fix: Fix input text not showing

- Add global Input style with visible colors
- Ensure text color is set correctly
- Simplify component styles
- Remove conflicting styles

graph_memory_tui/styles/app.css

@@ -5,6 +5,17 @@ GraphMemoryApp {
     color: $text;
 }
 
+/* 全局Input样式 - 确保可见 */
+Input {
+    background: $surface-lighten-1;
+    color: $text;
+    border: solid $primary;
+}
+
+Input:focus {
+    border: double $accent;
+}
+
 LeftPanel {
     width: 1fr;
     dock: left;

graph_memory_tui/styles/components.css

@@ -1,5 +1,20 @@
 /* Component Styles for Graph Memory TUI */
 
+/* Input Box - 最重要 */
+InputBox {
+    background: $surface;
+    padding: 1 2;
+    height: auto;
+    border: solid $primary;
+}
+
+InputBox Input {
+    width: 100%;
+    background: $surface-lighten-1;
+    color: $text;
+    border: none;
+}
+
 /* Config Section */
 ConfigSection {
     background: $surface;
@@ -32,31 +47,6 @@ ConfigSection Input {
     color: $text;
 }
 
-ConfigSection Input:focus {
-    border: double $primary;
-    background: $surface-lighten-2;
-}
-
-/* Input Box */
-InputBox {
-    background: $surface;
-    padding: 1;
-    height: auto;
-}
-
-InputBox Input {
-    width: 1fr;
-    background: $surface;
-    color: $text;
-    border: solid $primary;
-    padding: 1;
-}
-
-InputBox Input:focus {
-    border: double $accent;
-    background: $surface-lighten-1;
-}
-
 /* Other Components */
 OperationLog {
     background: $surface-darken-1;