diff --git a/src-tauri/src/commands/usage.rs b/src-tauri/src/commands/usage.rs
index 4e527ebbe..1f92456ef 100644
--- a/src-tauri/src/commands/usage.rs
+++ b/src-tauri/src/commands/usage.rs
@@ -166,6 +166,38 @@ pub fn delete_model_pricing(state: State<'_, AppState>, model_id: String) -> Res
     Ok(())
 }
 
+/// 手动触发会话日志同步
+#[tauri::command]
+pub fn sync_session_usage(
+    state: State<'_, AppState>,
+) -> Result<crate::services::session_usage::SessionSyncResult, AppError> {
+    // 同步 Claude 会话日志
+    let mut result = crate::services::session_usage::sync_claude_session_logs(&state.db)?;
+
+    // 同步 Codex 使用数据
+    match crate::services::session_usage_codex::sync_codex_usage(&state.db) {
+        Ok(codex_result) => {
+            result.imported += codex_result.imported;
+            result.skipped += codex_result.skipped;
+            result.files_scanned += codex_result.files_scanned;
+            result.errors.extend(codex_result.errors);
+        }
+        Err(e) => {
+            result.errors.push(format!("Codex 同步失败: {e}"));
+        }
+    }
+
+    Ok(result)
+}
+
+/// 获取数据来源分布
+#[tauri::command]
+pub fn get_usage_data_sources(
+    state: State<'_, AppState>,
+) -> Result<Vec<crate::services::session_usage::DataSourceSummary>, AppError> {
+    crate::services::session_usage::get_data_source_breakdown(&state.db)
+}
+
 /// 模型定价信息
 #[derive(Debug, Clone, serde::Serialize, serde::Deserialize)]
 #[serde(rename_all = "camelCase")]
diff --git a/src-tauri/src/database/mod.rs b/src-tauri/src/database/mod.rs
index d093c0971..1e5f1fe23 100644
--- a/src-tauri/src/database/mod.rs
+++ b/src-tauri/src/database/mod.rs
@@ -44,7 +44,7 @@ use std::sync::Mutex;
 
 /// 当前 Schema 版本号
 /// 每次修改表结构时递增，并在 schema.rs 中添加相应的迁移逻辑
-pub(crate) const SCHEMA_VERSION: i32 = 7;
+pub(crate) const SCHEMA_VERSION: i32 = 8;
 
 /// 安全地序列化 JSON，避免 unwrap panic
 pub(crate) fn to_json_string<T: Serialize>(value: &T) -> Result<String, AppError> {
diff --git a/src-tauri/src/database/schema.rs b/src-tauri/src/database/schema.rs
index e85d8827a..b3e9d26e2 100644
--- a/src-tauri/src/database/schema.rs
+++ b/src-tauri/src/database/schema.rs
@@ -189,7 +189,8 @@ impl Database {
             total_cost_usd TEXT NOT NULL DEFAULT '0', latency_ms INTEGER NOT NULL, first_token_ms INTEGER,
             duration_ms INTEGER, status_code INTEGER NOT NULL, error_message TEXT, session_id TEXT,
             provider_type TEXT, is_streaming INTEGER NOT NULL DEFAULT 0,
-            cost_multiplier TEXT NOT NULL DEFAULT '1.0', created_at INTEGER NOT NULL
+            cost_multiplier TEXT NOT NULL DEFAULT '1.0', created_at INTEGER NOT NULL,
+            data_source TEXT NOT NULL DEFAULT 'proxy'
         )", []).map_err(|e| AppError::Database(e.to_string()))?;
 
         conn.execute("CREATE INDEX IF NOT EXISTS idx_request_logs_provider ON proxy_request_logs(provider_id, app_type)", [])
@@ -271,6 +272,18 @@ impl Database {
         )
         .map_err(|e| AppError::Database(e.to_string()))?;
 
+        // 18. Session Log Sync 表 (会话日志同步状态)
+        conn.execute(
+            "CREATE TABLE IF NOT EXISTS session_log_sync (
+                file_path TEXT PRIMARY KEY,
+                last_modified INTEGER NOT NULL,
+                last_line_offset INTEGER NOT NULL DEFAULT 0,
+                last_synced_at INTEGER NOT NULL
+            )",
+            [],
+        )
+        .map_err(|e| AppError::Database(e.to_string()))?;
+
         // 尝试添加 live_takeover_active 列到 proxy_config 表
         let _ = conn.execute(
             "ALTER TABLE proxy_config ADD COLUMN live_takeover_active INTEGER NOT NULL DEFAULT 0",
@@ -400,6 +413,11 @@ impl Database {
                         Self::migrate_v6_to_v7(conn)?;
                         Self::set_user_version(conn, 7)?;
                     }
+                    7 => {
+                        log::info!("迁移数据库从 v7 到 v8（会话日志使用追踪）");
+                        Self::migrate_v7_to_v8(conn)?;
+                        Self::set_user_version(conn, 8)?;
+                    }
                     _ => {
                         return Err(AppError::Database(format!(
                             "未知的数据库版本 {version}，无法迁移到 {SCHEMA_VERSION}"
@@ -1060,6 +1078,34 @@ impl Database {
         Ok(())
     }
 
+    /// v7 -> v8: 会话日志使用追踪（无代理模式统计支持）
+    fn migrate_v7_to_v8(conn: &Connection) -> Result<(), AppError> {
+        // 1. 为 proxy_request_logs 添加 data_source 列，区分数据来源
+        if Self::table_exists(conn, "proxy_request_logs")? {
+            Self::add_column_if_missing(
+                conn,
+                "proxy_request_logs",
+                "data_source",
+                "TEXT NOT NULL DEFAULT 'proxy'",
+            )?;
+        }
+
+        // 2. 创建会话日志同步状态表
+        conn.execute(
+            "CREATE TABLE IF NOT EXISTS session_log_sync (
+                file_path TEXT PRIMARY KEY,
+                last_modified INTEGER NOT NULL,
+                last_line_offset INTEGER NOT NULL DEFAULT 0,
+                last_synced_at INTEGER NOT NULL
+            )",
+            [],
+        )
+        .map_err(|e| AppError::Database(format!("创建 session_log_sync 表失败: {e}")))?;
+
+        log::info!("v7 -> v8 迁移完成：已添加 data_source 列和 session_log_sync 表");
+        Ok(())
+    }
+
     /// 插入默认模型定价数据
     /// 格式: (model_id, display_name, input, output, cache_read, cache_creation)
     /// 注意: model_id 使用短横线格式（如 claude-haiku-4-5），与 API 返回的模型名称标准化后一致
diff --git a/src-tauri/src/lib.rs b/src-tauri/src/lib.rs
index d7490e924..186215b89 100644
--- a/src-tauri/src/lib.rs
+++ b/src-tauri/src/lib.rs
@@ -796,6 +796,51 @@ pub fn run() {
                         }
                     }
                 });
+
+                // Session log usage sync: 启动时同步一次，之后每 60 秒检查
+                let db_for_session_sync = state.db.clone();
+                tauri::async_runtime::spawn(async move {
+                    const SESSION_SYNC_INTERVAL_SECS: u64 = 60;
+
+                    // 首次同步
+                    if let Err(e) =
+                        crate::services::session_usage::sync_claude_session_logs(
+                            &db_for_session_sync,
+                        )
+                    {
+                        log::warn!("Session usage initial sync failed: {e}");
+                    }
+                    if let Err(e) =
+                        crate::services::session_usage_codex::sync_codex_usage(
