v0.0.39: contacts online, message wrap, tab complete, multipart, OTPK

FC-P2-T6: /contacts shows online status (● online, ○ offline)
FC-P6-T6: Long messages word-wrap into multiple lines with aligned indent
FC-P6-T7: Tab completion for 33 slash commands (4 new tests)
FC-P8-T6: sendDocument accepts both JSON and multipart form data
OTPK: Auto-replenish on TUI startup when supply < 3 (generates 10 new)

135 tests passing (was 127)

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

warzone/crates/warzone-client/src/net.rs

@@ -113,6 +113,35 @@ impl ServerClient {
         Ok(())
     }
 
+    /// Check how many one-time pre-keys remain on the server.
+    pub async fn otpk_count(&self, fingerprint: &str) -> Result<u64> {
+        let fp_clean: String = fingerprint.chars().filter(|c| c.is_ascii_hexdigit()).collect();
+        let resp: serde_json::Value = self.client
+            .get(format!("{}/v1/keys/{}/otpk-count", self.base_url, fp_clean))
+            .send()
+            .await
+            .context("failed to check OTPK count")?
+            .json()
+            .await
+            .context("failed to parse OTPK count")?;
+        Ok(resp.get("count").and_then(|v| v.as_u64()).unwrap_or(0))
+    }
+
+    /// Upload additional one-time pre-keys.
+    pub async fn replenish_otpks(&self, fingerprint: &str, keys: Vec<(u32, [u8; 32])>) -> Result<()> {
+        let fp_clean: String = fingerprint.chars().filter(|c| c.is_ascii_hexdigit()).collect();
+        let otpks: Vec<serde_json::Value> = keys.iter().map(|(id, pubkey)| {
+            serde_json::json!({"id": id, "public_key": hex::encode(pubkey)})
+        }).collect();
+        self.client
+            .post(format!("{}/v1/keys/replenish", self.base_url))
+            .json(&serde_json::json!({"fingerprint": fp_clean, "one_time_pre_keys": otpks}))
+            .send()
+            .await
+            .context("failed to replenish OTPKs")?;
+        Ok(())
+    }
+
     /// Poll for messages addressed to us.
     pub async fn poll_messages(&self, fingerprint: &str) -> Result<Vec<Vec<u8>>> {
         let fp_clean: String = fingerprint.chars().filter(|c| c.is_ascii_hexdigit()).collect();