재구성 AX Agent 설정과 채팅 UI를 Claude형 구조로

src/AxCopilot/Themes/AgentSlateLight.xaml

@@ -0,0 +1,17 @@
+<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
+    <SolidColorBrush x:Key="LauncherBackground" Color="#F6F7FB"/>
+    <SolidColorBrush x:Key="ItemBackground" Color="#FFFFFF"/>
+    <SolidColorBrush x:Key="ItemSelectedBackground" Color="#E8ECF7"/>
+    <SolidColorBrush x:Key="ItemHoverBackground" Color="#EEF2F8"/>
+    <SolidColorBrush x:Key="PrimaryText" Color="#172033"/>
+    <SolidColorBrush x:Key="SecondaryText" Color="#667085"/>
+    <SolidColorBrush x:Key="PlaceholderText" Color="#98A2B3"/>
+    <SolidColorBrush x:Key="AccentColor" Color="#4F46E5"/>
+    <SolidColorBrush x:Key="SeparatorColor" Color="#D8DFEA"/>
+    <SolidColorBrush x:Key="HintBackground" Color="#EEF2FF"/>
+    <SolidColorBrush x:Key="HintText" Color="#4338CA"/>
+    <SolidColorBrush x:Key="BorderColor" Color="#D8DFEA"/>
+    <SolidColorBrush x:Key="ScrollbarThumb" Color="#B3BDD0"/>
+    <SolidColorBrush x:Key="ShadowColor" Color="#22000000"/>
+</ResourceDictionary>