+                            &db_for_session_sync,
+                        )
+                    {
+                        log::warn!("Codex usage initial sync failed: {e}");
+                    }
+
+                    // 定期同步
+                    let mut interval = tokio::time::interval(std::time::Duration::from_secs(
+                        SESSION_SYNC_INTERVAL_SECS,
+                    ));
+                    interval.tick().await; // skip immediate first tick
+                    loop {
+                        interval.tick().await;
+                        if let Err(e) =
+                            crate::services::session_usage::sync_claude_session_logs(
+                                &db_for_session_sync,
+                            )
+                        {
+                            log::warn!("Session usage periodic sync failed: {e}");
+                        }
+                        if let Err(e) =
+                            crate::services::session_usage_codex::sync_codex_usage(
+                                &db_for_session_sync,
+                            )
+                        {
+                            log::warn!("Codex usage periodic sync failed: {e}");
+                        }
+                    }
+                });
             });
 
             // Linux: 禁用 WebKitGTK 硬件加速，防止 EGL 初始化失败导致白屏
@@ -1025,6 +1070,9 @@ pub fn run() {
             commands::update_model_pricing,
             commands::delete_model_pricing,
             commands::check_provider_limits,
+            // Session usage sync
+            commands::sync_session_usage,
+            commands::get_usage_data_sources,
             // Stream health check
             commands::stream_check_provider,
             commands::stream_check_all_providers,
diff --git a/src-tauri/src/services/mod.rs b/src-tauri/src/services/mod.rs
index 64c1f641b..d64711245 100644
--- a/src-tauri/src/services/mod.rs
+++ b/src-tauri/src/services/mod.rs
@@ -9,6 +9,8 @@ pub mod omo;
 pub mod prompt;
 pub mod provider;
 pub mod proxy;
+pub mod session_usage;
+pub mod session_usage_codex;
 pub mod skill;
 pub mod speedtest;
 pub mod stream_check;
diff --git a/src-tauri/src/services/session_usage.rs b/src-tauri/src/services/session_usage.rs
new file mode 100644
index 000000000..dd4bbbb92
--- /dev/null
+++ b/src-tauri/src/services/session_usage.rs
@@ -0,0 +1,634 @@
+//! Claude Code 会话日志使用追踪
+//!
+//! 从 ~/.claude/projects/ 下的 JSONL 会话文件中提取 token 使用数据，
+//! 实现无代理模式下的使用统计。
+//!
+//! ## 数据流
+//! ```text
+//! ~/.claude/projects/*/*.jsonl → 增量解析 → 去重 → 费用计算 → proxy_request_logs 表
+//! ```
+
+use crate::config::get_claude_config_dir;
+use crate::database::{lock_conn, Database};
+use crate::error::AppError;
+use crate::proxy::usage::calculator::{CostCalculator, ModelPricing};
+use crate::proxy::usage::parser::TokenUsage;
+use rust_decimal::Decimal;
+use serde::{Deserialize, Serialize};
+use std::collections::HashMap;
+use std::fs;
+use std::io::{BufRead, BufReader};
+use std::path::{Path, PathBuf};
+use std::time::SystemTime;
+
+/// 同步结果
+#[derive(Debug, Clone, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct SessionSyncResult {
+    pub imported: u32,
+    pub skipped: u32,
+    pub files_scanned: u32,
+    pub errors: Vec<String>,
+}
+
+/// 数据来源分布
+#[derive(Debug, Clone, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct DataSourceSummary {
+    pub data_source: String,
+    pub request_count: u32,
+    pub total_cost_usd: String,
+}
+
+/// 从 JSONL 中解析出的 assistant 消息使用数据
+#[derive(Debug)]
+struct ParsedAssistantUsage {
+    message_id: String,
+    model: String,
+    input_tokens: u32,
+    output_tokens: u32,
+    cache_read_tokens: u32,
+    cache_creation_tokens: u32,
+    stop_reason: Option<String>,
+    timestamp: Option<String>,
+    session_id: Option<String>,
+}
+
+/// 同步 Claude Code 会话日志到使用统计数据库
+pub fn sync_claude_session_logs(db: &Database) -> Result<SessionSyncResult, AppError> {
+    let projects_dir = get_claude_config_dir().join("projects");
+    if !projects_dir.exists() {
+        return Ok(SessionSyncResult {
+            imported: 0,
+            skipped: 0,
+            files_scanned: 0,
+            errors: vec![],
+        });
+    }
+
+    let mut result = SessionSyncResult {
+        imported: 0,
+        skipped: 0,
+        files_scanned: 0,
+        errors: vec![],
+    };
+
+    // 收集所有 .jsonl 文件
+    let jsonl_files = collect_jsonl_files(&projects_dir);
+
+    for file_path in &jsonl_files {
+        result.files_scanned += 1;
+
+        match sync_single_file(db, file_path) {
+            Ok((imported, skipped)) => {
+                result.imported += imported;
+                result.skipped += skipped;
+            }
+            Err(e) => {
+                let msg = format!("{}: {e}", file_path.display());
+                log::warn!("[SESSION-SYNC] 文件解析失败: {msg}");
+                result.errors.push(msg);
+            }
+        }
+    }
+
+    if result.imported > 0 {
+        log::info!(
+            "[SESSION-SYNC] 同步完成: 导入 {} 条, 跳过 {} 条, 扫描 {} 个文件",
+            result.imported,
+            result.skipped,
+            result.files_scanned
+        );
+    }
+
+    Ok(result)
+}
+
+/// 收集目录下所有 .jsonl 文件
+fn collect_jsonl_files(projects_dir: &Path) -> Vec<PathBuf> {
+    let mut files = Vec::new();
+
+    let entries = match fs::read_dir(projects_dir) {
+        Ok(e) => e,
+        Err(_) => return files,
+    };
+
+    for entry in entries.flatten() {
+        let path = entry.path();
+        if !path.is_dir() {
+            continue;
+        }
+        // 每个项目目录下的 .jsonl 文件
+        if let Ok(sub_entries) = fs::read_dir(&path) {
+            for sub_entry in sub_entries.flatten() {
+                let sub_path = sub_entry.path();
+                if sub_path.extension().and_then(|e| e.to_str()) == Some("jsonl") {
+                    files.push(sub_path);
+                }
+            }
+        }
+    }
+
+    files
+}
+
+/// 同步单个 JSONL 文件，返回 (imported, skipped)
+fn sync_single_file(db: &Database, file_path: &Path) -> Result<(u32, u32), AppError> {
+    let file_path_str = file_path.to_string_lossy().to_string();
+
+    // 获取文件元数据
+    let metadata = fs::metadata(file_path)
+        .map_err(|e| AppError::Config(format!("无法读取文件元数据: {e}")))?;
+    let file_modified = metadata
+        .modified()
+        .ok()
+        .and_then(|t| t.duration_since(SystemTime::UNIX_EPOCH).ok())
