Remove artificial analysis-required gate from filter

The apply-filter IPC handler in the main process only uses FileHandler
and FilterConfig — it never reads analysisResult. The renderer guard
was an unfounded assumption. Filter now works immediately on any open
file without needing to run analysis first.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: ozgesolidkey

src/renderer/renderer.ts

@@ -10595,11 +10595,6 @@ async function applyFilter(providedConfig?: FilterConfig): Promise<void> {
     };
   }
 
-  if (!state.analysisResult) {
-    alert('Please run analysis first before applying filters.');
-    return;
-  }
-
   showProgress('Applying filter...');
 
   // Listen for progress updates from the main process