Fix HistoryControls Select clear button requiring double click

Same fix as TaskControls: pass null instead of undefined to Mantine
Select value prop so the clear button disappears on first click.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

clients/web/src/components/groups/HistoryControls/HistoryControls.tsx

@@ -37,7 +37,7 @@ export function HistoryControls({
       <Select
         placeholder="All methods"
         data={METHOD_OPTIONS}
-        value={methodFilter}
+        value={methodFilter ?? null}
         onChange={(value) => onMethodFilterChange(value ?? "")}
         clearable
       />