fix(admin): keep ticket internal notes compact

Show only the latest three notes and fold older ones into a details
toggle, collapse the note composer to one line until focused, and cap
the sidebar height to the dialog body so its controls stay reachable.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

assets/css/admin/tickets.css

@@ -62,7 +62,7 @@ html.aksrt-ticket-modal-open { overflow: hidden; scrollbar-gutter: stable; }
 .aksrt-ticket-dialog__foot > .aksrt-ticket-hint { margin-right: auto; }
 .aksrt-ticket-dialog [hidden] { display: none !important; }
 .aksrt-ticket-dialog textarea { box-sizing: border-box; width: 100%; min-height: 64px; resize: vertical; line-height: 1.65; }
-.aksrt-ticket-dialog :is(input, select, textarea, button, a):focus-visible,
+.aksrt-ticket-dialog :is(input, select, textarea, button, a, summary):focus-visible,
 .aksrt-ticket-conversation__scroll:focus-visible { outline: 2px solid var(--an-primary); outline-offset: 2px; box-shadow: none; }
 .aksrt-ticket-dialog button:disabled { cursor: default; opacity: .6; }
 .aksrt-ticket-feedback { display: flex; flex: none; align-items: center; justify-content: space-between; gap: 12px; padding: 10px 24px; color: #176b3d; background: var(--an-primary-soft); border-bottom: 1px solid color-mix(in srgb, var(--an-primary) 18%, transparent); font-size: 13px; }
@@ -74,7 +74,8 @@ html.aksrt-ticket-modal-open { overflow: hidden; scrollbar-gutter: stable; }
 .aksrt-ticket-detail { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 16px; align-items: start; }
 .aksrt-ticket-detail__main,
 .aksrt-ticket-detail__side { display: flex; flex-direction: column; gap: 16px; min-width: 0; }
-.aksrt-ticket-detail__side { position: sticky; top: 0; }
+/* 侧栏不超过弹窗正文可视高度（变量由脚本按正文尺寸写入，减去上下内边距），超出时栏内滚动。 */
+.aksrt-ticket-detail__side { position: sticky; top: 0; max-height: calc(var(--aksrt-ticket-panel-height, calc(100dvh - 160px)) - 32px); overflow-y: auto; overscroll-behavior: contain; scrollbar-width: thin; }
 .aksrt-ticket-conversation,
 .aksrt-ticket-composer--reply,
 .aksrt-ticket-detail__card { background: var(--an-card); border: 1px solid var(--an-border); border-radius: var(--an-radius); }
@@ -118,7 +119,6 @@ html.aksrt-ticket-modal-open { overflow: hidden; scrollbar-gutter: stable; }
 .aksrt-ticket-composer--reply { padding: 14px 16px 16px; }
 .aksrt-ticket-composer__head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 10px; margin-bottom: 8px; }
 .aksrt-ticket-composer__head label { color: var(--an-text); font-size: 14px; font-weight: 600; }
-.aksrt-ticket-composer--note .aksrt-ticket-composer__head label { font-size: 13px; font-weight: 500; }
 .aksrt-ticket-composer__box { background: var(--an-card); border: 1px solid var(--an-border); border-radius: var(--an-radius-sm); transition: border-color .15s, box-shadow .15s; }
 .aksrt-ticket-composer__box:focus-within { border-color: var(--an-primary); box-shadow: 0 0 0 2px color-mix(in srgb, var(--an-primary) 18%, transparent); }
 .aksrt-native .aksrt-ticket-composer__box textarea { display: block; padding: 10px 12px; background: transparent; border: 0; border-radius: var(--an-radius-sm) var(--an-radius-sm) 0 0; box-shadow: none; }
@@ -147,15 +147,27 @@ html.aksrt-ticket-modal-open { overflow: hidden; scrollbar-gutter: stable; }
 .aksrt-ticket-detail__private { background: #fffbf0; border-color: #f3e2b6; }
 .aksrt-ticket-detail__private .aksrt-ticket-section-head { margin-bottom: 4px; }
 .aksrt-ticket-detail__private > .aksrt-ticket-hint { margin: 0 0 12px; color: #a26b07; }
-.aksrt-ticket-detail__notes { display: flex; flex-direction: column; gap: 8px; max-height: 240px; margin: 0 0 12px; padding: 0; overflow-y: auto; list-style: none; }
+.aksrt-ticket-detail__notes { max-height: 240px; margin: 0 0 12px; overflow-y: auto; overscroll-behavior: contain; }
+.aksrt-ticket-detail__notes ol { display: flex; flex-direction: column; gap: 8px; margin: 0; padding: 0; list-style: none; }
+.aksrt-ticket-detail__notes-older { margin-bottom: 8px; }
+.aksrt-ticket-detail__notes-older > summary { display: flex; align-items: center; gap: 6px; padding: 2px 0; color: #a26b07; font-size: 12px; cursor: pointer; list-style: none; }
+.aksrt-ticket-detail__notes-older > summary::-webkit-details-marker { display: none; }
+.aksrt-ticket-detail__notes-older > summary::before { content: ""; flex: none; width: 5px; height: 5px; border-right: 1.5px solid currentColor; border-bottom: 1.5px solid currentColor; transform: rotate(-45deg); transition: transform .15s; }
+.aksrt-ticket-detail__notes-older[open] > summary::before { transform: rotate(45deg); }
+.aksrt-ticket-detail__notes-older > summary:hover { color: #7a5005; }
+.aksrt-ticket-detail__notes-older > ol { margin-top: 8px; }
 .aksrt-ticket-detail__notes li { margin: 0; padding: 8px 10px; background: var(--an-card); border: 1px solid #f3e2b6; border-radius: var(--an-radius-sm); font-size: 13px; line-height: 1.6; overflow-wrap: anywhere; }
 .aksrt-ticket-detail__note-head { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 4px; margin-bottom: 4px; font-size: 12px; }
 .aksrt-ticket-detail__note-head time { color: var(--an-muted); font-variant-numeric: tabular-nums; }
 .aksrt-ticket-detail__private .aksrt-ticket-composer__box { border-color: #f3e2b6; }
+/* 备注输入平时收成一行；聚焦或已有内容时展开为多行并显示提交栏。卡片标题已说明用途，标签仅供读屏。 */
+.aksrt-ticket-composer--note .aksrt-ticket-composer__head { position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
+.aksrt-ticket-composer--note:not(:focus-within):has(textarea:placeholder-shown) textarea { height: 42px; min-height: 0; resize: none; overflow: hidden; }
+.aksrt-ticket-composer--note:not(:focus-within):has(textarea:placeholder-shown) .aksrt-ticket-composer__bar { display: none; }
 
 @media (max-width: 960px) {
 	.aksrt-ticket-detail { grid-template-columns: minmax(0, 1fr); }
-	.aksrt-ticket-detail__side { position: static; }
+	.aksrt-ticket-detail__side { position: static; max-height: none; overflow: visible; }
 }
 @media (max-width: 600px) {
 	.aksrt-ticket-dialog,