+        .map(|d| d.as_secs() as i64)
+        .unwrap_or(0);
+
+    // 检查同步状态
+    let (last_modified, last_offset) = get_sync_state(db, &file_path_str)?;
+
+    // 文件未变化则跳过
+    if file_modified <= last_modified {
+        return Ok((0, 0));
+    }
+
+    // 从上次偏移位置开始增量解析
+    let file = fs::File::open(file_path)
+        .map_err(|e| AppError::Config(format!("无法打开文件: {e}")))?;
+    let reader = BufReader::new(file);
+
+    let mut line_offset: i64 = 0;
+    let mut messages: HashMap<String, ParsedAssistantUsage> = HashMap::new();
+    let mut current_session_id: Option<String> = None;
+
+    for line_result in reader.lines() {
+        line_offset += 1;
+
+        // 跳过已处理的行
+        if line_offset <= last_offset {
+            continue;
+        }
+
+        let line = match line_result {
+            Ok(l) => l,
+            Err(_) => continue, // 容忍不完整的最后一行
+        };
+
+        if line.trim().is_empty() {
+            continue;
+        }
+
+        let value: serde_json::Value = match serde_json::from_str(&line) {
+            Ok(v) => v,
+            Err(_) => continue,
+        };
+
+        // 提取 session ID (从 system 或首条消息)
+        if current_session_id.is_none() {
+            if let Some(sid) = value.get("sessionId").and_then(|v| v.as_str()) {
+                current_session_id = Some(sid.to_string());
+            }
+        }
+
+        // 只处理 assistant 类型的消息
+        if value.get("type").and_then(|t| t.as_str()) != Some("assistant") {
+            continue;
+        }
+
+        let message = match value.get("message") {
+            Some(m) => m,
+            None => continue,
+        };
+
+        let msg_id = match message.get("id").and_then(|v| v.as_str()) {
+            Some(id) => id.to_string(),
+            None => continue,
+        };
+
+        let usage = match message.get("usage") {
+            Some(u) => u,
+            None => continue,
+        };
+
+        let parsed = ParsedAssistantUsage {
+            message_id: msg_id.clone(),
+            model: message
+                .get("model")
+                .and_then(|v| v.as_str())
+                .unwrap_or("unknown")
+                .to_string(),
+            input_tokens: usage
+                .get("input_tokens")
+                .and_then(|v| v.as_u64())
+                .unwrap_or(0) as u32,
+            output_tokens: usage
+                .get("output_tokens")
+                .and_then(|v| v.as_u64())
+                .unwrap_or(0) as u32,
+            cache_read_tokens: usage
+                .get("cache_read_input_tokens")
+                .and_then(|v| v.as_u64())
+                .unwrap_or(0) as u32,
+            cache_creation_tokens: usage
+                .get("cache_creation_input_tokens")
+                .and_then(|v| v.as_u64())
+                .unwrap_or(0) as u32,
+            stop_reason: message
+                .get("stop_reason")
+                .and_then(|v| v.as_str())
+                .map(|s| s.to_string()),
+            timestamp: value
+                .get("timestamp")
+                .and_then(|v| v.as_str())
+                .map(|s| s.to_string()),
+            session_id: current_session_id.clone(),
+        };
+
+        // 按 message.id 去重：优先保留有 stop_reason 的条目，否则保留最新的
+        let should_replace = match messages.get(&msg_id) {
+            None => true,
+            Some(existing) => {
+                // 新条目有 stop_reason 而旧条目没有 → 替换
+                if parsed.stop_reason.is_some() && existing.stop_reason.is_none() {
+                    true
+                }
+                // 两个都有或都没有 stop_reason → 取 output_tokens 更大的
+                else if parsed.stop_reason.is_some() == existing.stop_reason.is_some() {
+                    parsed.output_tokens > existing.output_tokens
+                } else {
+                    false
+                }
+            }
+        };
+
+        if should_replace {
+            messages.insert(msg_id, parsed);
+        }
+    }
+
+    // 写入数据库
+    let mut imported: u32 = 0;
+    let mut skipped: u32 = 0;
+
+    for (_, msg) in &messages {
+        // 只导入有 stop_reason 的最终条目（完整的 API 调用）
+        if msg.stop_reason.is_none() {
+            continue;
+        }
+
+        let request_id = format!("session:{}", msg.message_id);
+
+        // 跳过 output_tokens 为 0 的无意义条目
+        if msg.output_tokens == 0 {
+            continue;
+        }
+
+        match insert_session_log_entry(db, &request_id, msg) {
+            Ok(true) => imported += 1,
+            Ok(false) => skipped += 1,
+            Err(e) => {
+                log::warn!("[SESSION-SYNC] 插入失败 ({}): {e}", msg.message_id);
+                skipped += 1;
+            }
+        }
+    }
+
+    // 更新同步状态
+    update_sync_state(db, &file_path_str, file_modified, line_offset)?;
+
+    Ok((imported, skipped))
+}
+
+/// 获取文件的同步状态
+fn get_sync_state(db: &Database, file_path: &str) -> Result<(i64, i64), AppError> {
+    let conn = lock_conn!(db.conn);
+    let result = conn.query_row(
+        "SELECT last_modified, last_line_offset FROM session_log_sync WHERE file_path = ?1",
+        rusqlite::params![file_path],
+        |row| Ok((row.get::<_, i64>(0)?, row.get::<_, i64>(1)?)),
+    );
+    Ok(result.unwrap_or((0, 0)))
+}
+
+/// 更新文件的同步状态
+fn update_sync_state(
+    db: &Database,
+    file_path: &str,
+    last_modified: i64,
+    last_offset: i64,
+) -> Result<(), AppError> {
+    let now = SystemTime::now()
+        .duration_since(SystemTime::UNIX_EPOCH)
+        .map(|d| d.as_secs() as i64)
+        .unwrap_or(0);
+
+    let conn = lock_conn!(db.conn);
+    conn.execute(
+        "INSERT OR REPLACE INTO session_log_sync (file_path, last_modified, last_line_offset, last_synced_at)
+         VALUES (?1, ?2, ?3, ?4)",
+        rusqlite::params![file_path, last_modified, last_offset, now],
+    )
+    .map_err(|e| AppError::Database(format!("更新同步状态失败: {e}")))?;
+    Ok(())
+}
+
+/// 插入单条会话日志到 proxy_request_logs，返回是否成功插入 (true=新插入, false=已存在)
+fn insert_session_log_entry(
+    db: &Database,
+    request_id: &str,
+    msg: &ParsedAssistantUsage,
+) -> Result<bool, AppError> {
+    let conn = lock_conn!(db.conn);
+
+    // 检查是否已存在
+    let exists: bool = conn
+        .query_row(
+            "SELECT COUNT(*) FROM proxy_request_logs WHERE request_id = ?1",
+            rusqlite::params![request_id],
+            |row| row.get::<_, i64>(0).map(|c| c > 0),
