fix: enforce recent files limit when maxItems setting changes

The limit was only applied on file-open and plugin load, not when the user
changed the maxItems setting in the settings tab. Now enforceRecentFilesLimit()
is called on every settings change via the onSettingsChange callback.

src/main.ts

@@ -43,7 +43,10 @@ export default class WaypointPlugin extends Plugin {
 			this.app,
 			this,
 			this.settings,
-			() => this.redrawAll(),
+			() => {
+				this.enforceRecentFilesLimit();
+				this.redrawAll();
+			},
 		));
 
 		// ── Commands ──
@@ -219,6 +222,17 @@ export default class WaypointPlugin extends Plugin {
 		}
 	}
 
+	/**
+	 * Trim recent files to the current maxItems limit and persist.
+	 * Called when the maxItems setting changes.
+	 */
+	enforceRecentFilesLimit(): void {
+		if (this.recentFiles.length > this.settings.recentFiles.maxItems) {
+			this.recentFiles = this.recentFiles.slice(0, this.settings.recentFiles.maxItems);
+			this.persistRecentFiles();
+		}
+	}
+
 	async saveWaypointData(): Promise<void> {
 		// Sync recentFiles into waypointData before saving
 		this.waypointData.recentFiles = this.recentFiles;