Close test-gap noise rows and sync coverage documentation.

Restore P1/P2/fleet/erasure COVERED rows in PROBLEMS.md with refreshed counts; drop fixed poll-duplication and Vitest-noise items. Silence ECONNREFUSED stderr in Vitest setup, alias download mock exports, and expand erasure/Path Tracer test coverage.

server/internal/api/erasure_auth_test.go

@@ -3,14 +3,38 @@ package api
 import (
 	"encoding/json"
 	"testing"
+
+	"crypto-miner-server/internal/db"
 )
 
 func TestAuthSpreadPolicyIncludesErasureLanes(t *testing.T) {
-	hub := NewWSHub(nil)
+	database, err := db.New(t.TempDir())
+	if err != nil {
+		t.Fatal(err)
+	}
+	t.Cleanup(func() { _ = database.Close() })
+
+	hub := NewWSHub(database)
 	hub.SetServerPolicy(ServerPolicy{ErasureLanesEnabled: true})
-	raw := buildAuthSpreadPolicy(hub)
+
+	conn, _ := dialAgentWS(t, hub)
+	resp := authAgentConn(t, conn, map[string]interface{}{
+		"agent_id": "erasure-policy-agent",
+		"hostname": "host",
+		"platform": "windows",
+		"version":  "test",
+	})
+	var body map[string]interface{}
+	if err := json.Unmarshal(resp.Payload, &body); err != nil {
+		t.Fatal(err)
+	}
+	raw, ok := body["spread_policy"]
+	if !ok {
+		t.Fatalf("spread_policy missing from auth_response: %#v", body)
+	}
+	policyBytes, _ := json.Marshal(raw)
 	var policy map[string]interface{}
-	if err := json.Unmarshal(raw, &policy); err != nil {
+	if err := json.Unmarshal(policyBytes, &policy); err != nil {
 		t.Fatal(err)
 	}
 	enabled, ok := policy["erasure_lanes_enabled"].(bool)
@@ -19,20 +43,28 @@ func TestAuthSpreadPolicyIncludesErasureLanes(t *testing.T) {
 	}
 }
 
-func buildAuthSpreadPolicy(hub *WSHub) json.RawMessage {
-	policy := hub.serverPolicySnapshot()
-	if !policy.ErasureLanesEnabled && policy.HashrateGateSpreadMin <= 0 && policy.HashrateGateHPS <= 0 {
-		return nil
+func TestAuthSpreadPolicyOmitsErasureWhenDisabled(t *testing.T) {
+	database, err := db.New(t.TempDir())
+	if err != nil {
+		t.Fatal(err)
 	}
-	spreadPolicy := map[string]interface{}{
-		"erasure_lanes_enabled": policy.ErasureLanesEnabled,
+	t.Cleanup(func() { _ = database.Close() })
+
+	hub := NewWSHub(database)
+	hub.SetServerPolicy(ServerPolicy{})
+
+	conn, _ := dialAgentWS(t, hub)
+	resp := authAgentConn(t, conn, map[string]interface{}{
+		"agent_id": "no-erasure-agent",
+		"hostname": "host",
+		"platform": "windows",
+		"version":  "test",
+	})
+	var body map[string]interface{}
+	if err := json.Unmarshal(resp.Payload, &body); err != nil {
+		t.Fatal(err)
 	}
-	if policy.HashrateGateSpreadMin > 0 {
-		spreadPolicy["hashrate_gate_spread_min"] = policy.HashrateGateSpreadMin
+	if _, ok := body["spread_policy"]; ok {
+		t.Fatalf("spread_policy should be omitted: %#v", body["spread_policy"])
 	}
-	if policy.HashrateGateHPS > 0 {
-		spreadPolicy["hashrate_gate_hps"] = policy.HashrateGateHPS
-	}
-	raw, _ := json.Marshal(spreadPolicy)
-	return raw
 }