+        )
+        .unwrap_or(false);
+
+    if exists {
+        return Ok(false);
+    }
+
+    // 解析时间戳
+    let created_at = msg
+        .timestamp
+        .as_ref()
+        .and_then(|ts| {
+            // 尝试解析 ISO 8601 时间戳
+            chrono::DateTime::parse_from_rfc3339(ts)
+                .ok()
+                .map(|dt| dt.timestamp())
+        })
+        .unwrap_or_else(|| {
+            SystemTime::now()
+                .duration_since(SystemTime::UNIX_EPOCH)
+                .map(|d| d.as_secs() as i64)
+                .unwrap_or(0)
+        });
+
+    // 计算费用
+    let usage = TokenUsage {
+        input_tokens: msg.input_tokens,
+        output_tokens: msg.output_tokens,
+        cache_read_tokens: msg.cache_read_tokens,
+        cache_creation_tokens: msg.cache_creation_tokens,
+        model: Some(msg.model.clone()),
+    };
+
+    let pricing = find_model_pricing_for_session(&conn, &msg.model);
+    let multiplier = Decimal::from(1);
+    let (input_cost, output_cost, cache_read_cost, cache_creation_cost, total_cost) =
+        match pricing {
+            Some(p) => {
+                let cost = CostCalculator::calculate(&usage, &p, multiplier);
+                (
+                    cost.input_cost.to_string(),
+                    cost.output_cost.to_string(),
+                    cost.cache_read_cost.to_string(),
+                    cost.cache_creation_cost.to_string(),
+                    cost.total_cost.to_string(),
+                )
+            }
+            None => (
+                "0".to_string(),
+                "0".to_string(),
+                "0".to_string(),
+                "0".to_string(),
+                "0".to_string(),
+            ),
+        };
+
+    conn.execute(
+        "INSERT OR IGNORE INTO proxy_request_logs (
+            request_id, provider_id, app_type, model, request_model,
+            input_tokens, output_tokens, cache_read_tokens, cache_creation_tokens,
+            input_cost_usd, output_cost_usd, cache_read_cost_usd, cache_creation_cost_usd, total_cost_usd,
+            latency_ms, first_token_ms, status_code, error_message, session_id,
+            provider_type, is_streaming, cost_multiplier, created_at, data_source
+        ) VALUES (?1, ?2, ?3, ?4, ?5, ?6, ?7, ?8, ?9, ?10, ?11, ?12, ?13, ?14, ?15, ?16, ?17, ?18, ?19, ?20, ?21, ?22, ?23, ?24)",
+        rusqlite::params![
+            request_id,
+            "_session",         // provider_id: 标记为会话来源
+            "claude",           // app_type
+            msg.model,
+            msg.model,          // request_model = model
+            msg.input_tokens,
+            msg.output_tokens,
+            msg.cache_read_tokens,
+            msg.cache_creation_tokens,
+            input_cost,
+            output_cost,
+            cache_read_cost,
+            cache_creation_cost,
+            total_cost,
+            0i64,               // latency_ms: 会话日志无此数据
+            Option::<i64>::None, // first_token_ms
+            200i64,             // status_code: 有 stop_reason 说明请求成功
+            Option::<String>::None, // error_message
+            msg.session_id,
+            Some("session_log"), // provider_type
+            1i64,               // is_streaming: Claude Code 通常使用流式
+            "1.0",              // cost_multiplier
+            created_at,
+            "session_log",      // data_source
+        ],
+    )
+    .map_err(|e| AppError::Database(format!("插入会话日志失败: {e}")))?;
+
+    Ok(true)
+}
+
+/// 从 model_pricing 表查找模型定价（支持模糊匹配）
+fn find_model_pricing_for_session(
+    conn: &rusqlite::Connection,
+    model_id: &str,
+) -> Option<ModelPricing> {
+    // 精确匹配
+    if let Ok(Some(pricing)) = try_find_pricing(conn, model_id) {
+        return Some(pricing);
+    }
+
+    // 模糊匹配：去掉日期后缀
+    // 例如 "claude-opus-4-6-20260206" -> "claude-opus-4-6"
+    let parts: Vec<&str> = model_id.rsplitn(2, '-').collect();
+    if parts.len() == 2 {
+        if let Some(suffix) = parts.first() {
+            if suffix.len() == 8 && suffix.chars().all(|c| c.is_ascii_digit()) {
+                if let Ok(Some(pricing)) = try_find_pricing(conn, parts[1]) {
+                    return Some(pricing);
+                }
+            }
+        }
+    }
+
+    // 尝试 LIKE 匹配
+    let pattern = format!("{model_id}%");
+    let result = conn.query_row(
+        "SELECT input_cost_per_million, output_cost_per_million,
+                cache_read_cost_per_million, cache_creation_cost_per_million
+         FROM model_pricing WHERE model_id LIKE ?1 LIMIT 1",
+        rusqlite::params![pattern],
+        |row| {
+            Ok((
+                row.get::<_, String>(0)?,
+                row.get::<_, String>(1)?,
+                row.get::<_, String>(2)?,
+                row.get::<_, String>(3)?,
+            ))
+        },
+    );
+
+    match result {
+        Ok((input, output, cache_read, cache_creation)) => {
+            ModelPricing::from_strings(&input, &output, &cache_read, &cache_creation).ok()
+        }
+        Err(_) => None,
+    }
+}
+
+fn try_find_pricing(
+    conn: &rusqlite::Connection,
+    model_id: &str,
+) -> Result<Option<ModelPricing>, AppError> {
+    let result = conn.query_row(
+        "SELECT input_cost_per_million, output_cost_per_million,
+                cache_read_cost_per_million, cache_creation_cost_per_million
+         FROM model_pricing WHERE model_id = ?1",
+        rusqlite::params![model_id],
+        |row| {
+            Ok((
+                row.get::<_, String>(0)?,
+                row.get::<_, String>(1)?,
+                row.get::<_, String>(2)?,
+                row.get::<_, String>(3)?,
+            ))
+        },
+    );
+
+    match result {
+        Ok((input, output, cache_read, cache_creation)) => {
+            ModelPricing::from_strings(&input, &output, &cache_read, &cache_creation)
+                .map(Some)
+                .map_err(|e| AppError::Database(format!("解析定价失败: {e}")))
+        }
+        Err(rusqlite::Error::QueryReturnedNoRows) => Ok(None),
+        Err(e) => Err(AppError::Database(format!("查询定价失败: {e}"))),
+    }
+}
+
+/// 查询数据来源分布统计
+pub fn get_data_source_breakdown(db: &Database) -> Result<Vec<DataSourceSummary>, AppError> {
+    let conn = lock_conn!(db.conn);
+
+    let mut stmt = conn.prepare(
+        "SELECT COALESCE(data_source, 'proxy') as ds, COUNT(*) as cnt,
+                COALESCE(SUM(CAST(total_cost_usd AS REAL)), 0) as cost
