fix: 收紧 AGC 输入区模型选择布局

- 模型选择改为按内容宽度靠右排列

- 取消状态点、名称和箭头之间的异常拉伸

- 拉开模型选择与发送按钮间距

apps/ai-game-creator-shell/src/styles.css

@@ -2845,7 +2845,7 @@ textarea {
   display: flex;
   align-items: center;
   justify-content: space-between;
-  gap: 8px;
+  gap: 12px;
 }
 
 .project-runtime-professional-list article > header span {
@@ -5174,7 +5174,7 @@ h2 {
 .checkpoint-list-item {
   display: flex;
   align-items: center;
-  gap: 8px;
+  gap: 10px;
   padding: 6px 8px;
   border: 1px solid #cfd7e6;
   border-radius: 6px;
@@ -9118,7 +9118,7 @@ iframe.preview-frame {
   .project-supervisor-surface.is-direct-codex
   .project-supervisor-composer.is-direct-codex
   .project-supervisor-composer-controls-right {
-  flex: 1 1 auto;
+  flex: 0 0 auto;
   margin-left: auto;
 }
 
@@ -9127,12 +9127,12 @@ iframe.preview-frame {
   .project-supervisor-composer.is-direct-codex
   .project-supervisor-composer-controls
   .conversation-model-select {
-  flex: 1 1 auto;
-  min-width: 96px;
+  flex: 0 1 auto;
+  min-width: 0;
   position: static !important;
   right: auto !important;
   bottom: auto !important;
-  max-width: min(220px, 50%);
+  max-width: 180px;
 }
 
 .game-workbench-chat
@@ -9140,9 +9140,9 @@ iframe.preview-frame {
   .project-supervisor-composer.is-direct-codex
   .project-supervisor-composer-controls
   .conversation-model-trigger {
-  flex: 1 1 auto;
+  flex: 0 1 auto;
   min-width: 0;
-  max-width: 100%;
+  max-width: 180px;
   color: var(--platform-text-base) !important;
 }
 
@@ -9151,7 +9151,7 @@ iframe.preview-frame {
   .project-supervisor-composer.is-direct-codex
   .project-supervisor-composer-controls
   .conversation-model-trigger-label {
-  flex: 1 1 auto;
+  flex: 0 1 auto;
   min-width: 0;
 }