refactor: Remove bare pubkey support for communikeys

Removes support for opening communikeys with bare pubkeys (npub/hex),
reserving that format for DMs. Communikeys now require either:
1. naddr format (kind 10222) - preferred
2. relay'pubkey format - with explicit relay hint

Changes:
- Removed bare pubkey parsing from parseIdentifier()
- Updated command reconstructor to require relay hints
- Updated getChatIdentifier to require relay URL
- Updated documentation to remove bare pubkey examples

This ensures communikeys always have relay hints for better
connectivity, while keeping bare pubkey format available for future
DM implementation.

src/components/ChatViewer.tsx

@@ -139,7 +139,7 @@ function isLiveActivityMetadata(value: unknown): value is LiveActivityMetadata {
  * Returns a string that can be passed to the `chat` command to open this conversation
  *
  * For NIP-29 groups: relay'group-id (without wss:// prefix)
- * For communikeys (NIP-CC): relay'pubkey or just pubkey
+ * For communikeys (NIP-CC): relay'pubkey (relay hint required)
  * For NIP-53 live activities: naddr1... encoding
  */
 function getChatIdentifier(conversation: Conversation): string | null {
@@ -156,16 +156,12 @@ function getChatIdentifier(conversation: Conversation): string | null {
   if (conversation.protocol === "communikeys") {
     const pubkey = conversation.metadata?.groupId; // For communikeys, groupId is the pubkey
     const relayUrl = conversation.metadata?.relayUrl;
-    if (!pubkey) return null;
 
-    // If there's a relay hint, include it
-    if (relayUrl) {
-      const cleanRelay = relayUrl.replace(/^wss?:\/\//, "");
-      return `${cleanRelay}'${pubkey}`;
-    }
+    // Communikeys require relay hints (from naddr or relay'pubkey format)
+    if (!pubkey || !relayUrl) return null;
 
-    // Otherwise just return the pubkey
-    return pubkey;
+    const cleanRelay = relayUrl.replace(/^wss?:\/\//, "");
+    return `${cleanRelay}'${pubkey}`;
   }
 
   if (conversation.protocol === "nip-53") {

src/lib/chat/adapters/nip-29-adapter.ts

@@ -45,9 +45,7 @@ export class Nip29Adapter extends ChatProtocolAdapter {
    *   - relay.example.com'bitcoin-dev (NIP-29, wss:// prefix is optional)
    *   - naddr1... (kind 39000 group metadata address, NIP-29)
    *   - naddr1... (kind 10222 communikey definition, NIP-CC)
-   *   - relay.example.com'npub1xxx (NIP-CC communikey)
-   *   - npub1xxx (NIP-CC communikey, relays from kind 10222)
-   *   - hex-pubkey (NIP-CC communikey, relays from kind 10222)
+   *   - relay.example.com'npub1xxx (NIP-CC communikey with relay hint)
    */
   parseIdentifier(input: string): ProtocolIdentifier | null {
     // Try naddr format first
@@ -126,17 +124,6 @@ export class Nip29Adapter extends ChatProtocolAdapter {
       };
     }
 
-    // NIP-CC bare communikey format: npub1xxx or hex pubkey
-    // Check if input is a valid pubkey (relays will be fetched from kind 10222)
-    const pubkey = this.extractPubkey(input);
-    if (pubkey) {
-      return {
-        type: "group",
-        value: pubkey,
-        relays: [], // Will be resolved from kind 10222
-      };
-    }
-
     return null;
   }
 

src/lib/command-reconstructor.ts

@@ -116,9 +116,9 @@ export function reconstructCommand(window: WindowInstance): string {
           }
         }
 
-        // NIP-CC communikeys: chat npub1... or chat relay'npub1...
+        // NIP-CC communikeys: chat relay'npub1... (relay hint required)
         if (protocol === "communikeys" && identifier.type === "group") {
-          const relayUrl = identifier.relays?.[0] || "";
+          const relayUrl = identifier.relays?.[0];
           const groupId = identifier.value; // This is a pubkey
 
           if (relayUrl && groupId) {
@@ -127,10 +127,8 @@ export function reconstructCommand(window: WindowInstance): string {
             return `chat ${cleanRelay}'${groupId}`;
           }
 
-          // If no relay hint, just return the pubkey
-          if (groupId) {
-            return `chat ${groupId}`;
-          }
+          // Fallback: communikeys should always have relay hints
+          return "chat";
         }
 
         // NIP-53 live activities: chat naddr1...