Fine tune light theme (#22)

- Enhance the color contrast for typography and icons.
- Resolve visibility issues related to dashboard editing.

themes/graphite.yaml

@@ -287,13 +287,13 @@ Graphite:
       token-color-feedback-error: rgb(179, 57, 96)
       token-color-feedback-success: rgb(29, 143, 95)
       token-color-icon-primary: rgba(19, 21, 54, 0.87)
-      token-color-icon-secondary: rgba(19, 21, 54, 0.7)
+      token-color-icon-secondary: rgba(19, 21, 54, 0.8)
       token-color-icon-sidebar: rgba(19, 21, 54, 0.7)
-      token-color-icon-sidebar-selected: rgba(19, 21, 54, 0.87)
-      token-color-text-primary: rgba(19, 21, 54, 0.87)
-      token-color-text-secondary: rgba(19, 21, 54, 0.7)
+      token-color-icon-sidebar-selected: var(--token-color-icon-primary)
+      token-color-text-primary: rgba(19, 21, 54, 0.95)
+      token-color-text-secondary: rgba(19, 21, 54, 0.8)
       token-color-text-disabled: rgba(19, 21, 54, 0.38)
-      token-color-text-sidebar-selected: rgba(19, 21, 54, 0.87)
+      token-color-text-sidebar-selected: var(--token-color-text-primary)
       token-color-text-sidebar: var(--token-color-text-secondary)
       token-color-text-label-badge: rgba(19, 21, 54, 0.7)
       token-color-background-base: rgb(225, 226, 229)
@@ -369,6 +369,7 @@ Graphite:
       text-primary-color: var(--token-color-text-primary)
       text-light-primary-color: var(--token-color-text-primary)
       disabled-text-color: var(--token-color-text-disabled)
+      app-header-edit-text-color: var(--token-color-text-primary)
 
       # Main interface colors
       primary-color: var(--token-color-primary)