Don't show 'next page' or 'previous page' where not applicable

src/invidious/views/channel.ecr

@@ -41,14 +41,14 @@
 
 <div class="pure-g h-box">
     <div class="pure-u-1 pure-u-md-1-5">
-    <% if page > 2 %>
+    <% if page >= 2 %>
         <a href="/channel/<%= ucid %>?page=<%= page - 1 %>">Previous page</a>
-    <% else %>
-        <a href="/channel/<%= ucid %>">Previous page</a>
     <% end %>
     </div>
     <div class="pure-u-1 pure-u-md-3-5"></div>
     <div style="text-align:right;" class="pure-u-1 pure-u-md-1-5">
+    <% if videos.size == 100 %>
         <a href="/channel/<%= ucid %>?page=<%= page + 1 %>">Next page</a>
+    <% end %>
     </div>
 </div>

src/invidious/views/search.ecr

@@ -12,10 +12,8 @@
 
 <div class="pure-g h-box">
     <div class="pure-u-1 pure-u-md-1-5">
-    <% if page > 2 %>
+    <% if page >= 2 %>
         <a href="/search?q=<%= query %>&page=<%= page - 1 %>">Previous page</a>
-    <% else %>
-        <a href="/search?q=<%= query %>">Previous page</a>
     <% end %>
     </div>
     <div class="pure-u-1 pure-u-md-3-5"></div>

src/invidious/views/subscriptions.ecr

@@ -38,14 +38,14 @@
 
 <div class="pure-g">
     <div class="pure-u-1 pure-u-md-1-5">
-    <% if page > 2 %>
+    <% if page >= 2 %>
         <a href="/feed/subscriptions?max_results=<%= max_results %>&page=<%= page - 1 %>">Previous page</a>
-    <% else %>
-        <a href="/feed/subscriptions?max_results=<%= max_results %>">Previous page</a>
     <% end %>
     </div>
     <div class="pure-u-1 pure-u-md-3-5"></div>
     <div style="text-align:right;" class="pure-u-1 pure-u-md-1-5">
-        <a href="/feed/subscriptions?max_results=<%= max_results %>&page=<%= page + 1 %>">Next page</a>
+        <% if (videos.size + notifications.size) == max_results %>
+            <a href="/feed/subscriptions?max_results=<%= max_results %>&page=<%= page + 1 %>">Next page</a>
+        <% end %>
     </div>
 </div>