Fix Todo search alignment: wrap CategoryFilterBar in flex-1 container

CategoryFilterBar's internal flex-1 spacer needs room to push search
right. Wrapping in flex-1 min-w-0 matches the Locations/People pattern.

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

frontend/src/components/todos/TodosPage.tsx

@@ -154,6 +154,7 @@ export default function TodosPage() {
         </div>
 
         {/* Category filter bar (All + Completed + Categories with drag) */}
+        <div className="flex-1 min-w-0">
           <CategoryFilterBar
             activeFilters={activeFilters}
             pinnedLabel="Completed"
@@ -167,8 +168,7 @@ export default function TodosPage() {
             searchValue={search}
             onSearchChange={setSearch}
           />
-
-        <div className="flex-1" />
+        </div>
 
         <Button onClick={handleCreateNew} size="sm">
           <Plus className="mr-2 h-4 w-4" />