fix(v1.9.3): 修复任务卡按钮错位、日历头部对齐、标签深底深字

- 任务卡改为「正文 + 右侧操作」两列布局，按钮横排不换行；标题/副标题/备注分别用主文字色与弱化色
- 套餐/订阅行内操作按钮（详情、编辑、归档、完成、⋯）统一 flex 横排，不再竖排堆叠
- tagchip/chip 改浅底深字并区分明暗主题，修复深色背景配深色字体
- 日历头部（月份、‹ ›、回到今天、右侧统计）统一 align-items:center
- 徽标 text-bg-success 与表格表头、任务副标题对比度不足的问题按明暗主题分别补色
- 版本 1.9.3；仅前端样式

验证：无头浏览器两态截图（shots/ink193b/sheet.png），亮色主题已能正确切换

internal/web/static/app.css

@@ -1333,3 +1333,73 @@ a:hover { color: var(--ink-green-3); }
 .heat-cell.h2 { background: rgba(47,163,122,.26); }
 .heat-cell.h3 { background: rgba(47,163,122,.40); }
 .heat-cell.h4 { background: rgba(47,163,122,.58); }
+
+
+/* ---------- v1.9.3 fixes：布局与对比度 ---------- */
+
+/* 日历头部：左右两组垂直居中 */
+.cal-head, .cal-toolbar, .month-nav {
+  display: flex; align-items: center; gap: 10px;
+  flex-wrap: wrap; min-height: 40px;
+}
+.cal-head h1, .month-nav h1, .month-nav b { margin: 0; line-height: 1.2; display: inline-flex; align-items: center; }
+.cal-head .btn, .month-nav .btn, .cal-toolbar .btn { align-self: center; }
+
+/* 任务卡：正文与操作按钮分两列，按钮横排、不换行 */
+.task {
+  display: flex !important; align-items: flex-start; gap: 10px;
+  flex-wrap: nowrap; padding-block: 10px;
+}
+.task-main { flex: 1 1 auto; min-width: 0; display: flex; flex-direction: column; gap: 3px; }
+.task-actions { flex: 0 0 auto; display: flex; align-items: center; gap: 6px; margin-left: auto; }
+.task-actions form { display: inline-flex; margin: 0; }
+.task-actions .btn, .task .btn { white-space: nowrap; padding-block: .2rem; }
+.task-title {
+  color: var(--ink-ink) !important; font-weight: 650; text-decoration: none;
+  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
+}
+.task-title:hover { color: var(--ink-green-3) !important; }
+.task-meta, .task-sub, .task-note, .task .muted {
+  color: var(--ink-muted) !important; font-size: .78rem;
+}
+.task.urgent .task-title { color: #f08a82 !important; }
+
+/* 标签/徽记：浅底深字，任何主题都读得清 */
+.tagchip, .chip, .pkg-tag, .tag {
+  display: inline-flex; align-items: center; gap: 4px;
+  padding: 1px 8px; border-radius: 999px;
+  background: rgba(47,163,122,.16) !important;
+  border: 1px solid rgba(47,163,122,.38) !important;
+  color: var(--ink-ink) !important;
+  font-size: .72rem; font-weight: 600; line-height: 1.7;
+}
+[data-theme="dark"] .tagchip, [data-theme="dark"] .chip,
+[data-bs-theme="dark"] .tagchip, [data-bs-theme="dark"] .chip {
+  background: rgba(99,214,173,.18) !important;
+  border-color: rgba(99,214,173,.42) !important;
+  color: #d8f5e9 !important;
+}
+[data-theme="dark"] .tagchip, [data-bs-theme="dark"] .tagchip { color: #bfe9d8 !important; }
+
+/* 套餐表格行操作按钮 */
+.actions, .row-actions, td .actions {
+  display: flex; align-items: center; gap: 8px; flex-wrap: nowrap;
+}
+.actions form, .row-actions form { display: inline-flex; margin: 0; }
+.actions .btn, .row-actions .btn, td .btn { white-space: nowrap; padding-block: .2rem; }
+
+/* 订阅卡动作行 */
+.subcard-foot { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
+.subcard-foot form { display: inline-flex; margin: 0; }
+
+/* 表格正文对比度 */
+.table td, .table td a, .table td strong { color: var(--ink-ink); }
+.table td .muted, .table td small { color: var(--ink-muted) !important; }
+
+/* v1.9.3 对比度补丁 */
+.badge.text-bg-success { background: #1d7a58 !important; color: #f2fffa !important; }
+.table thead th { color: #4f6a5e !important; }
+[data-bs-theme="dark"] .table thead th, [data-theme="dark"] .table thead th { color: var(--ink-muted) !important; }
+.task-meta, .task-sub, .task-note { color: #55705f !important; }
+[data-bs-theme="dark"] .task-meta, [data-theme="dark"] .task-meta,
+[data-bs-theme="dark"] .task-sub, [data-theme="dark"] .task-sub { color: #9dbbac !important; }