fix(ai-chat): move FAB above Ghostfolio's own bottom buttons

Raised bottom from 1.5rem to 5.5rem and reduced size slightly so the
Ask AI button no longer overlaps the Add Account / Add Transaction FABs
that Ghostfolio renders at the bottom-right of the screen.

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/client/src/app/components/ai-chat/ai-chat.component.scss

@@ -4,26 +4,29 @@
 
 .ai-fab {
   position: fixed;
-  bottom: 1.5rem;
-  right: 1.5rem;
+  // Positioned high enough to clear Ghostfolio's own bottom FABs
+  // (Add Account / Add Transaction sit at ~1.5rem).
+  bottom: 5.5rem;
+  right: 1.25rem;
   z-index: 1200;
   display: flex;
   align-items: center;
-  gap: 0.5rem;
-  padding: 0.75rem 1.25rem;
+  gap: 0.4rem;
+  padding: 0.55rem 0.9rem;
   background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
   color: #fff;
   border: none;
   border-radius: 2rem;
-  box-shadow: 0 4px 20px rgba(99, 102, 241, 0.45);
+  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.4);
   cursor: pointer;
-  font-size: 0.9rem;
+  font-size: 0.8rem;
   font-weight: 600;
   transition: transform 0.2s ease, box-shadow 0.2s ease;
+  white-space: nowrap;
 
   &:hover {
     transform: translateY(-2px);
-    box-shadow: 0 6px 24px rgba(99, 102, 241, 0.55);
+    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.55);
   }
 
   &:active {
@@ -32,7 +35,7 @@
 
   &--open {
     border-radius: 50%;
-    padding: 0.85rem;
+    padding: 0.7rem;
     background: #6366f1;
 
     .ai-fab__label {
@@ -41,7 +44,7 @@
   }
 
   &__icon {
-    font-size: 1.2rem;
+    font-size: 1rem;
     line-height: 1;
   }