[feat] 디테일

1. Email Button - placeholder
2. ChatList alt 추가

src/Components/Auth/Signin/EmailButton.js

@@ -33,7 +33,7 @@ function EmailButton({
                 setWarningMessage(errorResponse.error);
             }
         } catch (error) {
-            setWarningMessage('${error.response.data.error}');
+            setWarningMessage(`${error.response.data.error}`);
         }
     };
 
@@ -51,7 +51,7 @@ function EmailButton({
                 type="text"
                 value={verifyNum}
                 onChange={onValueChange}
-                placeholder="Verification Number"
+                placeholder="인증 번호"
                 className="email-verification-input"
             />
             <input

src/Pages/Main/ChatList.js

@@ -59,7 +59,7 @@ function ChatList() {
           onClick={() => setShowPopup(true)}
           style={{ background: "transparent", border: "none" }}
         >
-          <img src={AddChatIcon} height={"30px"} />
+          <img src={AddChatIcon} alt="Add" height={"30px"} />
         </button>
       </div>