Enhance newsletter generation and dashboard functionality

- Introduce a new period selection feature in the dashboard for generating newsletters, allowing users to choose between "last month" and "last X days."
- Refactor newsletter generation logic to support filtering by article type (new, edited, or all) and improve the handling of filters in the dashboard.
- Update the dashboard template to include new input fields for period and article type, enhancing user experience.
- Improve CSS styles for send notifications and sections in the dashboard, providing clearer feedback on newsletter sending status.

app/services/wiki.py

@@ -19,11 +19,18 @@ class WikiService:
     def __init__(self) -> None:
         self.api_url = settings.wiki_api_url
 
-    async def get_recent_changes(self, days: int = 30, only_edited: bool = False) -> list[dict[str, Any]]:
-        now = datetime.now(timezone.utc)
-        start = now - timedelta(days=days)
-        rcstart = now.strftime("%Y-%m-%dT%H:%M:%SZ")
-        rcend = start.strftime("%Y-%m-%dT%H:%M:%SZ")
+    async def get_recent_changes(
+        self,
+        days: int = 30,
+        article_type: str = "all",
+        start: datetime | None = None,
+        end: datetime | None = None,
+    ) -> list[dict[str, Any]]:
+        # MediaWiki listet neueste Änderungen zuerst: rcstart = obere (neuere) Grenze, rcend = untere (ältere).
+        upper = end or datetime.now(timezone.utc)
+        lower = start or (upper - timedelta(days=days))
+        rcstart = upper.strftime("%Y-%m-%dT%H:%M:%SZ")
+        rcend = lower.strftime("%Y-%m-%dT%H:%M:%SZ")
 
         params: dict[str, str] = {
             "action": "query",
@@ -35,7 +42,9 @@ class WikiService:
             "rcend": rcend,
             "rcnamespace": "0",
         }
-        if only_edited:
+        if article_type == "new":
+            params["rctype"] = "new"
+        elif article_type == "edited":
             params["rctype"] = "edit"
         else:
             params["rctype"] = "new|edit"