+         FROM proxy_request_logs
+         GROUP BY ds
+         ORDER BY cnt DESC",
+    )?;
+
+    let rows = stmt.query_map([], |row| {
+        Ok(DataSourceSummary {
+            data_source: row.get(0)?,
+            request_count: row.get::<_, i64>(1)? as u32,
+            total_cost_usd: format!("{:.6}", row.get::<_, f64>(2)?),
+        })
+    })?;
+
+    let mut summaries = Vec::new();
+    for row in rows {
+        summaries.push(row.map_err(|e| AppError::Database(e.to_string()))?);
+    }
+
+    Ok(summaries)
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_parse_usage_from_jsonl_line() {
+        let line = r#"{"type":"assistant","message":{"id":"msg_test123","model":"claude-opus-4-6","usage":{"input_tokens":3,"output_tokens":150,"cache_read_input_tokens":5000,"cache_creation_input_tokens":10000},"stop_reason":"end_turn"},"timestamp":"2026-04-05T12:00:00Z","sessionId":"session-abc"}"#;
+
+        let value: serde_json::Value = serde_json::from_str(line).unwrap();
+        assert_eq!(
+            value.get("type").and_then(|t| t.as_str()),
+            Some("assistant")
+        );
+
+        let message = value.get("message").unwrap();
+        let usage = message.get("usage").unwrap();
+
+        assert_eq!(usage.get("input_tokens").unwrap().as_u64().unwrap(), 3);
+        assert_eq!(usage.get("output_tokens").unwrap().as_u64().unwrap(), 150);
+        assert_eq!(
+            usage
+                .get("cache_read_input_tokens")
+                .unwrap()
+                .as_u64()
+                .unwrap(),
+            5000
+        );
+        assert_eq!(
+            usage
+                .get("cache_creation_input_tokens")
+                .unwrap()
+                .as_u64()
+                .unwrap(),
+            10000
+        );
+        assert_eq!(
+            message.get("stop_reason").unwrap().as_str().unwrap(),
+            "end_turn"
+        );
+    }
+
+    #[test]
+    fn test_dedup_by_message_id() {
+        // 同一个 message.id 有多条，应该取 stop_reason 有值的那条
+        let mut messages: HashMap<String, ParsedAssistantUsage> = HashMap::new();
+
+        // 中间条目（无 stop_reason）
+        let intermediate = ParsedAssistantUsage {
+            message_id: "msg_1".to_string(),
+            model: "claude-opus-4-6".to_string(),
+            input_tokens: 3,
+            output_tokens: 26,
+            cache_read_tokens: 5000,
+            cache_creation_tokens: 10000,
+            stop_reason: None,
+            timestamp: Some("2026-04-05T12:00:00Z".to_string()),
+            session_id: None,
+        };
+        messages.insert("msg_1".to_string(), intermediate);
+
+        // 最终条目（有 stop_reason）
+        let final_entry = ParsedAssistantUsage {
+            message_id: "msg_1".to_string(),
+            model: "claude-opus-4-6".to_string(),
+            input_tokens: 3,
+            output_tokens: 1349,
+            cache_read_tokens: 5000,
+            cache_creation_tokens: 10000,
+            stop_reason: Some("end_turn".to_string()),
+            timestamp: Some("2026-04-05T12:00:00Z".to_string()),
+            session_id: None,
+        };
+
+        // 应该替换
+        let should_replace = final_entry.stop_reason.is_some()
+            && messages.get("msg_1").unwrap().stop_reason.is_none();
+        assert!(should_replace);
+
+        messages.insert("msg_1".to_string(), final_entry);
+        assert_eq!(messages.get("msg_1").unwrap().output_tokens, 1349);
+    }
+}
diff --git a/src-tauri/src/services/session_usage_codex.rs b/src-tauri/src/services/session_usage_codex.rs
new file mode 100644
index 000000000..4e2a3041b
--- /dev/null
+++ b/src-tauri/src/services/session_usage_codex.rs
@@ -0,0 +1,254 @@
+//! Codex 使用数据导入
+//!
+//! 从 ~/.codex/state_5.sqlite 的 threads 表读取 token 使用数据，
+//! 导入到 proxy_request_logs 表。
+//!
+//! ## 限制
+//! - Thread 级粒度（非请求级）
+//! - 只有总 token 数，使用估算比例分 input/output
+
+use crate::codex_config::get_codex_config_dir;
+use crate::database::{lock_conn, Database};
+use crate::error::AppError;
+use crate::proxy::usage::calculator::{CostCalculator, ModelPricing};
+use crate::proxy::usage::parser::TokenUsage;
+use crate::services::session_usage::SessionSyncResult;
+use rust_decimal::Decimal;
+
+/// 默认 input/output 比例（70% input, 30% output）
+const DEFAULT_INPUT_RATIO: f64 = 0.7;
+
+/// 同步 Codex 使用数据
+pub fn sync_codex_usage(db: &Database) -> Result<SessionSyncResult, AppError> {
+    let codex_dir = get_codex_config_dir();
+    let state_db_path = codex_dir.join("state_5.sqlite");
+
+    if !state_db_path.exists() {
+        return Ok(SessionSyncResult {
+            imported: 0,
+            skipped: 0,
+            files_scanned: 0,
+            errors: vec![],
+        });
+    }
+
+    let mut result = SessionSyncResult {
+        imported: 0,
+        skipped: 0,
+        files_scanned: 1,
+        errors: vec![],
+    };
+
+    // 只读打开 Codex SQLite 数据库
+    let codex_conn = match rusqlite::Connection::open_with_flags(
+        &state_db_path,
+        rusqlite::OpenFlags::SQLITE_OPEN_READ_ONLY | rusqlite::OpenFlags::SQLITE_OPEN_NO_MUTEX,
+    ) {
+        Ok(c) => c,
+        Err(e) => {
+            result.errors.push(format!("无法打开 Codex 数据库: {e}"));
+            return Ok(result);
+        }
+    };
+
+    // 查询所有 thread
+    let mut stmt = match codex_conn.prepare(
+        "SELECT id, model, model_provider, tokens_used, created_at, title
+         FROM threads
+         WHERE tokens_used > 0
+         ORDER BY created_at DESC",
+    ) {
+        Ok(s) => s,
+        Err(e) => {
+            result
+                .errors
+                .push(format!("查询 Codex threads 失败: {e}"));
+            return Ok(result);
+        }
+    };
+
+    let rows = match stmt.query_map([], |row| {
+        Ok((
+            row.get::<_, String>(0)?,  // id
+            row.get::<_, Option<String>>(1)?, // model (nullable)
+            row.get::<_, String>(2)?,  // model_provider
+            row.get::<_, i64>(3)?,     // tokens_used
+            row.get::<_, i64>(4)?,     // created_at (unix seconds)
+            row.get::<_, String>(5)?,  // title
+        ))
+    }) {
+        Ok(r) => r,
+        Err(e) => {
+            result.errors.push(format!("遍历 threads 失败: {e}"));
+            return Ok(result);
+        }
+    };
+
+    let conn = lock_conn!(db.conn);
+
+    for row_result in rows {
