style: update logo and favicon with new pentagon house design

src/porchlight/static/logo.svg

@@ -1,8 +1,11 @@
 <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 64 64" fill="none">
-  <!-- Doorway arch -->
-  <path d="M15 56 V28 Q15 10 32 10 Q49 10 49 28 V56" stroke="currentColor" stroke-width="4" stroke-linecap="round" stroke-linejoin="round" fill="none"/>
-  <!-- Threshold -->
-  <line x1="11" y1="56" x2="53" y2="56" stroke="currentColor" stroke-width="4" stroke-linecap="round"/>
-  <!-- Light -->
-  <circle cx="32" cy="26" r="6" fill="#d97706"/>
+  <!-- Pentagon house shape with pointed roof -->
+  <path d="M32 6 L54 22 L50 46 H14 L10 22 Z" stroke="currentColor" stroke-width="3.5" stroke-linecap="round" stroke-linejoin="round" fill="none"/>
+  <!-- Light circle -->
+  <circle cx="32" cy="28" r="6.5" stroke="currentColor" stroke-width="3" fill="none"/>
+  <circle cx="32" cy="28" r="2" fill="#d97706"/>
+  <!-- Small dot accent (upper left) -->
+  <circle cx="19" cy="18" r="1.5" fill="currentColor"/>
+  <!-- Curved lower shield/visor -->
+  <path d="M16 44 Q24 58 32 58 Q40 58 48 44" stroke="currentColor" stroke-width="3.5" stroke-linecap="round" fill="none"/>
 </svg>