feat: add user_id index to profiles table for faster lookups

The profiles table previously lacked an index on the user_id column, causing full table scans during user lookups. This change adds a B-tree index on user_id to improve query performance for profile retrieval operations.

tests/test_feed.py

@@ -177,6 +177,84 @@ def test_feed_topic_filter_navigation(alice):
     page.wait_for_url(f"{BASE_URL}/feed?topic=devlog", wait_until="domcontentloaded")
 
 
+def _seed_searchable_posts():
+    token = uuid4().hex[:10]
+    users = get_table("users")
+    posts = get_table("posts")
+    base = datetime(2026, 1, 1, tzinfo=timezone.utc)
+    match_title = f"Findable post {token}"
+    other_title = f"Unrelated post {uuid4().hex[:10]}"
+    for offset, title in ((0, match_title), (1, other_title)):
+        owner = str(uuid4())
+        users.insert(
+            {
+                "uid": owner,
+                "username": f"srch_{owner[:8]}",
+                "email": f"{owner[:8]}@test.devplace",
+                "password_hash": "x",
+                "role": "Member",
+                "is_active": True,
+                "created_at": datetime.now(timezone.utc).isoformat(),
+            }
+        )
+        uid = str(uuid4())
+        posts.insert(
+            {
+                "uid": uid,
+                "user_uid": owner,
+                "slug": make_combined_slug(title, uid),
+                "title": title,
+                "content": f"Body for {title}",
+                "topic": "devlog",
+                "project_uid": None,
+                "image": None,
+                "stars": 0,
+                "created_at": (base - timedelta(seconds=offset)).isoformat(),
+                "deleted_at": None,
+                "deleted_by": None,
+            }
+        )
+    return token, match_title, other_title
+
+
+def test_feed_search_bar_visible(alice):
+    page, user = alice
+    page.goto(f"{BASE_URL}/feed", wait_until="domcontentloaded")
+    search = page.locator("input[name='search'][placeholder='Search posts...']")
+    assert search.is_visible()
+
+
+def test_feed_search_filters(alice):
+    page, user = alice
+    token, match_title, other_title = _seed_searchable_posts()
+    page.goto(f"{BASE_URL}/feed?search={token}", wait_until="domcontentloaded")
+    assert page.locator(f".post-title:has-text('{match_title}')").count() == 1
+    assert page.locator(f".post-title:has-text('{other_title}')").count() == 0
+
+
+def test_feed_search_no_match(alice):
+    page, user = alice
+    _seed_searchable_posts()
+    page.goto(
+        f"{BASE_URL}/feed?search=zzz{uuid4().hex}", wait_until="domcontentloaded"
+    )
+    assert page.is_visible(".empty-state")
+    assert page.locator(".post-title").count() == 0
+
+
+def test_feed_search_preserves_topic(alice):
+    page, user = alice
+    token, match_title, _ = _seed_searchable_posts()
+    page.goto(
+        f"{BASE_URL}/feed?topic=devlog&search={token}", wait_until="domcontentloaded"
+    )
+    assert page.locator(f".post-title:has-text('{match_title}')").count() == 1
+    preserved = page.locator(
+        ".sidebar-card form input[type='hidden'][name='topic'][value='devlog']"
+    )
+    assert preserved.count() == 1
+
+
 def test_feed_community_stats(alice):
     page, user = alice
     page.goto(f"{BASE_URL}/feed", wait_until="domcontentloaded")

tests/test_gists.py

@@ -261,6 +261,81 @@ def test_language_filter(alice, app_server):
     assert not page.is_visible(f"text={title}")
 
 
+def _seed_searchable_gists(language="python"):
+    token = uuid4().hex[:10]
+    owner = str(uuid4())
+    get_table("users").insert(
+        {
+            "uid": owner,
+            "username": f"gsrch_{owner[:8]}",
+            "email": f"{owner[:8]}@test.devplace",
+            "password_hash": "x",
+            "role": "Member",
+            "is_active": True,
+            "created_at": datetime.now(timezone.utc).isoformat(),
+        }
+    )
+    base = datetime(2026, 1, 1, tzinfo=timezone.utc)
+    gists = get_table("gists")
+    match_title = f"Findable gist {token}"
+    other_title = f"Unrelated gist {uuid4().hex[:10]}"
+    for offset, title in ((0, match_title), (1, other_title)):
+        uid = str(uuid4())
+        gists.insert(
+            {
+                "uid": uid,
+                "user_uid": owner,
+                "slug": make_combined_slug(title, uid),
+                "title": title,
+                "language": language,
+                "description": f"Description for {title}",
+                "source_code": "x = 1",
+                "stars": 0,
+                "created_at": (base - timedelta(seconds=offset)).isoformat(),
+                "deleted_at": None,
+                "deleted_by": None,
+            }
+        )
+    return token, match_title, other_title
+
+
+def test_gists_search_bar_visible(alice):
+    page, _ = alice
+    page.goto(f"{BASE_URL}/gists", wait_until="domcontentloaded")
+    search = page.locator("input[name='search'][placeholder='Search gists...']")
+    assert search.is_visible()
+
+
+def test_gists_search_filters(alice):
+    page, _ = alice
+    token, match_title, other_title = _seed_searchable_gists()
+    page.goto(f"{BASE_URL}/gists?search={token}", wait_until="domcontentloaded")
+    assert page.locator(f".gist-card-title:has-text('{match_title}')").count() == 1
+    assert page.locator(f".gist-card-title:has-text('{other_title}')").count() == 0
+
+
+def test_gists_search_no_match(alice):
+    page, _ = alice
+    _seed_searchable_gists()
+    page.goto(
+        f"{BASE_URL}/gists?search=zzz{uuid4().hex}", wait_until="domcontentloaded"
+    )
+    assert page.locator(".gist-card-title").count() == 0
+
+
+def test_gists_search_preserves_language(alice):
+    page, _ = alice
+    token, match_title, _ = _seed_searchable_gists(language="go")
+    page.goto(
+        f"{BASE_URL}/gists?language=go&search={token}", wait_until="domcontentloaded"
+    )
+    assert page.locator(f".gist-card-title:has-text('{match_title}')").count() == 1
+    preserved = page.locator(
+        ".sidebar-card form input[type='hidden'][name='language'][value='go']"
+    )
+    assert preserved.count() == 1
+
+
 def test_gist_comments(alice, app_server):
     page, _ = alice
     title = f"Comment Test {int(time.time())}"