update

src/FrontOffice.Main/Pages/_Host.cshtml

@@ -15,7 +15,7 @@
     <link rel="icon" type="image/png" href="favicon.png"/>
     <component type="typeof(HeadOutlet)" render-mode="Server" />
 
-    <link href="https://fonts.googleapis.com/css?family=Roboto:300,400,500,700&display=swap" rel="stylesheet" />
+    @* <link href="https://fonts.googleapis.com/css?family=Roboto:300,400,500,700&display=swap" rel="stylesheet" /> *@
     <!-- MudBlazor CSS (باید قبل از site.css باشه تا override بشه) -->
     <link href="_content/MudBlazor/MudBlazor.min.css" rel="stylesheet" asp-append-version="true" />
     <!-- Custom styles (بعد از MudBlazor برای override) -->

src/FrontOffice.Main/wwwroot/css/site.css

@@ -39,7 +39,31 @@
     font-display: swap;
     src: url(../fonts/Vazir-Bold.ttf) format('truetype');
 }
+/* Roboto - Latin Extended */
+@font-face {
+  font-family: 'Roboto';
+  font-style: normal;
+  font-weight: 300 700;
+  font-stretch: 100%;
+  font-display: swap;
+  src: url('../fonts/roboto/roboto-latin-ext.woff2') format('woff2');
+  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF,
+    U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020,
+    U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
+}
 
+/* Roboto - Latin */
+@font-face {
+  font-family: 'Roboto';
+  font-style: normal;
+  font-weight: 300 700;
+  font-stretch: 100%;
+  font-display: swap;
+  src: url('../fonts/roboto/roboto-latin.woff2') format('woff2');
+  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA,
+    U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193,
+    U+2212, U+2215, U+FEFF, U+FFFD;
+}
 :root {
     --app-font-family: 'Vazir', Tahoma, 'Segoe UI', Arial, sans-serif;
 }