Implement repository management view and multi-repo tabs

Introduces a new "Repository Management" view for browsing open and recent repositories. Adds a tabbed interface for quickly switching between multiple active repositories, with persistent state. Also includes a new command to open the current repository in the native file explorer.

src-tauri/src/git.rs

@@ -208,6 +208,12 @@ pub fn open_repository(path: String) -> Result<GitStatus, String> {
     status_for_repo(&repo)
 }
 
+#[tauri::command]
+pub fn open_repo_in_explorer(path: String) -> Result<(), String> {
+    let repo = resolve_repo(&path)?;
+    open_path_in_file_manager(&repo)
+}
+
 #[derive(Debug, Clone, Serialize)]
 pub struct RepositoryBundle {
     pub status: GitStatus,
@@ -1314,6 +1320,36 @@ fn resolve_repo(path: &str) -> Result<PathBuf, String> {
     Ok(PathBuf::from(top_level))
 }
 
+#[cfg(windows)]
+fn open_path_in_file_manager(path: &Path) -> Result<(), String> {
+    let native_path = path.to_string_lossy().replace('/', "\\");
+    let mut command = Command::new("explorer.exe");
+    command.arg(native_path);
+    command.creation_flags(CREATE_NO_WINDOW);
+    command
+        .spawn()
+        .map_err(|err| format!("Explorer konnte nicht gestartet werden: {err}"))?;
+    Ok(())
+}
+
+#[cfg(target_os = "macos")]
+fn open_path_in_file_manager(path: &Path) -> Result<(), String> {
+    Command::new("open")
+        .arg(path)
+        .spawn()
+        .map_err(|err| format!("Finder konnte nicht gestartet werden: {err}"))?;
+    Ok(())
+}
+
+#[cfg(all(unix, not(target_os = "macos")))]
+fn open_path_in_file_manager(path: &Path) -> Result<(), String> {
+    Command::new("xdg-open")
+        .arg(path)
+        .spawn()
+        .map_err(|err| format!("Dateimanager konnte nicht gestartet werden: {err}"))?;
+    Ok(())
+}
+
 fn verify_commit(repo: &Path, commit: &str) -> Result<String, String> {
     let commit = commit.trim();
     if commit.is_empty() {