Fix: D0 seed above threshold, faster hospital drain, containment as primary metric

server/environment.py

@@ -260,7 +260,7 @@ class EpidemicContainmentEnv(Environment):
             if district.true_infection_rate > INFECTION_THRESHOLD:
                 # Capacity drains proportional to how far above threshold
                 excess   = district.true_infection_rate - INFECTION_THRESHOLD
-                drain    = round(excess * 0.15, 4)
+                drain = round(excess * 0.25, 4)
                 district.hospital_capacity_remaining = max(
                     0.0,
                     district.hospital_capacity_remaining - drain

server/grader.py

@@ -106,8 +106,8 @@ def grade_trajectory(trajectory: List[TrajectoryStep], task_name: str) -> GradeR
     # Efficiency (15%) — quality of resource allocation decisions.
     # Speed (10%) — tiebreaker rewarding proactive early containment.
     final_score = round(min(1.0, max(0.0,
-        containment_score * 0.30 +
-        hospital_score    * 0.45 +
+        containment_score * 0.45 +
+        hospital_score    * 0.30 +
         efficiency_score  * 0.15 +
         speed_score       * 0.10
     )), 4)

server/tasks/task_easy.py

@@ -22,7 +22,7 @@ class EasyTask(BaseTask):
         # With TREATMENT_REDUCTION=0.05 and good strategy, agent contains both
         # districts in 6-8 steps, earning a speed bonus. Requires sustained focus
         # on D0 first before D1 grows above safe threshold.
-        seed_infections = [0.40, 0.04]
+        seed_infections = [0.50, 0.06]
 
         return CityState(
             day                 = 0,