Add file-based logging to avoid TUI corruption from stderr output

Errors were only visible in the truncated status bar notification.
Add tracing-appender to write to data/sba-scout.log with env-filter
support (RUST_LOG), and add tracing::error! calls alongside all
notification-only error paths for full diagnostic visibility.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

rust/Cargo.lock

@@ -270,6 +270,15 @@ version = "2.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "19d374276b40fb8bbdee95aef7c7fa6b5316ec764510eb64b8dd0e2ed0d7e7f5"
 
+[[package]]
+name = "crossbeam-channel"
+version = "0.5.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "82b8f8f868b36967f9606790d1903570de9ceaf870a7bf9fbbd3016d636a2cb2"
+dependencies = [
+ "crossbeam-utils",
+]
+
 [[package]]
 name = "crossbeam-queue"
 version = "0.3.12"
@@ -1371,6 +1380,15 @@ dependencies = [
  "winapi",
 ]
 
+[[package]]
+name = "matchers"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d1525a2a28c7f4fa0fc98bb91ae755d1e2d1505079e05539e35bc876b5d65ae9"
+dependencies = [
+ "regex-automata",
+]
+
 [[package]]
 name = "md-5"
 version = "0.10.6"
@@ -2221,6 +2239,7 @@ dependencies = [
  "tokio",
  "toml",
  "tracing",
+ "tracing-appender",
  "tracing-subscriber",
 ]
 
@@ -2903,12 +2922,14 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "743bd48c283afc0388f9b8827b976905fb217ad9e647fae3a379a9283c4def2c"
 dependencies = [
  "deranged",
+ "itoa",
  "libc",
  "num-conv",
  "num_threads",
  "powerfmt",
  "serde_core",
  "time-core",
+ "time-macros",
 ]
 
 [[package]]
@@ -2917,6 +2938,16 @@ version = "0.1.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7694e1cfe791f8d31026952abf09c69ca6f6fa4e1a1229e18988f06a04a12dca"
 
+[[package]]
+name = "time-macros"
+version = "0.2.27"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2e70e4c5a0e0a8a4823ad65dfe1a6930e4f4d756dcd9dd7939022b5e8c501215"
+dependencies = [
+ "num-conv",
+ "time-core",
+]
+
 [[package]]
 name = "tinystr"
 version = "0.8.2"
@@ -3112,6 +3143,18 @@ dependencies = [
  "tracing-core",
 ]
 
+[[package]]
+name = "tracing-appender"
+version = "0.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "786d480bce6247ab75f005b14ae1624ad978d3029d9113f0a22fa1ac773faeaf"
+dependencies = [
+ "crossbeam-channel",
+ "thiserror 2.0.18",
+ "time",
+ "tracing-subscriber",
+]
+
 [[package]]
 name = "tracing-attributes"
 version = "0.1.31"
@@ -3150,10 +3193,14 @@ version = "0.3.22"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2f30143827ddab0d256fd843b7a66d164e9f271cfa0dde49142c5ca0ca291f1e"
 dependencies = [
+ "matchers",
  "nu-ansi-term",
+ "once_cell",
+ "regex-automata",
  "sharded-slab",
  "smallvec",
  "thread_local",
+ "tracing",
  "tracing-core",
  "tracing-log",
 ]

rust/Cargo.toml

@@ -31,7 +31,8 @@ thiserror = "2"
 
 # Logging
 tracing = "0.1"
-tracing-subscriber = "0.3"
+tracing-subscriber = { version = "0.3", features = ["env-filter"] }
+tracing-appender = "0.2"
 
 # Date/time
 chrono = { version = "0.4", features = ["serde"] }

rust/src/main.rs

@@ -5,11 +5,27 @@ use ratatui::DefaultTerminal;
 use sqlx::sqlite::SqlitePool;
 use tokio::sync::mpsc;
 use tokio::time::{interval, Duration};
+use tracing_appender::non_blocking::WorkerGuard;
+use tracing_subscriber::EnvFilter;
 
 use sba_scout::app::{App, AppMessage};
 use sba_scout::config;
 use sba_scout::db;
 
+fn init_logging(log_dir: &std::path::Path) -> WorkerGuard {
+    std::fs::create_dir_all(log_dir).ok();
+    let file_appender = tracing_appender::rolling::never(log_dir, "sba-scout.log");
+    let (non_blocking, guard) = tracing_appender::non_blocking(file_appender);
+    tracing_subscriber::fmt()
+        .with_writer(non_blocking)
+        .with_env_filter(
+            EnvFilter::try_from_default_env().unwrap_or_else(|_| EnvFilter::new("info")),
+        )
+        .with_ansi(false)
+        .init();
+    guard
+}
+
 #[tokio::main]
 async fn main() -> Result<()> {
     let settings = match config::load_settings() {
@@ -20,6 +36,9 @@ async fn main() -> Result<()> {
         }
     };
 
+    let log_dir = settings.db_path.parent().unwrap_or(std::path::Path::new("data"));
+    let _log_guard = init_logging(log_dir);
+
     if let Some(parent) = settings.db_path.parent() {
         std::fs::create_dir_all(parent)?;
     }

rust/src/screens/dashboard.rs

@@ -56,6 +56,7 @@ impl DashboardState {
                     let _ = tx.send(AppMessage::RosterLoaded(roster));
                 }
                 Err(e) => {
+                    tracing::error!("Failed to load roster: {e}");
                     let _ = tx.send(AppMessage::Notify(
                         format!("Failed to load roster: {e}"),
                         NotifyLevel::Error,
@@ -119,6 +120,7 @@ impl DashboardState {
                     );
                 }
                 Err(e) => {
+                    tracing::error!("Sync failed: {e}");
                     self.sync_state = SyncState::Error;
                     self.sync_message = format!("Sync failed: {e}");
                 }

rust/src/screens/gameday.rs

@@ -157,6 +157,7 @@ impl GamedayState {
                     let _ = tx_c.send(AppMessage::TeamsLoaded(teams));
                 }
                 Err(e) => {
+                    tracing::error!("Failed to load teams: {e}");
                     let _ = tx_c.send(AppMessage::Notify(
                         format!("Failed to load teams: {e}"),
                         NotifyLevel::Error,
@@ -620,6 +621,7 @@ impl GamedayState {
                     let _ = tx.send(AppMessage::PitchersLoaded(pitchers));
                 }
                 Err(e) => {
+                    tracing::error!("Failed to load pitchers: {e}");
                     let _ = tx.send(AppMessage::Notify(
                         format!("Failed to load pitchers: {e}"),
                         NotifyLevel::Error,
@@ -661,6 +663,7 @@ impl GamedayState {
                     let _ = tx.send(AppMessage::MatchupsCalculated(results));
                 }
                 Err(e) => {
+                    tracing::error!("Matchup calculation failed: {e}");
                     let _ = tx.send(AppMessage::Notify(
                         format!("Matchup calculation failed: {e}"),
                         NotifyLevel::Error,