Web: apps/solvecraft-web (Trunk, eframe web runner, WebGPU or WebGL2), cargo xtask wasm in ci, web-time clocks

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01AS5Tn3xieewUSg3uxrMVdL

crates/ui-egui/src/lib.rs

@@ -441,6 +441,6 @@ impl SolveApp {
 }
 
 pub fn now_ms() -> f64 {
-    use std::time::{SystemTime, UNIX_EPOCH};
+    use web_time::{SystemTime, UNIX_EPOCH};
     SystemTime::now().duration_since(UNIX_EPOCH).map(|d| d.as_secs_f64() * 1000.0).unwrap_or(0.0)
 }