feat: add startup diagnostics for environment issues

- Log HOME, PATH, XDG_DATA_HOME at startup
- Warn when critical env vars are missing
- Log item count per provider after refresh

This helps diagnose why items may not load when launched
from window manager keybinds vs terminal.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/main.rs

@@ -8,7 +8,7 @@ mod ui;
 
 use app::OwlryApp;
 use cli::CliArgs;
-use log::info;
+use log::{info, warn};
 
 fn main() {
     env_logger::Builder::from_env(env_logger::Env::default().default_filter_or("info")).init();
@@ -17,6 +17,18 @@ fn main() {
 
     info!("Starting Owlry launcher");
 
+    // Diagnostic: log critical environment variables
+    let home = std::env::var("HOME").unwrap_or_else(|_| "<not set>".to_string());
+    let path = std::env::var("PATH").unwrap_or_else(|_| "<not set>".to_string());
+    let xdg_data = std::env::var("XDG_DATA_HOME").unwrap_or_else(|_| "<not set>".to_string());
+    info!("HOME={}", home);
+    info!("PATH={}", path);
+    info!("XDG_DATA_HOME={}", xdg_data);
+
+    if home == "<not set>" || path == "<not set>" {
+        warn!("Critical environment variables missing! Items may not load correctly.");
+    }
+
     let app = OwlryApp::new(args);
     std::process::exit(app.run());
 }

src/providers/mod.rs

@@ -10,6 +10,7 @@ pub use uuctl::UuctlProvider;
 
 use fuzzy_matcher::FuzzyMatcher;
 use fuzzy_matcher::skim::SkimMatcherV2;
+use log::info;
 
 /// Represents a single searchable/launchable item
 #[derive(Debug, Clone)]
@@ -110,6 +111,11 @@ impl ProviderManager {
     pub fn refresh_all(&mut self) {
         for provider in &mut self.providers {
             provider.refresh();
+            info!(
+                "Provider '{}' loaded {} items",
+                provider.name(),
+                provider.items().len()
+            );
         }
     }