+        let (thread_id, model, _provider, tokens_used, created_at, _title) = match row_result {
+            Ok(r) => r,
+            Err(e) => {
+                result.errors.push(format!("读取行失败: {e}"));
+                continue;
+            }
+        };
+
+        let request_id = format!("codex_thread:{thread_id}");
+        let model = model.unwrap_or_else(|| "unknown".to_string());
+
+        // 检查是否已存在
+        let exists: bool = conn
+            .query_row(
+                "SELECT COUNT(*) FROM proxy_request_logs WHERE request_id = ?1",
+                rusqlite::params![request_id],
+                |row| row.get::<_, i64>(0).map(|c| c > 0),
+            )
+            .unwrap_or(false);
+
+        if exists {
+            result.skipped += 1;
+            continue;
+        }
+
+        // 使用估算比例分配 input/output
+        let input_tokens = (tokens_used as f64 * DEFAULT_INPUT_RATIO) as u32;
+        let output_tokens = tokens_used as u32 - input_tokens;
+
+        let usage = TokenUsage {
+            input_tokens,
+            output_tokens,
+            cache_read_tokens: 0,
+            cache_creation_tokens: 0,
+            model: Some(model.clone()),
+        };
+
+        // 查找定价
+        let pricing = find_codex_pricing(&conn, &model);
+        let multiplier = Decimal::from(1);
+        let (input_cost, output_cost, cache_read_cost, cache_creation_cost, total_cost) =
+            match pricing {
+                Some(p) => {
+                    let cost = CostCalculator::calculate(&usage, &p, multiplier);
+                    (
+                        cost.input_cost.to_string(),
+                        cost.output_cost.to_string(),
+                        cost.cache_read_cost.to_string(),
+                        cost.cache_creation_cost.to_string(),
+                        cost.total_cost.to_string(),
+                    )
+                }
+                None => (
+                    "0".to_string(),
+                    "0".to_string(),
+                    "0".to_string(),
+                    "0".to_string(),
+                    "0".to_string(),
+                ),
+            };
+
+        let insert_result = conn.execute(
+            "INSERT OR IGNORE INTO proxy_request_logs (
+                request_id, provider_id, app_type, model, request_model,
+                input_tokens, output_tokens, cache_read_tokens, cache_creation_tokens,
+                input_cost_usd, output_cost_usd, cache_read_cost_usd, cache_creation_cost_usd, total_cost_usd,
+                latency_ms, first_token_ms, status_code, error_message, session_id,
+                provider_type, is_streaming, cost_multiplier, created_at, data_source
+            ) VALUES (?1, ?2, ?3, ?4, ?5, ?6, ?7, ?8, ?9, ?10, ?11, ?12, ?13, ?14, ?15, ?16, ?17, ?18, ?19, ?20, ?21, ?22, ?23, ?24)",
+            rusqlite::params![
+                request_id,
+                "_codex_session",
+                "codex",
+                model,
+                model,
+                input_tokens,
+                output_tokens,
+                0i64,    // cache_read_tokens
+                0i64,    // cache_creation_tokens
+                input_cost,
+                output_cost,
+                cache_read_cost,
+                cache_creation_cost,
+                total_cost,
+                0i64,    // latency_ms
+                Option::<i64>::None,
+                200i64,  // status_code
+                Option::<String>::None,
+                Some(thread_id),  // session_id = thread_id
+                Some("codex_db"),
+                0i64,    // is_streaming: unknown
+                "1.0",
+                created_at,
+                "codex_db",
+            ],
+        );
+
+        match insert_result {
+            Ok(changed) if changed > 0 => result.imported += 1,
+            Ok(_) => result.skipped += 1,
+            Err(e) => {
+                result.errors.push(format!("插入失败: {e}"));
+                result.skipped += 1;
+            }
+        }
+    }
+
+    if result.imported > 0 {
+        log::info!(
+            "[CODEX-SYNC] 同步完成: 导入 {} 条, 跳过 {} 条",
+            result.imported,
+            result.skipped
+        );
+    }
+
+    Ok(result)
+}
+
+/// 查找 Codex 模型定价
+fn find_codex_pricing(
+    conn: &rusqlite::Connection,
+    model_id: &str,
+) -> Option<ModelPricing> {
+    // 精确匹配
+    let result = conn.query_row(
+        "SELECT input_cost_per_million, output_cost_per_million,
+                cache_read_cost_per_million, cache_creation_cost_per_million
+         FROM model_pricing WHERE model_id = ?1",
+        rusqlite::params![model_id],
+        |row| {
+            Ok((
+                row.get::<_, String>(0)?,
+                row.get::<_, String>(1)?,
+                row.get::<_, String>(2)?,
+                row.get::<_, String>(3)?,
+            ))
+        },
+    );
+
+    match result {
+        Ok((input, output, cache_read, cache_creation)) => {
+            ModelPricing::from_strings(&input, &output, &cache_read, &cache_creation).ok()
+        }
+        Err(_) => {
+            // 尝试 LIKE 匹配
+            let pattern = format!("{model_id}%");
+            conn.query_row(
+                "SELECT input_cost_per_million, output_cost_per_million,
+                        cache_read_cost_per_million, cache_creation_cost_per_million
+                 FROM model_pricing WHERE model_id LIKE ?1 LIMIT 1",
+                rusqlite::params![pattern],
+                |row| {
+                    Ok((
+                        row.get::<_, String>(0)?,
+                        row.get::<_, String>(1)?,
+                        row.get::<_, String>(2)?,
+                        row.get::<_, String>(3)?,
+                    ))
+                },
+            )
+            .ok()
+            .and_then(|(i, o, cr, cc)| ModelPricing::from_strings(&i, &o, &cr, &cc).ok())
+        }
+    }
+}
diff --git a/src-tauri/src/services/usage_stats.rs b/src-tauri/src/services/usage_stats.rs
index af6f75270..d03eea482 100644
--- a/src-tauri/src/services/usage_stats.rs
+++ b/src-tauri/src/services/usage_stats.rs
@@ -113,6 +113,8 @@ pub struct RequestLogDetail {
     pub status_code: u16,
     pub error_message: Option<String>,
     pub created_at: i64,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub data_source: Option<String>,
 }
 
 impl Database {
@@ -588,7 +590,7 @@ impl Database {
