font Serve Vazirmatn WOFF2 with explicit Content-Type headers

Switch Vazirmatn font-face from TTF-only to WOFF2 to halve the
font payload (~50 KB vs ~105 KB per weight). Add a staticHandler
middleware that injects font/ttf and font/woff2 Content-Type headers
so browsers don't reject them as application/octet-stream.

internal/app/server_test.go

@@ -934,3 +934,36 @@ func extractCSRF(t *testing.T, body string) string {
 	}
 	return match[1]
 }
+
+func TestStaticHandlerSetsFontContentTypes(t *testing.T) {
+	s, err := New(Config{
+		Addr:         ":0",
+		BaseURL:      "http://example.test",
+		DatabasePath: filepath.Join(t.TempDir(), "font.db"),
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer s.Close()
+
+	tests := []struct {
+		path string
+		want string
+	}{
+		{"/static/vendor/fonts/webfonts/Vazirmatn-400.ttf", "font/ttf"},
+		{"/static/vendor/fonts/webfonts/Vazirmatn-Bold.woff2", "font/woff2"},
+		{"/static/vendor/fontawesome.min.css", "text/css; charset=utf-8"},
+	}
+	for _, tt := range tests {
+		req := httptest.NewRequest(http.MethodGet, tt.path, nil)
+		rec := httptest.NewRecorder()
+		s.http.Handler.ServeHTTP(rec, req)
+		if rec.Code != http.StatusOK {
+			t.Errorf("%s: status %d", tt.path, rec.Code)
+			continue
+		}
+		if ct := rec.Header().Get("Content-Type"); ct != tt.want {
+			t.Errorf("%s: Content-Type = %q, want %q", tt.path, ct, tt.want)
+		}
+	}
+}