feat: bell-tower favicon, lfx-clean flows, branded HTML mail

frontend/public/favicon.svg

@@ -7,16 +7,9 @@
     }
   </style>
   <rect class="bg" x="4" y="4" width="56" height="56" rx="14"/>
-  <!-- tower -->
-  <rect class="fg" x="26" y="22" width="12" height="28"/>
-  <!-- spire -->
-  <path class="fg" d="M32 8 L40 22 H24 Z"/>
-  <!-- cross -->
-  <rect class="fg" x="31.2" y="2.5" width="1.6" height="6"/>
-  <rect class="fg" x="29.4" y="4" width="5.2" height="1.6"/>
-  <!-- nave -->
-  <rect class="fg" x="14" y="36" width="12" height="14"/>
-  <path class="fg" d="M12 36 L20 28 L28 36 Z"/>
-  <!-- door knockout -->
-  <path class="bg" d="M29 50 v-5 a3 3 0 0 1 6 0 v5 Z"/>
+  <!-- stylized bell tower: spire + shaft + bell arch -->
+  <path class="fg" d="M32 9 L41 25 H23 Z"/>
+  <rect class="fg" x="25" y="25" width="14" height="27"/>
+  <!-- bell arch knockout -->
+  <path class="bg" d="M28.5 40 v-4 a3.5 3.5 0 0 1 7 0 v4 Z"/>
 </svg>