                     l.input_tokens, l.output_tokens, l.cache_read_tokens, l.cache_creation_tokens,
                     l.input_cost_usd, l.output_cost_usd, l.cache_read_cost_usd, l.cache_creation_cost_usd, l.total_cost_usd,
                     l.is_streaming, l.latency_ms, l.first_token_ms, l.duration_ms,
-                    l.status_code, l.error_message, l.created_at
+                    l.status_code, l.error_message, l.created_at, l.data_source
              FROM proxy_request_logs l
              LEFT JOIN providers p ON l.provider_id = p.id AND l.app_type = p.app_type
              {where_clause}
@@ -625,6 +627,7 @@ impl Database {
                 status_code: row.get::<_, i64>(20)? as u16,
                 error_message: row.get(21)?,
                 created_at: row.get(22)?,
+                data_source: row.get(23)?,
             })
         })?;
 
@@ -664,7 +667,7 @@ impl Database {
                     input_tokens, output_tokens, cache_read_tokens, cache_creation_tokens,
                     input_cost_usd, output_cost_usd, cache_read_cost_usd, cache_creation_cost_usd, total_cost_usd,
                     is_streaming, latency_ms, first_token_ms, duration_ms,
-                    status_code, error_message, created_at
+                    status_code, error_message, created_at, l.data_source
              FROM proxy_request_logs l
              LEFT JOIN providers p ON l.provider_id = p.id AND l.app_type = p.app_type
              WHERE l.request_id = ?",
@@ -694,6 +697,7 @@ impl Database {
                     status_code: row.get::<_, i64>(20)? as u16,
                     error_message: row.get(21)?,
                     created_at: row.get(22)?,
+                    data_source: row.get(23)?,
                 })
             },
         );
diff --git a/src/components/usage/DataSourceBar.tsx b/src/components/usage/DataSourceBar.tsx
new file mode 100644
index 000000000..e068151e0
--- /dev/null
+++ b/src/components/usage/DataSourceBar.tsx
@@ -0,0 +1,122 @@
+import { useTranslation } from "react-i18next";
+import { useQuery, useQueryClient } from "@tanstack/react-query";
+import { usageApi } from "@/lib/api/usage";
+import { usageKeys } from "@/lib/query/usage";
+import { Database, FileText, RefreshCw, Loader2 } from "lucide-react";
+import { Button } from "@/components/ui/button";
+import { useState } from "react";
+import { toast } from "sonner";
+
+interface DataSourceBarProps {
+  refreshIntervalMs: number;
+}
+
+const DATA_SOURCE_ICONS: Record<string, React.ReactNode> = {
+  proxy: <Database className="h-3.5 w-3.5" />,
+  session_log: <FileText className="h-3.5 w-3.5" />,
+  codex_db: <Database className="h-3.5 w-3.5" />,
+};
+
+export function DataSourceBar({ refreshIntervalMs }: DataSourceBarProps) {
+  const { t } = useTranslation();
+  const queryClient = useQueryClient();
+  const [syncing, setSyncing] = useState(false);
+
+  const { data: sources } = useQuery({
+    queryKey: [...usageKeys.all, "data-sources"],
+    queryFn: usageApi.getDataSourceBreakdown,
+    refetchInterval: refreshIntervalMs > 0 ? refreshIntervalMs : false,
+    refetchIntervalInBackground: false,
+  });
+
+  const handleSync = async () => {
+    setSyncing(true);
+    try {
+      const result = await usageApi.syncSessionUsage();
+      if (result.imported > 0) {
+        toast.success(
+          t("usage.sessionSync.imported", {
+            count: result.imported,
+            defaultValue: "Imported {{count}} records from session logs",
+          }),
+        );
+        // Refresh all usage data
+        queryClient.invalidateQueries({ queryKey: usageKeys.all });
+      } else {
+        toast.info(
+          t("usage.sessionSync.upToDate", {
+            defaultValue: "Session logs are up to date",
+          }),
+        );
+      }
+    } catch {
+      toast.error(
+        t("usage.sessionSync.failed", {
+          defaultValue: "Session sync failed",
+        }),
+      );
+    } finally {
+      setSyncing(false);
+    }
+  };
+
+  if (!sources || sources.length === 0) {
+    return null;
+  }
+
+  const hasNonProxy = sources.some((s) => s.dataSource !== "proxy");
+
+  return (
+    <div className="flex items-center gap-3 text-xs text-muted-foreground bg-muted/30 rounded-lg px-4 py-2">
+      <span className="font-medium text-foreground/70">
+        {t("usage.dataSources", { defaultValue: "Data Sources" })}:
+      </span>
+      <div className="flex items-center gap-3 flex-wrap">
+        {sources.map((source) => (
+          <div
+            key={source.dataSource}
+            className="flex items-center gap-1.5 bg-background/50 rounded-md px-2 py-1"
+          >
+            {DATA_SOURCE_ICONS[source.dataSource] ?? (
+              <Database className="h-3.5 w-3.5" />
+            )}
+            <span>
+              {t(`usage.dataSource.${source.dataSource}`, {
+                defaultValue: source.dataSource,
+              })}
+            </span>
+            <span className="font-mono font-medium text-foreground/80">
+              {source.requestCount.toLocaleString()}
+            </span>
+          </div>
+        ))}
+      </div>
+
+      <div className="ml-auto">
+        <Button
+          variant="ghost"
+          size="sm"
+          className="h-7 px-2 text-xs"
+          onClick={handleSync}
+          disabled={syncing}
+          title={t("usage.sessionSync.trigger", {
+            defaultValue: "Sync session logs",
+          })}
+        >
+          {syncing ? (
+            <Loader2 className="h-3.5 w-3.5 animate-spin" />
+          ) : (
+            <RefreshCw className="h-3.5 w-3.5" />
+          )}
+          <span className="ml-1">
+            {hasNonProxy
+              ? t("usage.sessionSync.resync", { defaultValue: "Sync" })
+              : t("usage.sessionSync.import", {
+                  defaultValue: "Import Sessions",
+                })}
+          </span>
+        </Button>
+      </div>
+    </div>
+  );
+}
diff --git a/src/components/usage/RequestLogTable.tsx b/src/components/usage/RequestLogTable.tsx
index 691a8e075..5d6bd0c17 100644
--- a/src/components/usage/RequestLogTable.tsx
+++ b/src/components/usage/RequestLogTable.tsx
@@ -371,13 +371,16 @@ export function RequestLogTable({ refreshIntervalMs }: RequestLogTableProps) {
                   <TableHead className="whitespace-nowrap">
                     {t("usage.status")}
                   </TableHead>
