v0.0.6: Delivery receipts (sent/delivered/read)

Protocol:
- WireMessage::Receipt { sender_fingerprint, message_id, receipt_type }
- ReceiptType enum: Delivered, Read
- id field added to KeyExchange and Message variants
- Receipts are plaintext (not encrypted) — contain only ID + type

Web client:
- Auto-sends Delivered receipt on successful decrypt
- Tracks sent message IDs with receipt status
- Displays: ✓ (sent, gray), ✓✓ (delivered, white), ✓✓ (read, blue)
- Receipt indicators update live via DOM reference

CLI TUI:
- Auto-sends Delivered receipt back to sender on decrypt
- Tracks receipt status per message ID
- Displays receipt indicators after sent messages

WASM:
- create_receipt() function for web client
- encrypt_with_id/encrypt_key_exchange_with_id for tracking
- decrypt_wire_message handles Receipt variant

17/17 protocol tests pass. Zero warnings.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

warzone/crates/warzone-client/src/cli/recv.rs

@@ -29,6 +29,7 @@ pub async fn run(server_url: &str, identity: &IdentityKeyPair) -> Result<()> {
     for raw in &messages {
         match bincode::deserialize::<WireMessage>(raw) {
             Ok(WireMessage::KeyExchange {
+                id: _,
                 sender_fingerprint,
                 sender_identity_encryption_key,
                 ephemeral_public,
@@ -80,6 +81,7 @@ pub async fn run(server_url: &str, identity: &IdentityKeyPair) -> Result<()> {
                 }
             }
             Ok(WireMessage::Message {
+                id: _,
                 sender_fingerprint,
                 ratchet_message,
             }) => {
@@ -105,6 +107,16 @@ pub async fn run(server_url: &str, identity: &IdentityKeyPair) -> Result<()> {
                     }
                 }
             }
+            Ok(WireMessage::Receipt {
+                sender_fingerprint,
+                message_id,
+                receipt_type,
+            }) => {
+                println!(
+                    "  [receipt] {} acknowledged message {} ({:?})",
+                    sender_fingerprint, message_id, receipt_type
+                );
+            }
             Err(e) => {
                 eprintln!("  failed to deserialize message: {}", e);
             }

warzone/crates/warzone-client/src/cli/send.rs

@@ -27,6 +27,7 @@ pub async fn run(recipient_fp: &str, message: &str, server_url: &str, identity:
         db.save_session(&recipient, state)?;
 
         WireMessage::Message {
+            id: uuid::Uuid::new_v4().to_string(),
             sender_fingerprint: our_pub.fingerprint.to_string(),
             ratchet_message: encrypted,
         }
@@ -51,6 +52,7 @@ pub async fn run(recipient_fp: &str, message: &str, server_url: &str, identity:
         db.save_session(&recipient, &state)?;
 
         WireMessage::KeyExchange {
+            id: uuid::Uuid::new_v4().to_string(),
             sender_fingerprint: our_pub.fingerprint.to_string(),
             sender_identity_encryption_key: *our_pub.encryption.as_bytes(),
             ephemeral_public: *x3dh_result.ephemeral_public.as_bytes(),