feat(ui): add vision and reasoning symbols, fix dropdown fonts

Add new Font Awesome symbols for model capability indicators:
- vision symbol (eye icon) for vision-capable VLM models
- reasoning symbol (lightbulb icon) for thinking/reasoning models

Also fix dropdown font styling by adding NotoSans font-family.

javascript/sdnext.css

@@ -289,6 +289,12 @@ input::-webkit-outer-spin-button, input::-webkit-inner-spin-button {
 .gradio-dropdown .token {
   overflow-x: hidden;
   padding: var(--spacing-xs) !important;
+  font-family: 'NotoSans', var(--font);
+}
+
+.gradio-dropdown .wrap input,
+.gradio-dropdown input {
+  font-family: 'NotoSans', var(--font);
 }
 
 .gradio-html {

modules/ui_symbols.py

@@ -28,6 +28,8 @@ image = '🖌️'
 resize = '⁜'
 interrogate = '♻'
 bullet = '⃝'
+vision = '\uf06e'  # Font Awesome eye icon (more minimalistic)
+reasoning = '\uf0eb'  # Font Awesome lightbulb icon (represents thinking/reasoning)
 sort_alpha_asc = '\uf15d'
 sort_alpha_dsc = '\uf15e'
 sort_size_asc = '\uf160'