feat: implement audit logs system, request extractor, admin log panel, and dedicated documentation

- Added an enterprise-grade, request-scoped AuditLogger extractor in Axum.
- Configured MongoDB persistence for structured, replayable audit logs (capturing timestamp, user, action, type, payload snapshot, client IP with proxy header support, and User-Agent).
- Created a live Administrator console at /auth/audit to filter and inspect log events.
- Re-architected documentation by moving Design Wiki pages out of /components into a dedicated /docs route.
- Published logging architecture documentation at /docs/logging.

src/main.rs

@@ -1,9 +1,10 @@
 mod common;
 mod auth;
 mod tasks;
+mod audit;
 mod developers;
 mod main_view;
-mod components;
+mod docs;
 
 use axum::{extract::FromRef, Router};
 use std::net::SocketAddr;
@@ -15,6 +16,7 @@ use crate::common::database::connect_db;
 use crate::auth::repository::MongoUserRepository;
 use crate::tasks::repository::MongoTaskRepository;
 use crate::developers::repository::MongoDeveloperRepository;
+use crate::audit::repository::MongoAuditRepository;
 
 #[derive(Clone)]
 struct AppState {
@@ -23,6 +25,7 @@ struct AppState {
     user_repo: MongoUserRepository,
     task_repo: MongoTaskRepository,
     dev_repo: MongoDeveloperRepository,
+    audit_repo: MongoAuditRepository,
 }
 
 impl FromRef<AppState> for Config {
@@ -55,6 +58,12 @@ impl FromRef<AppState> for MongoDeveloperRepository {
     }
 }
 
+impl FromRef<AppState> for MongoAuditRepository {
+    fn from_ref(state: &AppState) -> Self {
+        state.audit_repo.clone()
+    }
+}
+
 #[tokio::main]
 async fn main() -> Result<(), Box<dyn std::error::Error>> {
     // 1. Initialize logging
@@ -74,6 +83,7 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
     let user_repo = MongoUserRepository::new(db.clone());
     let task_repo = MongoTaskRepository::new(db.clone());
     let dev_repo = MongoDeveloperRepository::new(db.clone());
+    let audit_repo = MongoAuditRepository::new(db.clone());
 
     // Auto-provision initial administrator if users collection is empty
     let users_count = db.collection::<crate::auth::models::User>("users")
@@ -118,15 +128,17 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
         user_repo,
         task_repo,
         dev_repo,
+        audit_repo,
     };
 
     // 6. Build and merge routers by use-case
     let app = Router::new()
         .merge(main_view::router())
-        .merge(components::router())
+        .merge(docs::router())
         .merge(auth::router())
         .merge(tasks::router())
         .merge(developers::router())
+        .merge(audit::router())
         .with_state(state);
 
     // 7. Bind address and run server
@@ -137,7 +149,7 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
     info!("Listening on http://{}", host_addr);
 
     let listener = tokio::net::TcpListener::bind(host_addr).await?;
-    axum::serve(listener, app).await?;
+    axum::serve(listener, app.into_make_service_with_connect_info::<SocketAddr>()).await?;
 
     Ok(())
 }