feat: Add inbox relay dropdown for NIP-17 DMs

- Update RelaysDropdown to show each participant's private inbox relays
- Uses Inbox icon for NIP-17 (distinguishing from Wifi for other protocols)
- Shows relay count per participant with connection status
- Handles loading state and empty relay configurations
- Show NIP-17 badge in chat header for DM conversations

src/components/ChatViewer.tsx

@@ -804,7 +804,8 @@ export function ChatViewer({
             <MembersDropdown participants={derivedParticipants} />
             <RelaysDropdown conversation={conversation} />
             {(conversation.type === "group" ||
-              conversation.type === "live-chat") && (
+              conversation.type === "live-chat" ||
+              conversation.type === "dm") && (
               <button
                 onClick={handleNipClick}
                 className="rounded bg-muted px-1.5 py-0.5 font-mono hover:bg-muted/80 transition-colors cursor-pointer"

src/components/chat/RelaysDropdown.tsx

@@ -1,37 +1,84 @@
-import { Wifi } from "lucide-react";
+import { useState, useEffect } from "react";
+import { Wifi, Inbox } from "lucide-react";
 import {
   DropdownMenu,
   DropdownMenuContent,
   DropdownMenuTrigger,
 } from "@/components/ui/dropdown-menu";
 import { RelayLink } from "@/components/nostr/RelayLink";
+import { UserName } from "@/components/nostr/UserName";
 import { useRelayState } from "@/hooks/useRelayState";
 import { getConnectionIcon, getAuthIcon } from "@/lib/relay-status-utils";
 import { normalizeRelayURL } from "@/lib/relay-url";
 import type { Conversation } from "@/types/chat";
+import { Nip17Adapter } from "@/lib/chat/adapters/nip-17-adapter";
 
 interface RelaysDropdownProps {
   conversation: Conversation;
 }
 
+/** Inbox relay info per participant */
+interface ParticipantRelays {
+  pubkey: string;
+  relays: string[];
+  loading: boolean;
+}
+
 /**
  * RelaysDropdown - Shows relay count and list with connection status
- * Similar to relay indicators in ReqViewer
+ * For NIP-17 DMs, shows each participant's private inbox relays
  */
 export function RelaysDropdown({ conversation }: RelaysDropdownProps) {
   const { relays: relayStates } = useRelayState();
+  const [participantRelays, setParticipantRelays] = useState<
+    ParticipantRelays[]
+  >([]);
 
-  // Get relays for this conversation (immutable pattern)
+  // For NIP-17, fetch inbox relays for each participant
+  useEffect(() => {
+    if (conversation.protocol !== "nip-17") return;
+
+    const adapter = new Nip17Adapter();
+    const participants = conversation.participants;
+
+    // Initialize with loading state
+    setParticipantRelays(
+      participants.map((p) => ({
+        pubkey: p.pubkey,
+        relays: [],
+        loading: true,
+      })),
+    );
+
+    // Fetch relays for each participant
+    const fetchAll = async () => {
+      const results = await Promise.all(
+        participants.map(async (p) => {
+          try {
+            const relays = await adapter.getInboxRelays(p.pubkey);
+            return { pubkey: p.pubkey, relays, loading: false };
+          } catch {
+            return { pubkey: p.pubkey, relays: [], loading: false };
+          }
+        }),
+      );
+      setParticipantRelays(results);
+    };
+
+    fetchAll();
+  }, [conversation.protocol, conversation.participants]);
+
+  // Get relays for non-NIP-17 conversations
   const liveActivityRelays = conversation.metadata?.liveActivity?.relays;
-  const relays: string[] =
+  const standardRelays: string[] =
     Array.isArray(liveActivityRelays) && liveActivityRelays.length > 0
       ? liveActivityRelays
       : conversation.metadata?.relayUrl
         ? [conversation.metadata.relayUrl]
         : [];
 
-  // Pre-compute normalized URLs and state lookups in a single pass (O(n))
-  const relayData = relays.map((url) => {
+  // Pre-compute normalized URLs and state lookups for standard relays
+  const standardRelayData = standardRelays.map((url) => {
     let normalizedUrl: string;
     try {
       normalizedUrl = normalizeRelayURL(url);
@@ -47,29 +94,127 @@ export function RelaysDropdown({ conversation }: RelaysDropdownProps) {
     };
   });
 
