feat: implement path normalization across commands

packages/desktop/src-tauri/src/path_utils.rs

@@ -0,0 +1,21 @@
+use std::path::PathBuf;
+
+pub fn expand_tilde_path(value: &str) -> PathBuf {
+    let trimmed = value.trim();
+    if trimmed.is_empty() {
+        return PathBuf::from(trimmed);
+    }
+
+    let home = dirs::home_dir().unwrap_or_else(|| PathBuf::from("/"));
+
+    if trimmed == "~" {
+        return home;
+    }
+
+    if trimmed.starts_with("~/") || trimmed.starts_with("~\\") {
+        return home.join(&trimmed[2..]);
+    }
+
+    PathBuf::from(trimmed)
+}
+