feat: merge people search into the recipe search bar on Explore

People search existed but was buried in its own tab with no entry
point from anywhere else — easy to conclude it "doesn't work" since
nobody would find it. Now one query on Explore hits both
/api/v1/search and /api/v1/users/search and renders People/Recipes
sections together; the standalone people tab and its now-dead
PeopleSearch component are gone.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

apps/web/messages/en.json

@@ -438,11 +438,7 @@
     "dismissAiScaling": "Dismiss AI scaling"
   },
   "people": {
-    "title": "Find People",
-    "subtitle": "Search for cooks to follow by name or username.",
-    "searchPlaceholder": "Search people by name or username…",
-    "searching": "Searching…",
-    "noneFound": "No one found."
+    "searching": "Searching…"
   },
   "messages": {
     "loading": "Loading…",
@@ -497,15 +493,15 @@
   },
   "explore": {
     "title": "Explore",
-    "tabRecipes": "Recipes",
-    "tabPeople": "People",
-    "searchPlaceholder": "Search public recipes…",
+    "searchPlaceholder": "Search recipes and people…",
+    "peopleHeading": "People",
+    "recipesHeading": "Recipes",
     "maxMinutes": "Max minutes",
     "aiSearchPlaceholder": "e.g. quick weeknight dinners, Italian comfort food…",
     "anyDifficulty": "Any difficulty",
     "resultsFoundSingular": "{count} recipe found",
     "resultsFoundPlural": "{count} recipes found",
-    "noResultsTitle": "No recipes found for “{query}”",
+    "noResultsTitle": "No results for “{query}”",
     "noResultsHint": "Try different keywords or remove filters",
     "loadMore": "Load more",
     "recipeIdeas": "Recipe ideas",