refactor(ui): cleaner setup wizard and dashboard card visuals

- setup.rs: remove raw prefix/expected path labels from install view;
  hide URL input when official installer is pre-filled (show green tick
  instead), revealing an override field only when needed
- gui.rs: drop raw exe path from scan result rows; add per-state colour
  to status indicator (green=running, blue=installed, grey=not installed)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/gui.rs

@@ -775,13 +775,17 @@ fn launcher_card<'a>(
     scan_results: Option<&'a Vec<(String, String)>>,
     scan_busy: bool,
 ) -> Element<'a, Message> {
-    let status_label = if running {
-        "● Running"
+    let status_color = if running {
+        Color::from_rgb(0.4, 0.9, 0.4)
     } else if installed {
-        "○ Installed"
+        Color::from_rgb(0.55, 0.75, 1.0)
     } else {
-        "· Not installed"
+        Color::from_rgb(0.5, 0.5, 0.5)
     };
+    let status_str = if running { "● Running" } else if installed { "○ Installed" } else { "· Not installed" };
+    let status_el: Element<Message> = text(status_str).size(12).style(move |_: &Theme| text::Style {
+        color: Some(status_color),
+    }).into();
 
     let action: Element<Message> = {
         let n = l.name.clone();
@@ -816,8 +820,8 @@ fn launcher_card<'a>(
 
     let header = row![
         text(&l.display).size(15),
-        text("  —  ").size(12),
-        text(status_label).size(12),
+        text("  ").size(12),
+        status_el,
         version_badge,
         iced::widget::horizontal_space(),
         action,
@@ -867,11 +871,8 @@ fn launcher_card<'a>(
             rows.push(
                 row![
                     text("   ").size(12),
-                    text(format!("⊕ {display}")).size(12).style(|_: &Theme| text::Style {
-                        color: Some(Color::from_rgb(0.65, 0.65, 0.65)),
-                    }),
-                    text(format!("  {exe}")).size(10).style(|_: &Theme| text::Style {
-                        color: Some(Color::from_rgb(0.45, 0.45, 0.45)),
+                    text(display).size(12).style(|_: &Theme| text::Style {
+                        color: Some(Color::from_rgb(0.75, 0.75, 0.75)),
                     }),
                     iced::widget::horizontal_space(),
                     add_btn,