fix(protocol,bridge): wire nickname validation to connect (TODO-045)

Add validate_nickname() to ProtocolClient::connect() and bridge
connect(). Trim whitespace, reject empty, truncate to 30 chars.
Re-export validate_nickname from protocol and core.

crates/chanora_protocol/src/adapter.rs

@@ -40,8 +40,8 @@ use tsproto_packets::packets::{Direction, Flags, InAudioBuf, OutCommand, OutPack
 use tsproto_types::ClientType;
 
 use crate::dto::{
-    ChannelId, ChannelInfo, ChatMessage, ClientId, ClientInfo, ClientProfile, MessageTarget,
-    ProtocolDelta, ServerActivity, ServerSnapshot,
+    validate_nickname, ChannelId, ChannelInfo, ChatMessage, ClientId, ClientInfo, ClientProfile,
+    MessageTarget, ProtocolDelta, ServerActivity, ServerSnapshot,
 };
 use crate::poke_limiter::PokeLimiter;
 use crate::ProtocolError;
@@ -324,9 +324,10 @@ impl ProtocolClient {
         if cfg.address.trim().is_empty() {
             return Err(ProtocolError::Invalid("address is empty".to_string()));
         }
-        if cfg.nickname.trim().is_empty() {
-            return Err(ProtocolError::Invalid("nickname is empty".to_string()));
-        }
+        let validated_nick = validate_nickname(&cfg.nickname)
+            .map_err(|e| ProtocolError::Invalid(e.to_string()))?;
+        let mut cfg = cfg;
+        cfg.nickname = validated_nick;
 
         let (tx, rx) = mpsc::channel::<Request>(8);
         let (voice_out_tx, voice_out_rx) = mpsc::channel::<OutPacket>(64);

crates/chanora_protocol/src/lib.rs

@@ -40,8 +40,8 @@ pub mod poke_limiter;
 
 pub use adapter::{ConnectConfig, DisconnectReason, InboundVoice, ProtocolClient, SnapshotProbe};
 pub use dto::{
-    ChannelId, ChannelInfo, ChatMessage, ClientId, ClientInfo, ClientProfile, MessageTarget,
-    PokeStrength, ProtocolDelta, ServerActivity, ServerSnapshot,
+    validate_nickname, ChannelId, ChannelInfo, ChatMessage, ClientId, ClientInfo, ClientProfile,
+    MessageTarget, PokeStrength, ProtocolDelta, ServerActivity, ServerSnapshot,
 };
 pub use poke_limiter::PokeLimiter;