Enter asks, Ctrl+Enter breaks the line — in both chat modes

Almost every message here is one line, so the common action takes the bare key. Shift+Enter also breaks a line, because that is the reflex people arrive with.

Plugin/unraid/include/ai_chat.php

@@ -2028,7 +2028,19 @@ vv_ai_profiles_script();
       wrapEl.addEventListener('keydown', e => {
         const inp = $('input');
 
-        if (e.key === 'Enter' && (e.ctrlKey || e.metaKey)) { e.preventDefault(); send(); return; }
+        // Enter asks; Ctrl/Cmd+Enter breaks the line. The reverse of the usual editor convention,
+        // and right for this box: almost every message here is one line, so the common action
+        // gets the bare key and the rare one gets the modifier. Shift+Enter also breaks a line,
+        // because that is the reflex people arrive with from every other chat box.
+        if (e.key === 'Enter' && (e.ctrlKey || e.metaKey)) {
+          e.preventDefault();
+          const t = e.target;
+          const s = t.selectionStart ?? t.value.length, n = t.selectionEnd ?? s;
+          t.value = t.value.slice(0, s) + '\n' + t.value.slice(n);
+          t.selectionStart = t.selectionEnd = s + 1;
+          return;
+        }
+        if (e.key === 'Enter' && !e.shiftKey) { e.preventDefault(); send(); return; }
 
         // Terminal habit: an empty box and Up gets back what you just asked, to edit rather than
         // retype. Only when empty, or it would eat cursor movement in a question being written.
@@ -2360,7 +2372,8 @@ vv_ai_profiles_script();
 // broke the tab it lives on.
 function vv_ai_chat_keys(): array {
     return [
-        ['keys' => ['Ctrl', 'Enter'], 'what' => 'Ask',                        'id' => 'send'],
+        ['keys' => ['Enter'],         'what' => 'Ask',                         'id' => 'send'],
+        ['keys' => ['Ctrl', 'Enter'], 'what' => 'New line',                    'id' => 'nl'],
         ['keys' => ['↑'],             'what' => 'Your last question, to edit', 'id' => 'recall'],
         ['keys' => ['/'],             'what' => 'Command — /help lists them',   'id' => 'slash'],
         ['keys' => ['Esc'],           'what' => 'Close a menu, or clear the box', 'id' => 'esc'],