Improve error handling robustness and user feedback

Co-authored-by: Byron <[email protected]>

Author: Copilot

apps/desktop/src/routes/[projectId]/+layout.svelte

@@ -340,7 +340,7 @@ import { getUserErrorCode, Code } from '$lib/backend/ipc';
 									dismiss();
 									showToast({
 										title: 'Repository Initialized',
-										message: 'Git repository has been initialized successfully. Retrying...',
+										message: `Git repository has been successfully initialized at ${currentProject.path}. Loading project...`,
 										style: 'info'
 									});
 									// Retry setting the project active

crates/gitbutler-tauri/src/projects.rs

@@ -69,9 +69,13 @@ pub fn set_project_active(
             let err = anyhow::Error::from(err);
             if code == git2::ErrorCode::Owner {
                 err.context(gitbutler_error::error::Code::RepoOwnership)
-            } else if code == git2::ErrorCode::NotFound {
-                // When git2::Repository::open fails with NotFound, it likely means the directory
-                // is not a git repository, so we attach our custom error code.
+            } else if code == git2::ErrorCode::NotFound || 
+                      code == git2::ErrorCode::Invalid ||
+                      code == git2::ErrorCode::Config {
+                // Common error codes when a directory is not a git repository:
+                // - NotFound: .git directory or repository not found
+                // - Invalid: Invalid repository structure
+                // - Config: Repository configuration issues
                 err.context(gitbutler_error::error::Code::NonGitRepository)
             } else {
                 err
@@ -223,7 +227,7 @@ Ensure these aren't touched by GitButler or avoid using it in this repository.",
 pub fn init_git_repository(path: String) -> Result<(), Error> {
     let repo_path = std::path::Path::new(&path);
 
-    // Check if path exists and is a directory
+    // Validate path
     if !repo_path.exists() {
         return Err(anyhow::anyhow!("Path does not exist: {}", path).into());
     }
@@ -236,6 +240,14 @@ pub fn init_git_repository(path: String) -> Result<(), Error> {
         return Err(anyhow::anyhow!("Directory is already a Git repository").into());
     }
 
+    // Check if directory is writable
+    let temp_file = repo_path.join(".gitbutler_write_test");
+    if let Err(_) = std::fs::write(&temp_file, "test") {
+        return Err(anyhow::anyhow!("Directory is not writable: {}", path).into());
+    }
+    // Clean up test file
+    let _ = std::fs::remove_file(&temp_file);
+    
     // Initialize the repository
     git2::Repository::init(repo_path)
         .with_context(|| format!("Failed to initialize Git repository at {}", path))?;