fix(pages_enabled): hide search UI and block all search routes when disabled

- Hide navbar search box when CONFIG.page_enabled?("search") is false
- Keep Invidious logo visible with proper width when search bar is hidden
- Hide search widget on search_homepage when search is disabled
- Block /results, /api/v1/search/suggestions in before_all guard
- Block /hashtag/* and /api/v1/hashtag/* when search is disabled

src/invidious/routes/before_all.cr

@@ -150,7 +150,9 @@ module Invidious::Routes::BeforeAll
                  "popular"
                when "/feed/trending", "/api/v1/trending"
                  "trending"
-               when "/search", "/api/v1/search"
+               when "/search", "/api/v1/search", "/api/v1/search/suggestions", "/results"
+                 "search"
+               when .starts_with?("/hashtag/"), .starts_with?("/api/v1/hashtag/")
                  "search"
                else
                  nil

src/invidious/views/search_homepage.ecr

@@ -12,9 +12,11 @@
     <div class="pure-u-1" id="logo">
         <h1 href="/" class="pure-menu-heading">Invidious</h1>
     </div>
+    <% if CONFIG.page_enabled?("search") %>
     <div class="pure-u-1-4"></div>
     <div class="pure-u-1 pure-u-md-12-24 searchbar">
         <% autofocus = true %><%= rendered "components/search_box" %>
     </div>
     <div class="pure-u-1-4"></div>
+    <% end %>
 </div>

src/invidious/views/template.ecr

@@ -31,13 +31,17 @@
     <div class="pure-g">
         <div class="pure-u-1 pure-u-xl-20-24" id="contents">
             <div class="pure-g navbar h-box">
-                <% if navbar_search %>
+                <% if navbar_search && CONFIG.page_enabled?("search") %>
                     <div class="pure-u-1 pure-u-md-4-24">
                         <a href="/" class="index-link pure-menu-heading">Invidious</a>
                     </div>
                     <div class="pure-u-1 pure-u-md-12-24 searchbar">
                         <% autofocus = false %><%= rendered "components/search_box" %>
                     </div>
+                <% elsif navbar_search %>
+                    <div class="pure-u-1 pure-u-md-16-24">
+                        <a href="/" class="index-link pure-menu-heading">Invidious</a>
+                    </div>
                 <% end %>
 
                 <div class="pure-u-1 pure-u-md-8-24 user-field">