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

@@ -154,21 +154,21 @@ export default function TodosPage() {
         </div>
 
         {/* Category filter bar (All + Completed + Categories with drag) */}
-        <CategoryFilterBar
-          activeFilters={activeFilters}
-          pinnedLabel="Completed"
-          showPinned={showCompleted}
-          categories={orderedCategories}
-          onToggleAll={toggleAll}
-          onTogglePinned={toggleCompleted}
-          onToggleCategory={toggleCategory}
-          onSelectAllCategories={selectAllCategories}
-          onReorderCategories={reorderCategories}
-          searchValue={search}
-          onSearchChange={setSearch}
-        />
-
-        <div className="flex-1" />
+        <div className="flex-1 min-w-0">
+          <CategoryFilterBar
+            activeFilters={activeFilters}
+            pinnedLabel="Completed"
+            showPinned={showCompleted}
+            categories={orderedCategories}
+            onToggleAll={toggleAll}
+            onTogglePinned={toggleCompleted}
+            onToggleCategory={toggleCategory}
+            onSelectAllCategories={selectAllCategories}
+            onReorderCategories={reorderCategories}
+            searchValue={search}
+            onSearchChange={setSearch}
+          />
+        </div>
 
         <Button onClick={handleCreateNew} size="sm">
           <Plus className="mr-2 h-4 w-4" />