fix: various small fixes and improvements

- Add 'skipped' to authentication result enum in OpenAPI spec
- Fix optional chaining on bimiResult.details check
- Add rbls field to AppConfig interface
- Restrict theme storage to valid 'light'/'dark' values only
- Fix null coalescing for blacklist result data
- Fix survey source to use domain instead of ip

web/src/lib/components/SummaryCard.svelte

@@ -331,7 +331,7 @@
                     highlight: { color: "good", bold: true },
                     link: "#dns-bimi",
                 });
-                if (bimiResult.details && bimiResult.details.indexOf("declined") == 0) {
+                if (bimiResult?.details && bimiResult.details.indexOf("declined") == 0) {
                     segments.push({ text: " declined to participate" });
                 } else if (bimiResult?.result === "fail") {
                     segments.push({ text: " but " });

web/src/lib/stores/config.ts

@@ -25,6 +25,7 @@ interface AppConfig {
     report_retention?: number;
     survey_url?: string;
     custom_logo_url?: string;
+    rbls?: string[];
 }
 
 const defaultConfig: AppConfig = {

web/src/lib/stores/theme.ts

@@ -26,7 +26,7 @@ const getInitialTheme = () => {
     if (!browser) return "light";
 
     const stored = localStorage.getItem("theme");
-    if (stored) return stored;
+    if (stored === "light" || stored === "dark") return stored;
 
     return window.matchMedia("(prefers-color-scheme: dark)").matches ? "dark" : "light";
 };