fix(buttons): use inline-flex on all buttons so <a> and <button> render same height

<a> tags are display:inline by default and don't respect vertical padding,
while <button> is inline-block. Mixed anchor/button pairs (View/Add) rendered
at different heights despite identical padding. Apply display:inline-flex +
align-items:center to every button-styled element across SchoolRow, RankingsView,
and SchoolCard. Add border:1px solid transparent to borderless buttons so total
box size matches bordered siblings.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

nextjs-app/components/SchoolRow.module.css

@@ -129,6 +129,8 @@
 }
 
 .btnView {
+  display: inline-flex;
+  align-items: center;
   padding: 0.5rem 1rem;
   font-size: 0.875rem;
   font-weight: 500;
@@ -138,6 +140,7 @@
   text-decoration: none;
   transition: all 0.15s ease;
   white-space: nowrap;
+  box-sizing: border-box;
 }
 
 .btnView:hover {
@@ -147,16 +150,19 @@
 }
 
 .btnCompare {
+  display: inline-flex;
+  align-items: center;
   padding: 0.5rem 1rem;
   font-size: 0.875rem;
   font-weight: 600;
   color: white;
   background: var(--accent-coral, #e07256);
-  border: none;
+  border: 1px solid transparent;
   border-radius: 6px;
   cursor: pointer;
   transition: background 0.15s ease;
   white-space: nowrap;
+  box-sizing: border-box;
 }
 
 .btnCompare:hover {
@@ -164,6 +170,8 @@
 }
 
 .btnRemove {
+  display: inline-flex;
+  align-items: center;
   padding: 0.5rem 1rem;
   font-size: 0.875rem;
   font-weight: 500;
@@ -174,6 +182,7 @@
   cursor: pointer;
   transition: all 0.15s ease;
   white-space: nowrap;
+  box-sizing: border-box;
 }
 
 .btnRemove:hover {