Fix clippy warnings and fmt issues to pass CI

Replace expect/unwrap calls with safe alternatives, add Default impls
for parser structs and Toasts, fix redundant closures, collapse nested
ifs, remove unused import, and allow recursive-only-self/too-many-args
lints in compliance-graph.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

compliance-dast/src/crawler/mod.rs

@@ -95,8 +95,10 @@ impl WebCrawler {
             let document = Html::parse_document(&body);
 
             // Extract links
-            let link_selector = Selector::parse("a[href]")
-                .unwrap_or_else(|_| Selector::parse("a").expect("valid selector"));
+            let link_selector = match Selector::parse("a[href]") {
+                Ok(s) => s,
+                Err(_) => continue,
+            };
             for element in document.select(&link_selector) {
                 if let Some(href) = element.value().attr("href") {
                     if let Some(absolute_url) = self.resolve_url(&base, &url, href) {
@@ -110,10 +112,14 @@ impl WebCrawler {
             }
 
             // Extract forms
-            let form_selector = Selector::parse("form")
-                .unwrap_or_else(|_| Selector::parse("form").expect("valid selector"));
-            let input_selector = Selector::parse("input, select, textarea")
-                .unwrap_or_else(|_| Selector::parse("input").expect("valid selector"));
+            let form_selector = match Selector::parse("form") {
+                Ok(s) => s,
+                Err(_) => continue,
+            };
+            let input_selector = match Selector::parse("input, select, textarea") {
+                Ok(s) => s,
+                Err(_) => continue,
+            };
 
             for form in document.select(&form_selector) {
                 let action = form.value().attr("action").unwrap_or("");

compliance-dast/src/recon/mod.rs

@@ -121,10 +121,10 @@ impl ReconAgent {
 
         let body_lower = body.to_lowercase();
         for (tech, pattern) in &patterns {
-            if body_lower.contains(&pattern.to_lowercase()) {
-                if !result.technologies.contains(&tech.to_string()) {
-                    result.technologies.push(tech.to_string());
-                }
+            if body_lower.contains(&pattern.to_lowercase())
+                && !result.technologies.contains(&tech.to_string())
+            {
+                result.technologies.push(tech.to_string());
             }
         }
     }