Feedback: space/bottom-align Send button; submit No + comment as one row

Comment area is now a flex row that bottom-aligns the Send button with a 16px gap. The No vote is held until the comment is sent so both land on one Google Form row; a No left without a comment is still recorded once via sendBeacon on page-leave.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

css/pages/_guide.css

@@ -511,16 +511,20 @@
 .guide-feedback-comment {
     flex-basis: 100%;
     margin-top: 4px;
+    display: flex;
+    flex-wrap: wrap;
+    align-items: flex-end;
+    gap: 16px;
 }
 .guide-feedback-comment-label {
-    display: block;
-    margin-bottom: 6px;
+    flex-basis: 100%;
+    margin: 0;
     font-size: 14px;
     font-weight: 600;
     color: #344054;
 }
 .guide-feedback-comment-input {
-    width: 100%;
+    flex: 1 1 300px;
     max-width: 520px;
     padding: 10px 12px;
     border: 1.5px solid #D0D5DD;
@@ -535,9 +539,9 @@
     box-shadow: 0 0 0 3px rgba(115, 96, 242, .15);
 }
 .guide-feedback-comment-send {
-    display: inline-block;
-    margin-top: 8px;
-    padding: 8px 20px;
+    flex: 0 0 auto;
+    margin: 0;
+    padding: 11px 24px;
     border: none;
     border-radius: 8px;
     background: #7360F2;
@@ -557,7 +561,8 @@
     transform: none;
 }
 .guide-feedback-comment-thanks {
-    margin: 8px 0 0;
+    flex-basis: 100%;
+    margin: 0;
     color: #12B76A;
     font-weight: 600;
 }