feat(ui): add dedicated calm block screen mode and auto-launch from daemon

desktop/daemon/src/runner.rs

@@ -167,6 +167,14 @@ fn enforce_if_blocked(
                 &format!("Blocker: {target_name} blocked"),
                 "Focus blocked by active schedule",
             );
+
+            // Launch the calm block screen GUI in the background if available
+            let ui_exe = std::env::current_exe()
+                .ok()
+                .and_then(|p| p.parent().map(|d| d.join("blocker-ui")))
+                .unwrap_or_else(|| std::path::PathBuf::from("blocker-ui"));
+            let _ = std::process::Command::new(ui_exe).arg("--block").spawn();
+
             1
         }
         Err(e) => {

desktop/ui/src/main.rs

@@ -13,7 +13,8 @@ fn main() -> eframe::Result<()> {
         viewport: egui::ViewportBuilder::default()
             .with_inner_size(if is_block_screen { [520.0, 360.0] } else { [720.0, 520.0] })
             .with_min_inner_size([400.0, 300.0])
-            .with_title("Blocker"),
+            .with_title(if is_block_screen { "Blocker — Stay Focused" } else { "Blocker" })
+            .with_always_on_top(),
         ..Default::default()
     };