fix: rowid column shift in get_message_with_rowid; add file logging and frontend error reporting

apps/desktop/Cargo.toml

@@ -21,12 +21,14 @@ tauri = { version = "2", features = [] }
 tauri-plugin-opener = "2"
 tracing-subscriber.workspace = true
 tracing.workspace = true
+tracing-appender.workspace = true
 serde.workspace = true
 serde_json.workspace = true
 tokio.workspace = true
 reqwest.workspace = true
 futures.workspace = true
 uuid.workspace = true
+dirs.workspace = true
 xianren-core = { path = "../../crates/core" }
 xianren-engine = { path = "../../crates/engine" }
 xianren-download = { path = "../../crates/download" }

apps/desktop/src/commands.rs

@@ -19,6 +19,7 @@ pub struct AppInfo {
     pub version: String,
     pub platform: String,
     pub models_dir: String,
+    pub logs_dir: String,
     pub engine_bin: Option<String>,
     pub engine_exists: bool,
     pub db_path: String,
@@ -133,6 +134,7 @@ pub fn app_info(state: State<'_, App>) -> AppInfo {
         version: env!("CARGO_PKG_VERSION").to_string(),
         platform: std::env::consts::OS.to_string(),
         models_dir: state.core.models_dir.to_string_lossy().to_string(),
+        logs_dir: state.core.logs_dir.to_string_lossy().to_string(),
         engine_exists: engine_bin
             .as_ref()
             .is_some_and(|p| PathBuf::from(p).exists()),
@@ -1416,3 +1418,10 @@ pub async fn server_status(state: State<'_, App>) -> Result<serde_json::Value, S
 pub fn open_path(path: String) -> Result<(), String> {
     tauri_plugin_opener::open_path(path, None::<&str>).map_err(|e| e.to_string())
 }
+
+/// 前端上报运行时错误：写入本地日志便于排查。
+#[tauri::command]
+pub fn report_error(source: String, message: String) -> Result<(), String> {
+    tracing::error!(source = %source, error = %message, "frontend reported error");
+    Ok(())
+}

apps/desktop/src/lib.rs

@@ -17,11 +17,20 @@ pub struct App {
 }
 
 pub fn run() {
+    let data_dir = dirs::data_dir()
+        .unwrap_or_else(|| PathBuf::from("."))
+        .join("XianrenStudio");
+    let logs_dir = data_dir.join("logs");
+    let _ = std::fs::create_dir_all(&logs_dir);
+    let file_appender = tracing_appender::rolling::daily(&logs_dir, "app.log");
+    let (non_blocking, _guard) = tracing_appender::non_blocking(file_appender);
     tracing_subscriber::fmt()
         .with_env_filter(
             tracing_subscriber::EnvFilter::try_from_default_env()
                 .unwrap_or_else(|_| "info".into()),
         )
+        .with_writer(non_blocking)
+        .with_ansi(false)
         .init();
 
     tauri::Builder::default()
@@ -115,6 +124,7 @@ pub fn run() {
             commands::edit_message,
             commands::list_message_versions,
             commands::apply_message_version,
+            commands::report_error,
             commands::download_enqueue,
             commands::server_start,
             commands::server_stop,