feat: implement real admin authentication and password management

- Added 'users' table to database with bcrypt hashing.
- Refactored login to verify against the database.
- Implemented 'Security' section in settings to allow changing the admin password.
- Initialized system with default user 'admin' and password 'admin'.

Cargo.lock

@@ -313,6 +313,19 @@ version = "1.8.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2af50177e190e07a26ab74f8b1efbfe2ef87da2116221318cb1c2e82baf7de06"
 
+[[package]]
+name = "bcrypt"
+version = "0.15.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e65938ed058ef47d92cf8b346cc76ef48984572ade631927e9937b5ffc7662c7"
+dependencies = [
+ "base64 0.22.1",
+ "blowfish",
+ "getrandom 0.2.17",
+ "subtle",
+ "zeroize",
+]
+
 [[package]]
 name = "bit-set"
 version = "0.5.3"
@@ -352,6 +365,16 @@ dependencies = [
  "generic-array",
 ]
 
+[[package]]
+name = "blowfish"
+version = "0.9.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e412e2cd0f2b2d93e02543ceae7917b3c70331573df19ee046bcbc35e45e87d7"
+dependencies = [
+ "byteorder",
+ "cipher",
+]
+
 [[package]]
 name = "bstr"
 version = "1.12.1"
@@ -429,6 +452,16 @@ dependencies = [
  "windows-link",
 ]
 
+[[package]]
+name = "cipher"
+version = "0.4.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "773f3b9af64447d2ce9850330c473515014aa235e6a783b02db81ff39e4a3dad"
+dependencies = [
+ "crypto-common",
+ "inout",
+]
+
 [[package]]
 name = "colored"
 version = "3.1.1"
@@ -1428,6 +1461,15 @@ dependencies = [
  "serde_core",
 ]
 
+[[package]]
+name = "inout"
+version = "0.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "879f10e63c20629ecabbb64a8010319738c66a5cd0c29b02d63d272b03751d01"
+dependencies = [
+ "generic-array",
+]
+
 [[package]]
 name = "insta"
 version = "1.46.3"
@@ -1571,6 +1613,7 @@ dependencies = [
  "axum",
  "axum-extra",
  "base64 0.21.7",
+ "bcrypt",
  "chrono",
  "config",
  "dotenvy",

Cargo.toml

@@ -46,6 +46,7 @@ mime_guess = "2.0"
 # ========== Error Handling & Utilities ==========
 anyhow = "1.0"
 thiserror = "1.0"
+bcrypt = "0.15"
 chrono = { version = "0.4", features = ["serde"] }
 uuid = { version = "1.0", features = ["v4", "serde"] }
 futures = "0.3"

src/dashboard/mod.rs

@@ -63,6 +63,7 @@ pub fn router(state: AppState) -> Router {
         // API endpoints
         .route("/api/auth/login", post(handle_login))
         .route("/api/auth/status", get(handle_auth_status))
+        .route("/api/auth/change-password", post(handle_change_password))
         .route("/api/usage/summary", get(handle_usage_summary))
         .route("/api/usage/time-series", get(handle_time_series))
         .route("/api/usage/clients", get(handle_clients_usage))
@@ -146,17 +147,45 @@ async fn handle_websocket_message(text: &str, state: &DashboardState) {
 }
 
 // Authentication handlers
-async fn handle_login(State(_state): State<DashboardState>) -> Json<ApiResponse<serde_json::Value>> {
+#[derive(Deserialize)]
-    // Simple authentication for demo
+struct LoginRequest {
-    // In production, this would validate credentials against a database
+    username: String,
+    password: String,
+}
+
+async fn handle_login(
+    State(state): State<DashboardState>,
+    Json(payload): Json<LoginRequest>,
+) -> Json<ApiResponse<serde_json::Value>> {
+    let pool = &state.app_state.db_pool;
+    
+    let user_result = sqlx::query("SELECT username, password_hash, role FROM users WHERE username = ?")
+        .bind(&payload.username)
+        .fetch_optional(pool)
+        .await;
+        
+    match user_result {
+        Ok(Some(row)) => {
+            let hash = row.get::<String, _>("password_hash");
+            if bcrypt::verify(&payload.password, &hash).unwrap_or(false) {
                 Json(ApiResponse::success(serde_json::json!({
-        "token": "demo-token-123456",
+                    "token": format!("session-{}", uuid::Uuid::new_v4()),
                     "user": {
-            "username": "admin",
+                        "username": row.get::<String, _>("username"),
                         "name": "Administrator",
-            "role": "Super Admin"
+                        "role": row.get::<String, _>("role")
                     }
                 })))
+            } else {
+                Json(ApiResponse::error("Invalid username or password".to_string()))
+            }
+        }
+        Ok(None) => Json(ApiResponse::error("Invalid username or password".to_string())),
+        Err(e) => {
+            warn!("Database error during login: {}", e);
+            Json(ApiResponse::error("Login failed due to system error".to_string()))
+        }
+    }
 }
 
 async fn handle_auth_status(State(_state): State<DashboardState>) -> Json<ApiResponse<serde_json::Value>> {
@@ -170,6 +199,49 @@ async fn handle_auth_status(State(_state): State<DashboardState>) -> Json<ApiRes
     })))
 }
 
