fix: allow quick menu actions and stabilize blank welcome

static/src/app.ts

@@ -151,6 +151,7 @@ const appOptions = {
                 blankHeroActive: false,
                 blankHeroExiting: false,
                 blankWelcomeText: '',
+                lastBlankConversationId: null,
                 blankWelcomePool: [
                     '有什么可以帮忙的？',
                     '想了解些热点吗？',
@@ -2427,14 +2428,21 @@ const appOptions = {
 
             refreshBlankHeroState() {
                 const isBlank = this.isConversationBlank();
+                const currentConv = this.currentConversationId || 'temp';
+                const needNewWelcome =
+                    !this.blankHeroActive ||
+                    this.lastBlankConversationId !== currentConv;
+
                 if (isBlank) {
-                    if (!this.blankHeroExiting) {
+                    if (needNewWelcome && !this.blankHeroExiting) {
                         this.pickWelcomeText();
                     }
                     this.blankHeroActive = true;
+                    this.lastBlankConversationId = currentConv;
                 } else {
                     this.blankHeroActive = false;
                     this.blankHeroExiting = false;
+                    this.lastBlankConversationId = null;
                 }
             },
 

static/src/components/input/InputComposer.vue

@@ -15,7 +15,7 @@
           type="button"
           class="stadium-btn add-btn"
           @click.stop="$emit('toggle-quick-menu')"
-          :disabled="!isConnected || streamingMessage || inputLocked"
+          :disabled="!isConnected"
         >
           +
         </button>