+                  <TableHead className="whitespace-nowrap">
+                    {t("usage.source", { defaultValue: "Source" })}
+                  </TableHead>
                 </TableRow>
               </TableHeader>
               <TableBody>
                 {logs.length === 0 ? (
                   <TableRow>
                     <TableCell
-                      colSpan={11}
+                      colSpan={12}
                       className="text-center text-muted-foreground"
                     >
                       {t("usage.noData")}
@@ -506,6 +509,21 @@ export function RequestLogTable({ refreshIntervalMs }: RequestLogTableProps) {
                           {log.statusCode}
                         </span>
                       </TableCell>
+                      <TableCell>
+                        {log.dataSource && log.dataSource !== "proxy" ? (
+                          <span className="inline-flex rounded-full px-2 py-0.5 text-[10px] bg-indigo-100 text-indigo-800">
+                            {t(`usage.dataSource.${log.dataSource}`, {
+                              defaultValue: log.dataSource,
+                            })}
+                          </span>
+                        ) : (
+                          <span className="inline-flex rounded-full px-2 py-0.5 text-[10px] bg-gray-100 text-gray-600">
+                            {t("usage.dataSource.proxy", {
+                              defaultValue: "Proxy",
+                            })}
+                          </span>
+                        )}
+                      </TableCell>
                     </TableRow>
                   ))
                 )}
diff --git a/src/components/usage/UsageDashboard.tsx b/src/components/usage/UsageDashboard.tsx
index 81060e357..f11ba536d 100644
--- a/src/components/usage/UsageDashboard.tsx
+++ b/src/components/usage/UsageDashboard.tsx
@@ -6,6 +6,7 @@ import { UsageTrendChart } from "./UsageTrendChart";
 import { RequestLogTable } from "./RequestLogTable";
 import { ProviderStatsTable } from "./ProviderStatsTable";
 import { ModelStatsTable } from "./ModelStatsTable";
+import { DataSourceBar } from "./DataSourceBar";
 import type { TimeRange } from "@/types/usage";
 import { motion } from "framer-motion";
 import {
@@ -100,6 +101,8 @@ export function UsageDashboard() {
         </Tabs>
       </div>
 
+      <DataSourceBar refreshIntervalMs={refreshIntervalMs} />
+
       <UsageSummaryCards days={days} refreshIntervalMs={refreshIntervalMs} />
 
       <UsageTrendChart days={days} refreshIntervalMs={refreshIntervalMs} />
diff --git a/src/i18n/locales/en.json b/src/i18n/locales/en.json
index da49b30a6..8fc98c2ff 100644
--- a/src/i18n/locales/en.json
+++ b/src/i18n/locales/en.json
@@ -1018,6 +1018,21 @@
     "unknownProvider": "Unknown Provider",
     "stream": "Stream",
     "nonStream": "Non-stream",
+    "source": "Source",
+    "dataSources": "Data Sources",
+    "dataSource": {
+      "proxy": "Proxy",
+      "session_log": "Session Log",
+      "codex_db": "Codex DB"
+    },
+    "sessionSync": {
+      "trigger": "Sync session logs",
+      "import": "Import Sessions",
+      "resync": "Sync",
+      "imported": "Imported {{count}} records from session logs",
+      "upToDate": "Session logs are up to date",
+      "failed": "Session sync failed"
+    },
     "totalRecords": "{{total}} records total",
     "modelPricing": "Model Pricing",
     "loadPricingError": "Failed to load pricing data",
diff --git a/src/i18n/locales/ja.json b/src/i18n/locales/ja.json
index bc13a3138..e27cc8411 100644
--- a/src/i18n/locales/ja.json
+++ b/src/i18n/locales/ja.json
@@ -1018,6 +1018,21 @@
     "unknownProvider": "不明なプロバイダー",
     "stream": "ストリーム",
     "nonStream": "非ストリーム",
+    "source": "ソース",
+    "dataSources": "データソース",
+    "dataSource": {
+      "proxy": "プロキシ",
+      "session_log": "セッションログ",
+      "codex_db": "Codex DB"
+    },
+    "sessionSync": {
+      "trigger": "セッションログを同期",
+      "import": "セッションをインポート",
+      "resync": "同期",
+      "imported": "セッションログから {{count}} 件のレコードをインポートしました",
+      "upToDate": "セッションログは最新です",
+      "failed": "セッション同期に失敗しました"
+    },
     "totalRecords": "全 {{total}} 件",
     "modelPricing": "モデル料金",
     "loadPricingError": "料金データの読み込みに失敗しました",
diff --git a/src/i18n/locales/zh.json b/src/i18n/locales/zh.json
index 431e8354f..84f783c00 100644
--- a/src/i18n/locales/zh.json
+++ b/src/i18n/locales/zh.json
@@ -1018,6 +1018,21 @@
     "unknownProvider": "未知供应商",
     "stream": "流",
     "nonStream": "非流",
+    "source": "来源",
+    "dataSources": "数据来源",
+    "dataSource": {
+      "proxy": "代理",
+      "session_log": "会话日志",
+      "codex_db": "Codex 数据库"
+    },
+    "sessionSync": {
+      "trigger": "同步会话日志",
+      "import": "导入会话",
+      "resync": "同步",
+      "imported": "从会话日志导入了 {{count}} 条记录",
+      "upToDate": "会话日志已是最新",
+      "failed": "会话同步失败"
+    },
     "totalRecords": "共 {{total}} 条记录",
     "modelPricing": "模型定价",
     "loadPricingError": "加载定价数据失败",
diff --git a/src/lib/api/usage.ts b/src/lib/api/usage.ts
index dbb38bc9b..981af57d2 100644
--- a/src/lib/api/usage.ts
+++ b/src/lib/api/usage.ts
@@ -9,6 +9,8 @@ import type {
   ModelPricing,
   ProviderLimitStatus,
   PaginatedLogs,
+  SessionSyncResult,
+  DataSourceSummary,
 } from "@/types/usage";
 import type { UsageResult } from "@/types";
 import type { AppId } from "./types";
@@ -115,4 +117,13 @@ export const usageApi = {
   ): Promise<ProviderLimitStatus> => {
     return invoke("check_provider_limits", { providerId, appType });
   },
+
+  // Session usage sync
+  syncSessionUsage: async (): Promise<SessionSyncResult> => {
+    return invoke("sync_session_usage");
+  },
+
+  getDataSourceBreakdown: async (): Promise<DataSourceSummary[]> => {
+    return invoke("get_usage_data_sources");
+  },
 };
diff --git a/src/types/usage.ts b/src/types/usage.ts
index 61dc8774f..6b21e2b71 100644
--- a/src/types/usage.ts
+++ b/src/types/usage.ts
@@ -31,6 +31,20 @@ export interface RequestLog {
   statusCode: number;
   errorMessage?: string;
   createdAt: number;
+  dataSource?: string;
+}
+
+export interface SessionSyncResult {
+  imported: number;
+  skipped: number;
+  filesScanned: number;
+  errors: string[];
+}
+
+export interface DataSourceSummary {
+  dataSource: string;
+  requestCount: number;
+  totalCostUsd: string;
 }
 
 export interface PaginatedLogs {