+#[derive(Deserialize)]
+struct ChangePasswordRequest {
+    current_password: String,
+    new_password: String,
+}
+
+async fn handle_change_password(
+    State(state): State<DashboardState>,
+    Json(payload): Json<ChangePasswordRequest>,
+) -> Json<ApiResponse<serde_json::Value>> {
+    let pool = &state.app_state.db_pool;
+    
+    // For now, always change 'admin' user
+    let user_result = sqlx::query("SELECT password_hash FROM users WHERE username = 'admin'")
+        .fetch_one(pool)
+        .await;
+        
+    match user_result {
+        Ok(row) => {
+            let hash = row.get::<String, _>("password_hash");
+            if bcrypt::verify(&payload.current_password, &hash).unwrap_or(false) {
+                let new_hash = match bcrypt::hash(&payload.new_password, 12) {
+                    Ok(h) => h,
+                    Err(_) => return Json(ApiResponse::error("Failed to hash new password".to_string())),
+                };
+                
+                let update_result = sqlx::query("UPDATE users SET password_hash = ? WHERE username = 'admin'")
+                    .bind(new_hash)
+                    .execute(pool)
+                    .await;
+                    
+                match update_result {
+                    Ok(_) => Json(ApiResponse::success(serde_json::json!({ "message": "Password updated successfully" }))),
+                    Err(e) => Json(ApiResponse::error(format!("Failed to update database: {}", e))),
+                }
+            } else {
+                Json(ApiResponse::error("Current password incorrect".to_string()))
+            }
+        }
+        Err(e) => Json(ApiResponse::error(format!("User not found: {}", e))),
+    }
+}
+
 // Usage handlers
 async fn handle_usage_summary(State(state): State<DashboardState>) -> Json<ApiResponse<serde_json::Value>> {
     let pool = &state.app_state.db_pool;

src/database/mod.rs

@@ -115,6 +115,38 @@ async fn run_migrations(pool: &DbPool) -> Result<()> {
     .execute(pool)
     .await?;
 
+    // Create users table for dashboard access
+    sqlx::query(
+        r#"
+        CREATE TABLE IF NOT EXISTS users (
+            id INTEGER PRIMARY KEY AUTOINCREMENT,
+            username TEXT UNIQUE NOT NULL,
+            password_hash TEXT NOT NULL,
+            role TEXT DEFAULT 'admin',
+            created_at DATETIME DEFAULT CURRENT_TIMESTAMP
+        )
+        "#
+    )
+    .execute(pool)
+    .await?;
+
+    // Insert default admin user if none exists (default password: admin)
+    let user_count: (i64,) = sqlx::query_as("SELECT COUNT(*) FROM users")
+        .fetch_one(pool)
+        .await?;
+
+    if user_count.0 == 0 {
+        // 'admin' hashed with default cost (12)
+        let default_admin_hash = bcrypt::hash("admin", 12).unwrap();
+        sqlx::query(
+            "INSERT INTO users (username, password_hash, role) VALUES ('admin', ?, 'admin')"
+        )
+        .bind(default_admin_hash)
+        .execute(pool)
+        .await?;
+        info!("Created default admin user with password 'admin'");
+    }
+
     // Create indices
     sqlx::query(
         "CREATE INDEX IF NOT EXISTS idx_clients_client_id ON clients(client_id)"

static/js/pages/settings.js

@@ -55,6 +55,30 @@ class SettingsPage {
                     </div>
                 </div>
 
+                <div class="card">
+                    <div class="card-header">
+                        <h3 class="card-title"><i class="fas fa-lock"></i> Security</h3>
+                    </div>
+                    <div class="card-body">
+                        <p style="margin-bottom: 1rem; font-size: 0.875rem; color: var(--fg3);">Change the administrator password for the dashboard.</p>
+                        <div class="form-control">
+                            <label for="current-password">Current Password</label>
+                            <input type="password" id="current-password" placeholder="••••••••">
+                        </div>
+                        <div class="form-control">
+                            <label for="new-password">New Password</label>
+                            <input type="password" id="new-password" placeholder="••••••••">
+                        </div>
+                        <div class="form-control">
+                            <label for="confirm-password">Confirm New Password</label>
+                            <input type="password" id="confirm-password" placeholder="••••••••">
+                        </div>
+                        <button class="btn btn-primary" onclick="window.settingsPage.changePassword()">
+                            <i class="fas fa-key"></i> Update Password
+                        </button>
+                    </div>
+                </div>
+
                 <div class="card">
                     <div class="card-header">
                         <h3 class="card-title"><i class="fas fa-database"></i> Database & Registry</h3>
@@ -115,6 +139,42 @@ class SettingsPage {
         }
     }
 
+    async changePassword() {
+        const currentPassword = document.getElementById('current-password').value;
+        const newPassword = document.getElementById('new-password').value;
+        const confirmPassword = document.getElementById('confirm-password').value;
+
+        if (!currentPassword || !newPassword) {
+            window.authManager.showToast('Please fill in all password fields', 'error');
+            return;
+        }
+
+        if (newPassword !== confirmPassword) {
+            window.authManager.showToast('New passwords do not match', 'error');
+            return;
+        }
+
+        if (newPassword.length < 4) {
+            window.authManager.showToast('New password must be at least 4 characters', 'error');
+            return;
+        }
+
+        try {
+            await window.api.post('/auth/change-password', {
+                current_password: currentPassword,
+                new_password: newPassword
+            });
+            window.authManager.showToast('Password updated successfully', 'success');
+            
+            // Clear fields
+            document.getElementById('current-password').value = '';
+            document.getElementById('new-password').value = '';
+            document.getElementById('confirm-password').value = '';
+        } catch (error) {
+            window.authManager.showToast(error.message, 'error');
+        }
+    }
+
     setupEventListeners() {
         // ...
     }