Decouple core Yaak logic from Tauri (#354)

crates/yaak-http/src/proto.rs

@@ -0,0 +1,29 @@
+use reqwest::Url;
+use std::str::FromStr;
+
+pub(crate) fn ensure_proto(url_str: &str) -> String {
+    if url_str.is_empty() {
+        return "".to_string();
+    }
+
+    if url_str.starts_with("http://") || url_str.starts_with("https://") {
+        return url_str.to_string();
+    }
+
+    // Url::from_str will fail without a proto, so add one
+    let parseable_url = format!("http://{}", url_str);
+    if let Ok(u) = Url::from_str(parseable_url.as_str()) {
+        match u.host() {
+            Some(host) => {
+                let h = host.to_string();
+                // These TLDs force HTTPS
+                if h.ends_with(".app") || h.ends_with(".dev") || h.ends_with(".page") {
+                    return format!("https://{url_str}");
+                }
+            }
+            None => {}
+        }
+    }
+
+    format!("http://{url_str}")
+}