refactor(devgen/cli): reorder config merge to preserve key order

Preserves insertion order and prevents accidental overwriting of existing keys

devgen/cli/setup.py

@@ -86,13 +86,16 @@ def setup_config() -> None:
         ollama_host = ollama_host_input.strip() or ollama_host
 
     # Save Config — merge with existing to preserve extra keys
-    new_config = {**current_config, **{
-        "provider": provider,
-        "model": model,
-        "api_key": api_key,
-        "emoji": emoji,
-        "ollama_host": ollama_host,
-    }}
+    new_config = {
+        **current_config,
+        **{
+            "provider": provider,
+            "model": model,
+            "api_key": api_key,
+            "emoji": emoji,
+            "ollama_host": ollama_host,
+        },
+    }
 
     try:
         with config_path.open("w", encoding="utf-8") as f: