fix: stabilize web loading and paper rendering

src/io/mod.rs

@@ -242,6 +242,7 @@ pub async fn pick_and_load_web(
 /// a browser file picker (no filesystem path). Shares the post-load fixups with
 /// [`load_file`]; raster-image path resolution is skipped (there is no sibling
 /// directory to search on the web).
+#[cfg(not(target_arch = "wasm32"))]
 pub fn load_bytes(name: &str, bytes: Vec<u8>) -> Result<CadDocument, String> {
     use std::io::Cursor;
     let ext = name.rsplit('.').next().unwrap_or_default().to_lowercase();
@@ -284,6 +285,7 @@ fn sniff_dwg_or_dxf(path: &Path) -> String {
     }
 }
 
+#[cfg(not(target_arch = "wasm32"))]
 pub fn load_file(path: &Path) -> Result<CadDocument, String> {
     load_file_with_progress(path, None)
 }
@@ -553,7 +555,7 @@ pub fn save_as_version(
     path: &Path,
     version: acadrust::DxfVersion,
 ) -> Result<(), String> {
-    let clone_started = std::time::Instant::now();
+    let clone_started = iced::time::Instant::now();
     let snapshot = doc.clone();
     let clone_ms = clone_started.elapsed().as_secs_f64() * 1000.0;
     save_owned_as_version_inner(snapshot, path, version, false, clone_ms)
@@ -581,12 +583,12 @@ fn save_owned_as_version_inner(
     clone_ms: f64,
 ) -> Result<(), String> {
     let perf = crate::perf::enabled();
-    let total_started = std::time::Instant::now();
+    let total_started = iced::time::Instant::now();
     doc.version = version;
-    let styles_started = std::time::Instant::now();
+    let styles_started = iced::time::Instant::now();
     sync_current_styles_on_save(&mut doc);
     let styles_ms = styles_started.elapsed().as_secs_f64() * 1000.0;
-    let dimensions_started = std::time::Instant::now();
+    let dimensions_started = iced::time::Instant::now();
     crate::modules::draw::modify::explode::bake_dimension_blocks(&mut doc);
     let dimensions_ms = dimensions_started.elapsed().as_secs_f64() * 1000.0;
     let temp_path = save_temp_path(path);
@@ -594,7 +596,7 @@ fn save_owned_as_version_inner(
         .extension()
         .map(|e| e.to_string_lossy().to_lowercase())
         .unwrap_or_default();
-    let write_started = std::time::Instant::now();
+    let write_started = iced::time::Instant::now();
     let result = match ext.as_str() {
         "dxf" => DxfWriter::new(&doc)
             .write_to_file(&temp_path)
@@ -697,18 +699,18 @@ pub fn save_to_bytes(
     version: acadrust::DxfVersion,
 ) -> Result<Vec<u8>, String> {
     let perf = crate::perf::enabled();
-    let total_started = std::time::Instant::now();
-    let clone_started = std::time::Instant::now();
+    let total_started = iced::time::Instant::now();
+    let clone_started = iced::time::Instant::now();
     let mut doc = doc.clone();
     let clone_ms = clone_started.elapsed().as_secs_f64() * 1000.0;
     doc.version = version;
-    let styles_started = std::time::Instant::now();
+    let styles_started = iced::time::Instant::now();
     sync_current_styles_on_save(&mut doc);
     let styles_ms = styles_started.elapsed().as_secs_f64() * 1000.0;
-    let dimensions_started = std::time::Instant::now();
+    let dimensions_started = iced::time::Instant::now();
     crate::modules::draw::modify::explode::bake_dimension_blocks(&mut doc);
     let dimensions_ms = dimensions_started.elapsed().as_secs_f64() * 1000.0;
-    let write_started = std::time::Instant::now();
+    let write_started = iced::time::Instant::now();
     let result = match ext.to_lowercase().as_str() {
         "dxf" => DxfWriter::new(&doc).write_to_vec().map_err(|e| e.to_string()),
         _ => {

src/io/pdf_export.rs

@@ -49,12 +49,14 @@ pub async fn pick_pdf_path_owned(_stem: String) -> Option<std::path::PathBuf> {
 }
 
 /// mm to PDF points (1 mm = 2.834645 pt).
+#[cfg(not(target_arch = "wasm32"))]
 const MM_TO_PT: f32 = 2.834645;
 /// `wire.line_weight_px` is the on-screen pixel weight: mm × (96/25.4) × 2.0,
 /// where the ×2 is a screen-legibility boost (see render.rs). Print wants the
 /// true physical weight, so undo both the 96-dpi scaling and the boost before
 /// converting to points — otherwise weights export ~2× too heavy in pixels
 /// (and the old `× 0.35278` left them inconsistent with the physical mm).
+#[cfg(not(target_arch = "wasm32"))]
 const LW_PX_TO_PT: f32 = MM_TO_PT / ((96.0 / 25.4) * 2.0);
 
 // ── Public entry point ────────────────────────────────────────────────────

src/io/single_instance.rs

@@ -420,7 +420,7 @@ mod tests {
             std::thread::sleep(IO_TIMEOUT * 3);
         });
         let s = TcpStream::connect((Ipv4Addr::LOCALHOST, port)).unwrap();
-        let start = std::time::Instant::now();
+        let start = iced::time::Instant::now();
         assert!(!handoff(s, &[PathBuf::from("/tmp/a.dwg")]));
         assert!(
             start.elapsed() < IO_TIMEOUT * 2,

src/io/thumbnail.rs

@@ -388,6 +388,7 @@ pub fn extract_to_png(input: &std::path::Path, output: &std::path::Path, size: u
 /// Read a DWG's embedded preview and decode it to an iced image handle for the
 /// Start page's recent-file thumbnails. `None` for DXF/other files, a missing
 /// preview, or an undecodable format (WMF).
+#[cfg(not(target_arch = "wasm32"))]
 pub fn read_handle(path: &std::path::Path) -> Option<iced::widget::image::Handle> {
     let img = dwg_thumbnailer::extract(path, MAX_DIM)?;
     let (w, h) = (img.width(), img.height());