diff --git a/apps/ai-game-creator-shell/src/features/project-workspace/ProjectSupervisorView.tsx b/apps/ai-game-creator-shell/src/features/project-workspace/ProjectSupervisorView.tsx
index 0e4117a59..85d43f304 100644
--- a/apps/ai-game-creator-shell/src/features/project-workspace/ProjectSupervisorView.tsx
+++ b/apps/ai-game-creator-shell/src/features/project-workspace/ProjectSupervisorView.tsx
@@ -164,6 +164,7 @@ export function ProjectSupervisorView({
   const submitButton = (
     <button
       type="submit"
+      className="project-supervisor-submit-button"
       aria-label={submitLabel}
       title={submitLabel}
       disabled={
@@ -400,23 +401,27 @@ export function ProjectSupervisorView({
           />
           {directCodex ? (
             <div className="project-supervisor-composer-controls">
-              <ConversationModelSelect
-                ref={modelSelectRef}
-                disabled={runtimePanelProps.controlBusy || needsUserInput}
-                onReady={setModelReady}
-                projectPath={projectPath}
-              />
-              <button
-                type="button"
-                className="project-supervisor-reference-trigger"
-                aria-label="插入素材引用"
-                title="插入素材引用"
-                disabled={runtimePanelProps.controlBusy || needsUserInput}
-                onClick={() => composerRef?.current?.openPicker()}
-              >
-                <AtSign size={15} aria-hidden="true" />
-              </button>
-              {submitButton}
+              <div className="project-supervisor-composer-controls-left">
+                <button
+                  type="button"
+                  className="project-supervisor-reference-trigger"
+                  aria-label="插入素材引用"
+                  title="插入素材引用"
+                  disabled={runtimePanelProps.controlBusy || needsUserInput}
+                  onClick={() => composerRef?.current?.openPicker()}
+                >
+                  <AtSign size={15} aria-hidden="true" />
+                </button>
+              </div>
+              <div className="project-supervisor-composer-controls-right">
+                <ConversationModelSelect
+                  ref={modelSelectRef}
+                  disabled={runtimePanelProps.controlBusy || needsUserInput}
+                  onReady={setModelReady}
+                  projectPath={projectPath}
+                />
+                {submitButton}
+              </div>
             </div>
           ) : (
             submitButton
diff --git a/apps/ai-game-creator-shell/src/styles.css b/apps/ai-game-creator-shell/src/styles.css
index b60ce35ef..b50c64794 100644
--- a/apps/ai-game-creator-shell/src/styles.css
+++ b/apps/ai-game-creator-shell/src/styles.css
@@ -9047,7 +9047,7 @@ iframe.preview-frame {
   bottom: 0;
   left: 0;
   z-index: 5;
-  padding: 10px 12px 8px;
+  padding: 8px 12px;
   border: 1px solid var(--platform-surface-border);
   border-radius: 14px;
   background: var(--platform-input-fill);
@@ -9060,8 +9060,8 @@ iframe.preview-frame {
   .project-supervisor-composer.is-direct-codex
   .resource-reference-input {
   width: 100%;
-  min-height: 64px;
-  padding: 0 0 6px;
+  min-height: 56px;
+  padding: 0 0 4px;
   border: 0;
   border-radius: 0;
   background: transparent;
@@ -9091,13 +9091,36 @@ iframe.preview-frame {
   .project-supervisor-composer-controls {
   display: flex;
   align-items: center;
-  justify-content: flex-end;
+  justify-content: space-between;
   gap: 8px;
   min-width: 0;
-  padding-top: 4px;
+  padding-top: 2px;
   pointer-events: auto;
 }
 
+.game-workbench-chat
+  .project-supervisor-surface.is-direct-codex
+  .project-supervisor-composer.is-direct-codex
+  .project-supervisor-composer-controls
+  .project-supervisor-composer-controls-left,
+.game-workbench-chat
+  .project-supervisor-surface.is-direct-codex
+  .project-supervisor-composer.is-direct-codex
+  .project-supervisor-composer-controls
+  .project-supervisor-composer-controls-right {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  min-width: 0;
+}
+
+.game-workbench-chat
+  .project-supervisor-surface.is-direct-codex
+  .project-supervisor-composer.is-direct-codex
+  .project-supervisor-composer-controls-right {
+  margin-left: auto;
+}
+
 .game-workbench-chat
   .project-supervisor-surface.is-direct-codex
   .project-supervisor-composer.is-direct-codex
@@ -9113,7 +9136,12 @@ iframe.preview-frame {
   .project-supervisor-surface.is-direct-codex
   .project-supervisor-composer.is-direct-codex
   .project-supervisor-composer-controls
-  > button {
+  .project-supervisor-reference-trigger,
+.game-workbench-chat
+  .project-supervisor-surface.is-direct-codex
+  .project-supervisor-composer.is-direct-codex
+  .project-supervisor-composer-controls
+  .project-supervisor-submit-button {
   position: static !important;
   right: auto !important;
   bottom: auto !important;
@@ -9125,9 +9153,61 @@ iframe.preview-frame {
   padding: 0;
   border: 0;
   border-radius: 9px;
+  place-items: center;
+}
+
+.game-workbench-chat
+  .project-supervisor-surface.is-direct-codex
+  .project-supervisor-composer.is-direct-codex
+  .project-supervisor-reference-trigger {
+  background: transparent;
+  color: var(--platform-text-soft);
+}
+
+.game-workbench-chat
+  .project-supervisor-surface.is-direct-codex
+  .project-supervisor-composer.is-direct-codex
+  .project-supervisor-reference-trigger:hover:not(:disabled),
+.game-workbench-chat
+  .project-supervisor-surface.is-direct-codex
+  .project-supervisor-composer.is-direct-codex
+  .project-supervisor-reference-trigger:focus-visible {
+  background: var(--platform-button-ghost-fill);
+  color: var(--platform-text-strong);
+}
+
+.game-workbench-chat
+  .project-supervisor-surface.is-direct-codex
+  .project-supervisor-composer.is-direct-codex
+  .project-supervisor-submit-button {
   background: var(--platform-button-primary-fill);
   color: var(--platform-button-primary-text);
-  place-items: center;
+}
+
+.game-workbench-chat
+  .project-supervisor-surface.is-direct-codex
+  .project-supervisor-message-list {
+  bottom: 116px;
+}
+
+.resource-reference-input-editor {
+  scrollbar-color: #cbd5e1 transparent;
+  scrollbar-width: thin;
+}
+
+.resource-reference-input-editor::-webkit-scrollbar {
+  width: 8px;
+}
+
+.resource-reference-input-editor::-webkit-scrollbar-thumb {
+  border: 2px solid transparent;
+  border-radius: 999px;
+  background: #cbd5e1;
+  background-clip: padding-box;
+}
+
+.resource-reference-input-editor::-webkit-scrollbar-track {
+  background: transparent;
 }
 
 .project-supervisor-composer .resource-reference-input {