fix: desktop — use HOME instead of USERPROFILE on Linux for default vault path

desktop/src/main.rs

@@ -443,12 +443,15 @@ fn main() {
     // Load config for window state
     let mut config = load_config();
 
-    // First run: create default vault config
+    // First run: create sensible defaults per platform
     if config.vaults.is_empty() {
         info!("First run — creating default vault configuration");
-        let userprofile = std::env::var("USERPROFILE").unwrap_or_else(|_| "C:\\Users\\Default".to_string());
-        let vault_dir = std::path::PathBuf::from(&userprofile).join("voute_obsidian");
+        #[cfg(target_os = "windows")]
+        let home = std::env::var("USERPROFILE").unwrap_or_else(|_| "C:\\Users\\Default".to_string());
+        #[cfg(not(target_os = "windows"))]
+        let home = std::env::var("HOME").unwrap_or_else(|_| "/home/bruno".to_string());
 
+        let vault_dir = std::path::PathBuf::from(&home).join("voute_obsidian");
         // Create the vault directory if it doesn't exist
         if !vault_dir.exists() {
             if let Err(e) = fs::create_dir_all(&vault_dir) {
@@ -457,12 +460,8 @@ fn main() {
                 info!("Created default vault dir: {}", vault_dir.display());
             }
         }
-
         config.dirs = vec![
-            DirConfig {
-                name: "Bruno".to_string(),
-                path: userprofile.clone(),
-            },
+            DirConfig { name: "bruno".to_string(), path: home.clone() },
         ];
         config.vaults = vec![
             VaultConfig {
@@ -470,7 +469,7 @@ fn main() {
                 path: vault_dir.to_string_lossy().to_string(),
             },
         ];
-        config.vault_path = Some(userprofile);
+        config.vault_path = Some(home);
         save_config(&config);
         info!("Default vault config saved");
     }