-  // Count connected relays
-  const connectedCount = relayData.filter((r) => r.isConnected).length;
+  // For NIP-17, compute relay data per participant
+  const nip17RelayData = participantRelays.map((p) => ({
+    ...p,
+    relayData: p.relays.map((url) => {
+      let normalizedUrl: string;
+      try {
+        normalizedUrl = normalizeRelayURL(url);
+      } catch {
+        normalizedUrl = url;
+      }
+      const state = relayStates[normalizedUrl];
+      return {
+        url,
+        normalizedUrl,
+        state,
+        isConnected: state?.connectionState === "connected",
+      };
+    }),
+  }));
 
-  if (relays.length === 0) {
-    return null; // Don't show if no relays
+  // Count total and connected relays
+  const isNip17 = conversation.protocol === "nip-17";
+  const totalRelays = isNip17
+    ? participantRelays.reduce((sum, p) => sum + p.relays.length, 0)
+    : standardRelays.length;
+
+  const connectedCount = isNip17
+    ? nip17RelayData.reduce(
+        (sum, p) => sum + p.relayData.filter((r) => r.isConnected).length,
+        0,
+      )
+    : standardRelayData.filter((r) => r.isConnected).length;
+
+  // Check if still loading
+  const isLoading = isNip17 && participantRelays.some((p) => p.loading);
+
+  if (!isNip17 && standardRelays.length === 0) {
+    return null; // Don't show if no relays for non-NIP-17
   }
 
+  // For NIP-17 DMs, always show the button (even if relays are loading or empty)
+  if (isNip17) {
+    return (
+      <DropdownMenu>
+        <DropdownMenuTrigger asChild>
+          <button className="flex items-center gap-1 text-muted-foreground hover:text-foreground transition-colors">
+            <Inbox className="size-3" />
+            <span>
+              {isLoading ? "..." : `${connectedCount}/${totalRelays}`}
+            </span>
+          </button>
+        </DropdownMenuTrigger>
+        <DropdownMenuContent align="end" className="w-72">
+          <div className="px-2 py-1.5 text-xs font-medium text-muted-foreground">
+            Private Inbox Relays (NIP-17)
+          </div>
+          <div className="space-y-2 p-1 max-h-64 overflow-y-auto">
+            {nip17RelayData.map(({ pubkey, relays, loading, relayData }) => (
+              <div key={pubkey} className="space-y-1">
+                <div className="flex items-center gap-2 px-2 py-1 bg-muted/30 rounded text-xs">
+                  <UserName pubkey={pubkey} className="font-medium truncate" />
+                  <span className="text-muted-foreground ml-auto">
+                    {loading
+                      ? "..."
+                      : `${relays.length} relay${relays.length !== 1 ? "s" : ""}`}
+                  </span>
+                </div>
+                {loading ? (
+                  <div className="px-2 py-1 text-xs text-muted-foreground">
+                    Loading...
+                  </div>
+                ) : relays.length === 0 ? (
+                  <div className="px-2 py-1 text-xs text-muted-foreground italic">
+                    No inbox relays configured
+                  </div>
+                ) : (
+                  relayData.map(({ url, state }) => {
+                    const connIcon = getConnectionIcon(state);
+                    const authIcon = getAuthIcon(state);
+                    return (
+                      <div
+                        key={url}
+                        className="flex items-center gap-2 px-2 py-1 rounded hover:bg-muted/50 transition-colors ml-2"
+                      >
+                        <div className="flex items-center gap-1 flex-shrink-0">
+                          {connIcon.icon}
+                          {authIcon.icon}
+                        </div>
+                        <RelayLink
+                          url={url}
+                          className="text-xs truncate flex-1 min-w-0"
+                        />
+                      </div>
+                    );
+                  })
+                )}
+              </div>
+            ))}
+          </div>
+        </DropdownMenuContent>
+      </DropdownMenu>
+    );
+  }
+
+  // Standard relay display for other protocols
   return (
     <DropdownMenu>
       <DropdownMenuTrigger asChild>
         <button className="flex items-center gap-1 text-muted-foreground hover:text-foreground transition-colors">
           <Wifi className="size-3" />
           <span>
-            {connectedCount}/{relays.length}
+            {connectedCount}/{standardRelays.length}
           </span>
         </button>
       </DropdownMenuTrigger>
       <DropdownMenuContent align="end" className="w-64">
         <div className="px-2 py-1.5 text-xs font-medium text-muted-foreground">
-          Relays ({relays.length})
+          Relays ({standardRelays.length})
         </div>
         <div className="space-y-1 p-1">
-          {relayData.map(({ url, state }) => {
+          {standardRelayData.map(({ url, state }) => {
             const connIcon = getConnectionIcon(state);
             const authIcon = getAuthIcon(state);