refactor(search): remove smart mode from SearchFilterBar

Removes SmartModeToggle component import and all smart-mode conditional logic from SearchFilterBar, including mode-specific input handling, max-length constraints, and CSS class toggling. Removes associated smart-mode tests that verified chip lifecycle callbacks (onModeToggle, onSmartSearch).

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

frontend/src/routes/SearchFilterBar.svelte

@@ -3,7 +3,6 @@ import PersonTypeahead from '$lib/person/PersonTypeahead.svelte';
 import TagInput from '$lib/tag/TagInput.svelte';
 import DateInput from '$lib/shared/primitives/DateInput.svelte';
 import SortDropdown from '$lib/shared/primitives/SortDropdown.svelte';
-import SmartModeToggle from './search/SmartModeToggle.svelte';
 import { slide } from 'svelte/transition';
 import { m } from '$lib/paraglide/messages.js';
 
@@ -21,15 +20,12 @@ let {
 	sort = $bindable('DATE'),
 	dir = $bindable('desc'),
 	showAdvanced = $bindable(false),
-	smartMode = $bindable(false),
 	initialSenderName = '',
 	initialReceiverName = '',
 	navKey = 0,
 	isLoading = false,
 	onSearch,
 	onSearchImmediate,
-	onSmartSearch,
-	onModeToggle,
 	onfocus,
 	onblur
 }: {
@@ -46,28 +42,16 @@ let {
 	sort?: string;
 	dir?: string;
 	showAdvanced?: boolean;
-	smartMode?: boolean;
 	initialSenderName?: string;
 	initialReceiverName?: string;
 	navKey?: number;
 	isLoading?: boolean;
 	onSearch: () => void;
 	onSearchImmediate?: () => void;
-	onSmartSearch?: () => void;
-	onModeToggle?: () => void;
 	onfocus?: () => void;
 	onblur?: () => void;
 } = $props();
 
-// In smart mode the keyword search must not fire on every keystroke — the NL
-// query is submitted only on Enter (or an explicit button click).
-function onSearchKeydown(event: KeyboardEvent) {
-	if (smartMode && event.key === 'Enter') {
-		event.preventDefault();
-		onSmartSearch?.();
-	}
-}
-
 // Plain (non-reactive) flag — not $state, so no reactive assignment inside $effect
 let sortDirMounted = false;
 
@@ -92,19 +76,13 @@ $effect(() => {
 			<input
 				type="text"
 				bind:value={q}
-				oninput={smartMode ? undefined : onSearch}
-				onkeydown={onSearchKeydown}
+				oninput={onSearch}
 				onfocus={onfocus}
 				onblur={onblur}
-				maxlength={smartMode ? 500 : undefined}
 				aria-label={m.docs_search_placeholder()}
 				placeholder={m.docs_search_placeholder()}
-				class="block w-full border-line py-2.5 pl-10 placeholder-ink-3 shadow-sm focus:outline-none focus-visible:ring-2 focus-visible:ring-focus-ring {smartMode
-					? 'pr-28'
-					: 'pr-20'}"
+				class="block w-full border-line py-2.5 pr-20 pl-10 placeholder-ink-3 shadow-sm focus:outline-none focus-visible:ring-2 focus-visible:ring-focus-ring"
 			/>
-			<!-- Decorative search icon / loading spinner — left slot keeps the right
-			     slot free for the always-visible smart-mode toggle pill. -->
 			<div class="pointer-events-none absolute inset-y-0 left-0 flex items-center pl-3">
 				{#if isLoading}
 					<svg
@@ -132,7 +110,6 @@ $effect(() => {
 					/>
 				{/if}
 			</div>
-			<SmartModeToggle bind:smartMode={smartMode} onToggle={onModeToggle} />
 		</div>
 
 		<!-- Sort Dropdown -->

frontend/src/routes/SearchFilterBar.svelte.spec.ts

@@ -195,39 +195,3 @@ describe('SearchFilterBar – tagQ live filter', () => {
 		vi.unstubAllGlobals();
 	});
 });
-
-describe('SearchFilterBar – smart-mode chip lifecycle hooks', () => {
-	// The interpretation chips live in the result area (parent page). SearchFilterBar
-	// drives chip-clearing through callbacks: onModeToggle (mode switch) and
-	// onSmartSearch (new query). These tests pin that contract.
-	it('invokes onModeToggle when toggling back to keyword mode (parent clears chips)', async () => {
-		const onModeToggle = vi.fn();
-		render(SearchFilterBar, {
-			...defaultProps,
-			sort: 'DATE',
-			dir: 'desc',
-			smartMode: true,
-			onModeToggle
-		});
-		await page.getByRole('button', { name: /Smart/ }).click();
-		expect(onModeToggle).toHaveBeenCalledOnce();
-	});
-
-	it('invokes onSmartSearch when a new query is submitted in smart mode (parent resets chips)', async () => {
-		const onSmartSearch = vi.fn();
-		render(SearchFilterBar, {
-			...defaultProps,
-			sort: 'DATE',
-			dir: 'desc',
-			smartMode: true,
-			onSmartSearch
-		});
-		const input = page.getByPlaceholder('Titel, Personen, Tags durchsuchen…');
-		await input.fill('Walter im Krieg');
-		await input.click();
-		(document.activeElement as HTMLElement).dispatchEvent(
-			new KeyboardEvent('keydown', { key: 'Enter', bubbles: true })
-		);
-		await vi.waitFor(() => expect(onSmartSearch).toHaveBeenCalled());
-	});
-});