feat(desktop): improve composer contrast

Author: usrnk1

packages/session-ui/src/v2/components/prompt-input/index.tsx

@@ -110,7 +110,7 @@ export function PromptInputV2(props: PromptInputV2Props) {
       <form
         data-component="prompt-input-v2"
         data-dock-border-underlay={props.borderUnderlay ? "v2" : undefined}
-        class="group/prompt-input relative min-h-[96px] w-full overflow-clip rounded-xl bg-v2-background-bg-base"
+        class="group/prompt-input relative min-h-[96px] w-full overflow-clip rounded-xl border-[0.5px] border-v2-border-border-base bg-v2-background-bg-base"
         classList={{
           "shadow-[var(--v2-elevation-raised)]": !props.borderUnderlay,
           "border border-v2-icon-icon-info border-dashed": state.drag === "active",
@@ -691,7 +691,7 @@ export function PromptInputV2SubmitButton(props: {
         tabIndex={props.mode === "normal" ? undefined : -1}
         icon={props.stopping ? "stop" : props.mode === "shell" ? "arrow-undo-down" : "arrow-up"}
         variant="primary"
-        class="size-7 rounded-md p-[6px] text-v2-icon-icon-muted shadow-[var(--v2-elevation-button-contrast)] disabled:opacity-50"
+        class="size-7 rounded-md p-[6px] [&_[data-slot=icon-svg]]:!text-v2-icon-icon-contrast shadow-[var(--v2-elevation-button-contrast)] disabled:opacity-50"
         style={{
           "background-image":
             "linear-gradient(180deg,var(--v2-alpha-light-20) 0%,var(--v2-alpha-light-0) 100%),linear-gradient(90deg,var(--v2-background-bg-contrast) 0%,var(--v2-background-bg-contrast) 100%)",