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/storage.rs

@@ -113,6 +113,22 @@ impl LocalDb {
         Ok(())
     }
 
+    /// Return the next available OTPK ID (one past the highest stored).
+    pub fn next_otpk_id(&self) -> u32 {
+        let mut max_id: Option<u32> = None;
+        for item in self.pre_keys.iter() {
+            if let Ok((k, _)) = item {
+                let key_str = String::from_utf8_lossy(&k);
+                if let Some(id_str) = key_str.strip_prefix("otpk:") {
+                    if let Ok(id) = id_str.parse::<u32>() {
+                        max_id = Some(max_id.map_or(id, |m: u32| m.max(id)));
+                    }
+                }
+            }
+        }
+        max_id.map_or(0, |m| m + 1)
+    }
+
     /// Load and remove a one-time pre-key secret.
     pub fn take_one_time_pre_key(&self, id: u32) -> Result<Option<StaticSecret>> {
         let key = format!("otpk:{}", id);