Restore strategy/positions height sync and shared market columns.

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/src/styles/app.css

@@ -232,22 +232,28 @@ input {
   min-width: 0;
 }
 
-/* 计划页：左右两列对齐（策略+行情 | 持仓+ATM） */
-.plan-board {
-  display: grid;
-  grid-template-columns: minmax(280px, 1fr) minmax(320px, 1.15fr);
-  gap: 12px;
-  align-items: start;
+/* 计划页：上排策略|持仓顶底对齐；下排行情同列宽对齐 */
+.plan-shell {
+  --plan-cols: minmax(280px, 1fr) minmax(320px, 1.15fr);
+  --plan-gap: 12px;
+  display: flex;
+  flex-direction: column;
+  gap: var(--plan-gap);
   margin-bottom: 12px;
 }
 
-.plan-col {
-  display: flex;
-  flex-direction: column;
-  gap: 12px;
+.plan-board,
+.plan-market {
+  display: grid;
+  grid-template-columns: var(--plan-cols);
+  gap: var(--plan-gap);
   min-width: 0;
 }
 
+.plan-board {
+  align-items: stretch;
+}
+
 .plan-panel-title {
   margin: 0 0 10px;
   font-size: 14px;
@@ -258,12 +264,15 @@ input {
 .plan-strategy {
   display: flex;
   flex-direction: column;
+  height: 100%;
   min-height: 0;
+  box-sizing: border-box;
 }
 
 .plan-metrics {
   display: flex;
   flex-direction: column;
+  flex: 1;
   min-height: 0;
 }
 
@@ -271,11 +280,22 @@ input {
   min-width: 0;
 }
 
+.plan-positions {
+  display: flex;
+  flex-direction: column;
+  gap: var(--plan-gap);
+  height: 100%;
+  min-height: 0;
+  min-width: 0;
+}
+
 .plan-positions .pos-card,
 .plan-positions .pos-empty {
+  flex: 1 1 0;
   display: flex;
   flex-direction: column;
   min-height: 0;
+  box-sizing: border-box;
 }
 
 .pos-countdown {
@@ -288,8 +308,13 @@ input {
 }
 
 @media (max-width: 960px) {
-  .plan-board {
-    grid-template-columns: 1fr;
+  .plan-shell {
+    --plan-cols: 1fr;
+  }
+
+  .plan-positions .pos-card,
+  .plan-positions .pos-empty {
+    flex: 0 0 auto;
   }
 
   .pos-countdown {