feat: enhanced search filters (#2398)

* advanced search filters

* improve labelId filtering in query

* index label ids on typesense

* index label ids on typesense

* filters on AI search

* refactor: detect typesense schema drift from the declared collection schema

* feat: show secondary search filters only when applied

Created by and Labels now stay hidden until they hold a value; a Filter
button at the right end of the bar lists the hidden ones and opens the
picked filter's dropdown immediately.

* fix: keep applied search filters in the order they were added

* feat: add title-only search mode

Adds a titleOnly flag to page search: the Postgres driver matches
titles via trigram-indexed unaccented LIKE ranked by word_similarity,
and a Match filter in the search spotlight switches between everything
and title-only matching.

* refactor: make title-only search a toggle chip

* fix: drop stale results when the search content type changes

* feat: add trigram index on attachment file names

* feat: extend title-only search to attachments

The titleOnly flag now matches attachment file names via the
separator-normalized trigram expression, and the toggle chip stays
available in attachment mode as File name only.

* refactor: keep the title-only label uniform across search modes

* feat: index txt attachments for content search

* feat: pin the current user at the top of the creator filter

* refactor: dim the you suffix in the creator filter

* feat: browse label-filtered pages without a query

Selecting labels now lists their pages newest-first before any text is
typed, on both the Postgres and Typesense drivers.

* fix: match any selected label instead of requiring all

* fix: use a gray spotlight selection instead of primary blue

* feat: include search results in the spotlight tab order

* feat: show last updated time on search results

* fix: stop empty-state flicker while the search query debounces

* feat: browse creator-filtered results without a query

Selecting a creator with an empty query now lists their pages (or
attachments in attachment mode) newest-first, with the same space and
page permission filtering as typed search.

* fix: show Untitled for pages without a title in search results

* quick page sharing fix

* minor search filter fixes

---------

Co-authored-by: Philipinho <16838612+Philipinho@users.noreply.github.com>

apps/server/src/core/search/search.service.ts

@@ -29,12 +29,36 @@ export class SearchService {
       workspaceId: string;
     },
   ): Promise<{ items: SearchResponseDto[] }> {
-    const { query } = searchParams;
+    const query = searchParams.query?.trim() ?? '';
+    const labelIds = [...new Set(searchParams.labelIds ?? [])];
+    // selected filters (labels, creator) are browsable without a query
+    const browseByFilters =
+      query.length < 1 &&
+      (labelIds.length > 0 || Boolean(searchParams.creatorId));
 
-    if (query.length < 1) {
+    if (query.length < 1 && !browseByFilters) {
       return { items: [] };
     }
-    const searchQuery = tsquery(query.trim() + '*');
+    const searchQuery = tsquery(query + '*');
+    const titleOnly = searchParams.titleOnly === true;
+    const titleQuery = query;
+    // escape LIKE wildcards; ranking keeps the raw query
+    const titleLikeQuery = query.replace(/[\\%_]/g, '\\$&');
+
+    const rankColumn = browseByFilters
+      ? sql<number>`0`.as('rank')
+      : titleOnly
+        ? sql<number>`word_similarity(lower(f_unaccent(${titleQuery})), lower(f_unaccent(pages.title)))`.as(
+            'rank',
+          )
+        : sql<number>`ts_rank(tsv, to_tsquery('english', f_unaccent(${searchQuery})))`.as(
+            'rank',
+          );
+    const highlightColumn = browseByFilters || titleOnly
+      ? sql<string>`''`.as('highlight')
+      : sql<string>`ts_headline('english', text_content, to_tsquery('english', f_unaccent(${searchQuery})),'MinWords=9, MaxWords=10, MaxFragments=3')`.as(
+          'highlight',
+        );
 
     let queryResults = this.db
       .selectFrom('pages')
@@ -47,23 +71,41 @@ export class SearchService {
         'creatorId',
         'createdAt',
         'updatedAt',
-        sql<number>`ts_rank(tsv, to_tsquery('english', f_unaccent(${searchQuery})))`.as(
-          'rank',
-        ),
-        sql<string>`ts_headline('english', text_content, to_tsquery('english', f_unaccent(${searchQuery})),'MinWords=9, MaxWords=10, MaxFragments=3')`.as(
-          'highlight',
-        ),
+        rankColumn,
+        highlightColumn,
       ])
-      .where(
-        'tsv',
-        '@@',
-        sql<string>`to_tsquery('english', f_unaccent(${searchQuery}))`,
+      .$if(!browseByFilters && !titleOnly, (qb) =>
+        qb.where(
+          'tsv',
+          '@@',
+          sql<string>`to_tsquery('english', f_unaccent(${searchQuery}))`,
+        ),
+      )
+      .$if(!browseByFilters && titleOnly, (qb) =>
+        qb.where((eb) =>
+          eb(
+            sql`lower(f_unaccent(pages.title))`,
+            'like',
+            sql`lower(f_unaccent(${`%${titleLikeQuery}%`}))`,
+          ),
+        ),
       )
       .$if(Boolean(searchParams.creatorId), (qb) =>
         qb.where('creatorId', '=', searchParams.creatorId),
       )
+      .$if(labelIds?.length > 0, (qb) =>
+        qb.where(
+          'id',
+          'in',
+          this.db
+            .selectFrom('pageLabels')
+            .select('pageId')
+            .where('labelId', 'in', labelIds),
+        ),
+      )
       .where('deletedAt', 'is', null)
-      .orderBy('rank', 'desc')
+      .$if(browseByFilters, (qb) => qb.orderBy('updatedAt', 'desc'))
+      .$if(!browseByFilters, (qb) => qb.orderBy('rank', 'desc'))
       .limit(searchParams.limit || 25)
       .offset(searchParams.offset || 0);
 
@@ -71,8 +113,7 @@ export class SearchService {
       queryResults = queryResults.select((eb) => this.pageRepo.withSpace(eb));
     }
 
-    if (searchParams.spaceId) {
-      // search by spaceId
+    if (searchParams.spaceId && opts.userId) {
       queryResults = queryResults.where('spaceId', '=', searchParams.spaceId);
     } else if (opts.userId && !searchParams.spaceId) {
       // only search spaces the user is a member of