Add non-linear controller input curve and fix auth token error

- Replace linear controller scaling with power curve (exp 2.5) for
  smoother VR controls - less sensitive at low deflections, full
  power at 90% stick travel
- Fix Missing Refresh Token error by clearing stale auth state
  automatically instead of leaving users in broken state
- Fix build errors: use ScoreEvent type in weaponSystem, remove
  unused parTime parameter from buildResult

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

src/services/authService.ts

@@ -156,6 +156,20 @@ export class AuthService {
             return await this._client.getTokenSilently();
         } catch (error) {
             log.error('Error getting access token:', error);
+
+            // If refresh token is missing/invalid, clear stale auth state
+            // User will appear logged out and can log in fresh
+            if (error instanceof Error && error.message.includes('Missing Refresh Token')) {
+                log.warn('[AuthService] Clearing stale auth session');
+                this._user = null;
+                // Clear Auth0 local storage cache without redirecting
+                try {
+                    await this._client.logout({ openUrl: false });
+                } catch {
+                    // Ignore logout errors - just clear local state
+                }
+            }
+
             return undefined;
         }
     }

src/services/gameResultsService.ts

@@ -144,8 +144,7 @@ export class GameResultsService {
         levelName: string,
         gameStats: GameStats,
         totalAsteroids: number,
-        endReason: 'victory' | 'death' | 'stranded',
+        endReason: 'victory' | 'death' | 'stranded'
-        parTime: number
     ): GameResult {
         // Get player name from auth service
         const authService = AuthService.getInstance();

src/ship/ship.ts

@@ -609,14 +609,20 @@ export class Ship {
             rightStick: Vector2.Zero(),
         };
 
-        // Merge inputs with smooth deadzone scaling (controller takes priority if active, keyboard disabled in VR)
+        // Merge inputs with non-linear curve (controller takes priority if active, keyboard disabled in VR)
-        // Deadzone: 0.1-0.15 range with linear scaling (avoids abrupt cliff effect)
+        // Deadzone: 0.1, Max input: 0.9, Power curve for slow start, fast finish
+        const DEADZONE = 0.1;
+        const MAX_INPUT = 0.9;
+        const CURVE_EXPONENT = 2.5;
+
         const leftMagnitude = controllerState.leftStick.length();
         const rightMagnitude = controllerState.rightStick.length();
 
-        // Scale factor: 0% at 0.1, 100% at 0.15, linear interpolation between
+        // Calculate curved scale: slow at low deflection, ramps up toward max at 0.9
-        const leftScale = Math.max(0, Math.min(1, (leftMagnitude - 0.1) / 0.05));
+        const leftScale = leftMagnitude <= DEADZONE ? 0 :
-        const rightScale = Math.max(0, Math.min(1, (rightMagnitude - 0.1) / 0.05));
+            Math.pow(Math.min(1, (leftMagnitude - DEADZONE) / (MAX_INPUT - DEADZONE)), CURVE_EXPONENT);
+        const rightScale = rightMagnitude <= DEADZONE ? 0 :
+            Math.pow(Math.min(1, (rightMagnitude - DEADZONE) / (MAX_INPUT - DEADZONE)), CURVE_EXPONENT);
 
         const combinedInput = {
             leftStick:

src/ship/weaponSystem.ts

@@ -20,6 +20,7 @@ import { GameStats } from "../game/gameStats";
 import { Projectile } from "./projectile";
 import { RockFactory } from "../environment/asteroids/rockFactory";
 import log from "../core/logger";
+import { ScoreEvent } from "../ui/hud/scoreboard";
 
 /**
  * Handles weapon firing and projectile lifecycle using shape casting
@@ -39,7 +40,7 @@ export class WeaponSystem {
     private _havokPlugin: HavokPlugin | null = null;
 
     // Observable for score updates when asteroids are destroyed
-    private _scoreObservable: Observable<{score: number, remaining: number, message: string}> | null = null;
+    private _scoreObservable: Observable<ScoreEvent> | null = null;
 
     // Ship body to ignore in shape casts
     private _shipBody: PhysicsBody | null = null;

src/ui/hud/statusScreen.ts

@@ -671,8 +671,7 @@ export class StatusScreen {
                 this._currentLevelName,
                 this._gameStats,
                 this._totalAsteroids,
-                endReason,
+                endReason
-                this._parTime
             );
 
             log.info('[StatusScreen] Built result:', result);