Fix all compiler warnings across server and client

- Remove unused ServerConfig struct (config via CLI args)
- Remove unused otpks field from Database (not yet needed)
- Wire AppError into message routes with proper error propagation
- Remove unused imports in send.rs (Seed, MessageContent, etc.)
- Suppress dead_code on BundleResponse.fingerprint (needed by serde)

Zero warnings, 17/17 tests pass.

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

warzone/crates/warzone-server/src/config.rs

@@ -1,4 +1,2 @@
-pub struct ServerConfig {
-    pub bind_addr: String,
-    pub data_dir: String,
-}
+// Server configuration — currently handled via CLI args in main.rs.
+// This module will be used when file-based configuration is added.

warzone/crates/warzone-server/src/db.rs

@@ -3,7 +3,6 @@ use anyhow::Result;
 pub struct Database {
     pub keys: sled::Tree,
     pub messages: sled::Tree,
-    pub otpks: sled::Tree,
     _db: sled::Db,
 }
 
@@ -12,11 +11,9 @@ impl Database {
         let db = sled::open(data_dir)?;
         let keys = db.open_tree("keys")?;
         let messages = db.open_tree("messages")?;
-        let otpks = db.open_tree("otpks")?;
         Ok(Database {
             keys,
             messages,
-            otpks,
             _db: db,
         })
     }

warzone/crates/warzone-server/src/errors.rs

@@ -1,10 +1,12 @@
 use axum::http::StatusCode;
 use axum::response::{IntoResponse, Response};
 
+/// Wraps anyhow::Error into an axum-compatible error response.
 pub struct AppError(pub anyhow::Error);
 
 impl IntoResponse for AppError {
     fn into_response(self) -> Response {
+        tracing::error!("{:#}", self.0);
         (StatusCode::INTERNAL_SERVER_ERROR, self.0.to_string()).into_response()
     }
 }
@@ -14,3 +16,6 @@ impl<E: Into<anyhow::Error>> From<E> for AppError {
         AppError(err.into())
     }
 }
+
+/// Convenience type for route handlers.
+pub type AppResult<T> = Result<T, AppError>;

warzone/crates/warzone-server/src/routes/messages.rs

@@ -5,6 +5,7 @@ use axum::{
 };
 use serde::Deserialize;
 
+use crate::errors::AppResult;
 use crate::state::AppState;
 
 pub fn routes() -> Router<AppState> {
@@ -17,45 +18,41 @@ pub fn routes() -> Router<AppState> {
 #[derive(Deserialize)]
 struct SendRequest {
     to: String,
-    message: Vec<u8>, // bincode-serialized WarzoneMessage
+    message: Vec<u8>,
 }
 
 async fn send_message(
     State(state): State<AppState>,
     Json(req): Json<SendRequest>,
-) -> Json<serde_json::Value> {
-    // Append to recipient's queue
+) -> AppResult<Json<serde_json::Value>> {
     let key = format!("queue:{}", req.to);
-    let _ = state.db.messages.insert(
+    state.db.messages.insert(
         format!("{}:{}", key, uuid::Uuid::new_v4()).as_bytes(),
         req.message,
-    );
-    Json(serde_json::json!({ "ok": true }))
+    )?;
+    Ok(Json(serde_json::json!({ "ok": true })))
 }
 
 async fn poll_messages(
     State(state): State<AppState>,
     Path(fingerprint): Path<String>,
-) -> Json<Vec<String>> {
+) -> AppResult<Json<Vec<String>>> {
     let prefix = format!("queue:{}", fingerprint);
     let mut messages = Vec::new();
     for item in state.db.messages.scan_prefix(prefix.as_bytes()) {
-        if let Ok((_, value)) = item {
-            messages.push(base64::Engine::encode(
-                &base64::engine::general_purpose::STANDARD,
-                &value,
-            ));
-        }
+        let (_, value) = item?;
+        messages.push(base64::Engine::encode(
+            &base64::engine::general_purpose::STANDARD,
+            &value,
+        ));
     }
-    Json(messages)
+    Ok(Json(messages))
 }
 
 async fn ack_message(
     State(state): State<AppState>,
     Path(id): Path<String>,
-) -> Json<serde_json::Value> {
-    // Scan for and remove the message with this ID
-    // In a real implementation, we'd have a proper index
-    let _ = state.db.messages.remove(id.as_bytes());
-    Json(serde_json::json!({ "ok": true }))
+) -> AppResult<Json<serde_json::Value>> {
+    state.db.messages.remove(id.as_bytes())?;
+    Ok(Json(serde_json::json!({ "ok": true })))
 }