cli: report missing CurseForge credentials during add

Signed-off-by: NotAShelf <raf@notashelf.dev>
Change-Id: I0c8d1f20828e88a8fbc737db5a89f5d46a6a6964

src/cli/commands/add.rs

@@ -251,7 +251,18 @@ pub async fn execute(
 
   // Prompt for missing CurseForge credentials when needed
   if needs_curseforge(lockfile.target.as_ref()) && !skip_prompts {
-    let _ = ensure_curseforge_credentials().await;
+    match ensure_curseforge_credentials().await {
+      Ok(true) => {},
+      Ok(false) => {
+        log::warn!(
+          "CurseForge credentials not configured. CurseForge-only projects \
+           may not resolve."
+        );
+      },
+      Err(e) => {
+        log::warn!("Failed to set up CurseForge credentials: {e}");
+      },
+    }
   }
 
   // Load config if available