Add search feature to calendar app with / keybinding using khal search

src/services/khal/client.py

@@ -330,3 +330,44 @@ class KhalClient(CalendarBackend):
         # khal edit is interactive, so this is limited via CLI
         logger.warning("update_event not fully implemented for khal CLI")
         return None
+
+    def search_events(self, query: str) -> List[Event]:
+        """Search for events matching a query string.
+
+        Args:
+            query: Search string to match against event titles and descriptions
+
+        Returns:
+            List of matching events
+        """
+        if not query:
+            return []
+
+        # Use khal search with custom format
+        format_str = "{title}|{start-time}|{end-time}|{start}|{end}|{location}|{uid}|{description}|{organizer}|{url}|{categories}|{status}|{repeat-symbol}"
+        args = ["search", "-f", format_str, query]
+
+        result = self._run_khal(args)
+
+        if result.returncode != 0:
+            logger.error(f"khal search failed: {result.stderr}")
+            return []
+
+        events = []
+        for line in result.stdout.strip().split("\n"):
+            line = line.strip()
+            if not line:
+                continue
+
+            # Skip day headers
+            if ", " in line and "|" not in line:
+                continue
+
+            event = self._parse_event_line(line)
+            if event:
+                events.append(event)
+
+        # Sort by start time
+        events.sort(key=lambda e: e.start)
+
+        return events