fix: handle undefined values in Zoom onboarding prompts

- Wrap prompter.text() results with String() and trim()
- Fixes TypeError when accessing .includes() on undefined
- Ensures all input values are properly converted to strings

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

src/channels/plugins/onboarding/zoom.ts

@@ -82,32 +82,51 @@ export const zoomOnboardingAdapter: ChannelOnboardingAdapter = {
 
     await noteZoomHelp(prompter);
 
-    const clientId = await prompter.text({
+    const clientId = String(
+      await prompter.text({
         message: "Zoom Client ID",
         placeholder: "lfcOyplW...",
-      validate: (value) => (value?.trim() ? undefined : "Client ID is required"),
+        validate: (value) => {
-    });
+          const trimmed = String(value ?? "").trim();
+          return trimmed ? undefined : "Client ID is required";
+        },
+      }),
+    ).trim();
 
-    const clientSecret = await prompter.text({
+    const clientSecret = String(
+      await prompter.text({
         message: "Zoom Client Secret",
         placeholder: "rm48DW7m...",
-      validate: (value) => (value?.trim() ? undefined : "Client Secret is required"),
+        validate: (value) => {
-    });
+          const trimmed = String(value ?? "").trim();
+          return trimmed ? undefined : "Client Secret is required";
+        },
+      }),
+    ).trim();
 
-    const botJid = await prompter.text({
+    const botJid = String(
+      await prompter.text({
         message: "Zoom Bot JID",
         placeholder: "bot@xmpp.zoom.us",
-      validate: (value) =>
+        validate: (value) => {
-        value?.includes("@xmpp")
+          const str = String(value ?? "").trim();
+          return str.includes("@xmpp")
             ? undefined
-          : "Bot JID should contain @xmpp.zoom.us or @xmppdev.zoom.us",
+            : "Bot JID should contain @xmpp.zoom.us or @xmppdev.zoom.us";
-    });
+        },
+      }),
+    ).trim();
 
-    const secretToken = await prompter.text({
+    const secretToken = String(
+      await prompter.text({
         message: "Zoom Secret Token",
         placeholder: "kVJhHKxo...",
-      validate: (value) => (value?.trim() ? undefined : "Secret Token is required"),
+        validate: (value) => {
-    });
+          const trimmed = String(value ?? "").trim();
+          return trimmed ? undefined : "Secret Token is required";
+        },
+      }),
+    ).trim();
 
     // Determine environment from Bot JID
     const isDev = botJid.includes("@xmppdev");