chore: bump version to v0.9.74 and update chat handler comments for clarity

package.json

@@ -1,6 +1,6 @@
 {
   "name": "vocechat-web",
-  "version": "0.9.73",
+  "version": "0.9.74",
   "homepage": "https://voce.chat",
   "dependencies": {
     "@metamask/onboarding": "^1.0.1",

src/hooks/useStreaming/chat.handler.ts

@@ -99,8 +99,8 @@ const handler = (
         }
         // }
       });
-      // 推给 PC 端
-      {
+      // 推给 PC 端（自己发的不推送）
+      if (!self) {
         const state = store.getState();
         const sender = state.users.byId[from_uid]?.name ?? "";
         const channel =