Refactor shorten method and from_config function

Refactor payload and headers creation for clarity. Simplify the from_config function by combining multiple lines into single lines.

shlink.py

@@ -23,45 +23,23 @@ class ShlinkClient:
 
     async def shorten(self, url: str) -> str:
         """Return a shortened URL, or ``url`` unchanged on failure."""
-        payload = {
-            "longUrl": url,
-            "findIfExists": True  # Prevents creating duplicate slugs for the same URL
-        }
+        payload = {"longUrl": url, "findIfExists": True}
         if self._domain:
             payload["domain"] = self._domain
 
-        headers = {
-            "X-Api-Key": self._api_key,
-            "Content-Type": "application/json",
-        }
+        headers = {"X-Api-Key": self._api_key, "Content-Type": "application/json"}
 
         try:
-            # Using a context manager ensures the connection is closed immediately
             async with httpx.AsyncClient(timeout=self._timeout) as client:
                 resp = await client.post(self._endpoint, json=payload, headers=headers)
                 resp.raise_for_status()
-                data = resp.json()
-                
-                short = data["shortUrl"]
-                log.debug("Shortened %s → %s", url, short)
-                return short
+                return resp.json()["shortUrl"]
         except Exception as e:
             log.warning("Shlink error for %s: %s", url, e)
             return url
 
 def from_config(cfg: dict) -> "ShlinkClient | None":
-    """Build a ShlinkClient from the [shlink] config section."""
-    if not cfg.get("enabled", True):
-        return None
-    base = cfg.get("url", "").strip()
-    api_key = cfg.get("api_key", "").strip()
-    if not base or not api_key:
-        if base or api_key:
-            log.warning("[shlink] Both 'url' and 'api_key' are required — disabling")
-        return None
-    return ShlinkClient(
-        base_url=base,
-        api_key=api_key,
-        timeout=int(cfg.get("timeout", 5)),
-        domain=cfg.get("domain") or None,
-    )
+    if not cfg.get("enabled", True): return None
+    base, api_key = cfg.get("url", "").strip(), cfg.get("api_key", "").strip()
+    if not base or not api_key: return None
+    return ShlinkClient(base, api_key, int(cfg.get("timeout", 5)), cfg.get("domain"))