Satisfy clippy's nonminimal_bool on rustc 1.96

Four sites already on main that `cargo xtask ci` cannot get past with the
current toolchain; each rewrite is the one clippy suggests and changes no
behaviour. `!x.is_some_and(f)` becomes `x.is_none_or(!f)`, and pdf_bounds
folds `!(a && b) || !c` into `!(a && b && c)` by De Morgan.

Unrelated to the merge they are committed beside; separated so that merge
stays a merge.

crates/engine/src/tests_file_guard.rs

@@ -158,7 +158,7 @@ fn offenders(crates_dir: &Path) -> (Vec<String>, usize) {
     for path in files {
         let rel = path.strip_prefix(crates_dir).unwrap_or(&path).to_string_lossy().replace('\\', "/");
         // `crates/<name>/src/...` only: build scripts, benches and `tests/` are not shipped code.
-        if !rel.split('/').nth(1).is_some_and(|d| d == "src") || is_test_file(&rel) || ALLOWED.iter().any(|(allowed, _)| *allowed == rel) {
+        if rel.split('/').nth(1).is_none_or(|d| d != "src") || is_test_file(&rel) || ALLOWED.iter().any(|(allowed, _)| *allowed == rel) {
             continue;
         }
         let Ok(text) = std::fs::read_to_string(&path) else { continue };

crates/render/src/pdf_bounds.rs

@@ -48,7 +48,7 @@ impl Bounds {
         }
         let Some(clip) = self.clips.last() else { return };
         let r = r.intersect(*clip);
-        if !(r.width() > 0.0 && r.height() > 0.0) || ![r.x0, r.y0, r.x1, r.y1].iter().all(|v| v.is_finite()) {
+        if !(r.width() > 0.0 && r.height() > 0.0 && [r.x0, r.y0, r.x1, r.y1].iter().all(|v| v.is_finite())) {
             return;
         }
         self.out = Some(self.out.map_or(r, |o| o.union(r)));

crates/ui-egui/src/lib.rs

@@ -950,7 +950,7 @@ impl DesignApp {
                 }
             }
             // Release only when the request actually replaces Find, including a native PDF picker.
-            if was_find && !self.ui.dialog.as_ref().is_some_and(|d| d.id == "findChange") {
+            if was_find && self.ui.dialog.as_ref().is_none_or(|d| d.id != "findChange") {
                 self.session.reset_find_scope();
             }
         }
@@ -1437,7 +1437,7 @@ impl DesignApp {
                 self.status(format!("{file}: {}", warnings.join("; ")));
                 // Find Font, offered for the document's missing fonts, stays up: the status line
                 // keeps the warnings.
-                if !self.ui.dialog.as_ref().is_some_and(|d| d.id == "findFont") {
+                if self.ui.dialog.as_ref().is_none_or(|d| d.id != "findFont") {
                     self.ui.dialog =
                         Some(dialogs::Dialog::new("alert", json!({"title": "Import Warnings", "file": file, "message": warnings.join("\n")})));
                 }