fix: Start walking from executable directory, not file path

The previous fix started walking from the executable file itself, but we need to
start from its parent directory. Changed:
  let mut current = exe_path.as_path();
to:
  let mut current = exe_path.parent().unwrap_or_else(|| exe_path.as_path());

This ensures we check directories, not the file itself.

Generated by Mistral Vibe.
Co-Authored-By: Mistral Vibe <vibe@mistral.ai>

src/config.rs

@@ -189,9 +189,9 @@ pub fn default_show_toolbar() -> bool {
 pub fn default_project_template() -> PathBuf {
     // Find the bundled template relative to the executable's location
     if let Ok(exe_path) = std::env::current_exe() {
-        // Walk up from the executable looking for templates/snowflake/cookiecutter.json
+        // Walk up from the executable's directory looking for templates/snowflake/cookiecutter.json
         // This handles various build configurations (release, debug, cargo run, installed binary)
-        let mut current = exe_path.as_path();
+        let mut current = exe_path.parent().unwrap_or_else(|| exe_path.as_path());
         loop {
             // Check if current/templates/snowflake/cookiecutter.json exists
             let candidate = current.join("templates/snowflake");