Web: check the autosave deadline from the font-poll tick (#1775)

A ten-minute time::every on wasm piles up long setTimeouts in the shared
wasmtimer driver until it stops waking every timer, which silenced the
automation channel and drop-open about 8 s after load.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

src/app/view/mod.rs

@@ -2512,8 +2512,10 @@ impl OpenCADStudio {
         let web_fonts = Subscription::none();
         // Periodic autosave (SAVETIME): a `.sv$` recovery copy beside the file
         // on native, an OPFS snapshot on web. SAVETIME is the interval in
-        // minutes; 0 disables it.
-        let autosave = if self.savetime_min > 0 {
+        // minutes; 0 disables it. The web build checks the deadline from the
+        // `PollWebFonts` tick instead: a long `time::every` there stalls every
+        // other timer for its whole period (#1775).
+        let autosave = if self.savetime_min > 0 && cfg!(not(target_arch = "wasm32")) {
             iced::time::every(std::time::Duration::from_secs(
                 self.savetime_min as u64 * 60,
             ))