Add repository filter dropdown to findings page

Adds a repo_filter signal and fetches the repository list to populate
a select dropdown before existing severity/type/status filters,
allowing users to filter findings by specific repository.

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

compliance-dashboard/src/pages/findings.rs

@@ -11,14 +11,20 @@ pub fn FindingsPage() -> Element {
     let mut severity_filter = use_signal(String::new);
     let mut type_filter = use_signal(String::new);
     let mut status_filter = use_signal(String::new);
+    let mut repo_filter = use_signal(String::new);
+
+    let repos = use_resource(|| async {
+        crate::infrastructure::repositories::fetch_repositories(1).await.ok()
+    });
 
     let findings = use_resource(move || {
         let p = page();
         let sev = severity_filter();
         let typ = type_filter();
         let stat = status_filter();
+        let repo = repo_filter();
         async move {
-            crate::infrastructure::findings::fetch_findings(p, sev, typ, stat, String::new())
+            crate::infrastructure::findings::fetch_findings(p, sev, typ, stat, repo)
                 .await
                 .ok()
         }
@@ -31,6 +37,26 @@ pub fn FindingsPage() -> Element {
         }
 
         div { class: "filter-bar",
+            select {
+                onchange: move |e| { repo_filter.set(e.value()); page.set(1); },
+                option { value: "", "All Repositories" }
+                {
+                    match &*repos.read() {
+                        Some(Some(resp)) => rsx! {
+                            for repo in &resp.data {
+                                {
+                                    let id = repo.id.as_ref().map(|id| id.to_hex()).unwrap_or_default();
+                                    let name = repo.name.clone();
+                                    rsx! {
+                                        option { value: "{id}", "{name}" }
+                                    }
+                                }
+                            }
+                        },
+                        _ => rsx! {},
+                    }
+                }
+            }
             select {
                 onchange: move |e| { severity_filter.set(e.value()); page.set(1); },
                 option { value: "", "All Severities" }