[tauri::command]
 pub fn check_provider_limits(
-    db: State<'_, Database>,
+    state: State<'_, AppState>,
     provider_id: String,
     app_type: String,
 ) -> Result<crate::services::usage_stats::ProviderLimitStatus, AppError> {
-    db.check_provider_limits(&provider_id, &app_type)
+    state.db.check_provider_limits(&provider_id, &app_type)
+}
+
+/// 删除模型定价
+#[tauri::command]
+pub fn delete_model_pricing(state: State<'_, AppState>, model_id: String) -> Result<(), AppError> {
+    let db = state.db.clone();
+    let conn = crate::database::lock_conn!(db.conn);
+
+    conn.execute(
+        "DELETE FROM model_pricing WHERE model_id = ?1",
+        rusqlite::params![model_id],
+    )
+    .map_err(|e| AppError::Database(format!("删除模型定价失败: {e}")))?;
+
+    log::info!("已删除模型定价: {model_id}");
+    Ok(())
 }
 
 /// 模型定价信息
 #[derive(Debug, Clone, serde::Serialize, serde::Deserialize)]
+#[serde(rename_all = "camelCase")]
 pub struct ModelPricingInfo {
     pub model_id: String,
     pub display_name: String,
diff --git a/src-tauri/src/lib.rs b/src-tauri/src/lib.rs
index 106b2cb35..d46a75d84 100644
--- a/src-tauri/src/lib.rs
+++ b/src-tauri/src/lib.rs
@@ -650,6 +650,17 @@ pub fn run() {
             commands::get_proxy_config,
             commands::update_proxy_config,
             commands::is_proxy_running,
+            // Usage statistics
+            commands::get_usage_summary,
+            commands::get_usage_trends,
+            commands::get_provider_stats,
+            commands::get_model_stats,
+            commands::get_request_logs,
+            commands::get_request_detail,
+            commands::get_model_pricing,
+            commands::update_model_pricing,
+            commands::delete_model_pricing,
+            commands::check_provider_limits,
         ]);
 
     let app = builder
diff --git a/src-tauri/src/services/mod.rs b/src-tauri/src/services/mod.rs
index a861113ae..efa57d254 100644
--- a/src-tauri/src/services/mod.rs
+++ b/src-tauri/src/services/mod.rs
@@ -7,6 +7,7 @@ pub mod provider;
 pub mod proxy;
 pub mod skill;
 pub mod speedtest;
+pub mod usage_stats;
 
 pub use config::ConfigService;
 pub use mcp::McpService;
@@ -15,3 +16,8 @@ pub use provider::{ProviderService, ProviderSortUpdate};
 pub use proxy::ProxyService;
 pub use skill::{Skill, SkillRepo, SkillService};
 pub use speedtest::{EndpointLatency, SpeedtestService};
+#[allow(unused_imports)]
+pub use usage_stats::{
+    DailyStats, LogFilters, ModelStats, ProviderLimitStatus, ProviderStats, RequestLogDetail,
+    UsageSummary,
+};