Add fleet ops dashboard, Calibrate enforcement, and dead-code cleanup.

Ship live alerts, pool status, AI monitor, remote agent commands, build manager, and uninstall flow; wire Calibrate settings (WS ping, pool traffic log, retention limits) at runtime and exclude server/data from git.

server/internal/db/retention.go

@@ -0,0 +1,41 @@
+package db
+
+import (
+	"time"
+
+	"crypto-miner-server/internal/models"
+)
+
+// PurgeHashrateSamplesBefore deletes samples older than cutoff.
+func (d *Database) PurgeHashrateSamplesBefore(cutoff time.Time) (int64, error) {
+	res, err := d.Exec("DELETE FROM hashrate_samples WHERE timestamp < ?", cutoff)
+	if err != nil {
+		return 0, err
+	}
+	return res.RowsAffected()
+}
+
+// ListBuildsOlderThan returns build records created before cutoff.
+func (d *Database) ListBuildsOlderThan(cutoff time.Time) ([]*models.BuildRecord, error) {
+	rows, err := d.Query(`SELECT id, worker_name, server_url, wallet, threads, file_size, file_path, created_at, pool_host, pool_port, pool_tls, pool_pass FROM builds WHERE created_at < ?`, cutoff)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	var out []*models.BuildRecord
+	for rows.Next() {
+		b := &models.BuildRecord{}
+		if err := rows.Scan(&b.ID, &b.WorkerName, &b.ServerURL, &b.Wallet, &b.Threads, &b.FileSize, &b.FilePath, &b.CreatedAt,
+			&b.PoolHost, &b.PoolPort, &b.PoolTLS, &b.PoolPass); err != nil {
+			return nil, err
+		}
+		out = append(out, b)
+	}
+	return out, nil
+}
+
+// DeleteBuild removes a build record by id.
+func (d *Database) DeleteBuild(id string) error {
+	_, err := d.Exec("DELETE FROM builds WHERE id = ?", id)
+	return err
+}

server/internal/db/retention_test.go

@@ -0,0 +1,33 @@
+package db
+
+import (
+	"testing"
+	"time"
+)
+
+func TestPurgeHashrateSamplesBefore(t *testing.T) {
+	d, err := New(t.TempDir())
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer d.Close()
+
+	_, err = d.Exec("INSERT INTO hashrate_samples (agent_id, hashrate, timestamp) VALUES ('a1', 100, ?)",
+		time.Now().Add(-48*time.Hour))
+	if err != nil {
+		t.Fatal(err)
+	}
+	_, err = d.Exec("INSERT INTO hashrate_samples (agent_id, hashrate, timestamp) VALUES ('a1', 200, ?)",
+		time.Now())
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	n, err := d.PurgeHashrateSamplesBefore(time.Now().Add(-24 * time.Hour))
+	if err != nil {
+		t.Fatal(err)
+	}
+	if n != 1 {
+		t.Fatalf("expected 1 purged, got %d", n)
+	}
+}

server/internal/db/sqlite.go

@@ -7,8 +7,8 @@ import (
 	"path/filepath"
 	"time"
 
-	_ "modernc.org/sqlite"
 	"crypto-miner-server/internal/models"
+	_ "modernc.org/sqlite"
 )
 
 type Database struct {
@@ -190,9 +190,18 @@ func (d *Database) ListAgents() ([]*models.Agent, error) {
 
 // Share operations
 
-func (d *Database) InsertShare(s *models.Share) error {
+func (d *Database) InsertShare(s *models.Share) (int64, error) {
 	query := `INSERT INTO shares (agent_id, job_id, difficulty, accepted, hash, nonce, error, timestamp) VALUES (?, ?, ?, ?, ?, ?, ?, ?)`
-	_, err := d.Exec(query, s.AgentID, s.JobID, s.Difficulty, boolToInt(s.Accepted), s.Hash, s.Nonce, s.Error, s.Timestamp)
+	res, err := d.Exec(query, s.AgentID, s.JobID, s.Difficulty, boolToInt(s.Accepted), s.Hash, s.Nonce, s.Error, s.Timestamp)
+	if err != nil {
+		return 0, err
+	}
+	return res.LastInsertId()
+}
+
+func (d *Database) UpdateShareResult(id int64, accepted bool, errMsg string) error {
+	query := `UPDATE shares SET accepted = ?, error = ? WHERE id = ?`
+	_, err := d.Exec(query, boolToInt(accepted), errMsg, id)
 	return err
 }
 
@@ -285,13 +294,13 @@ func (d *Database) ListBuilds(limit int) ([]*models.BuildRecord, error) {
 // Stats
 
 type FleetStats struct {
-	TotalAgents      int     `json:"total_agents"`
-	OnlineAgents     int     `json:"online_agents"`
-	TotalHashrate    float64 `json:"total_hashrate"`
-	TotalShares      int     `json:"total_shares"`
-	AcceptedShares   int     `json:"accepted_shares"`
-	RejectedShares   int     `json:"rejected_shares"`
-	AcceptRate       float64 `json:"accept_rate"`
+	TotalAgents    int     `json:"total_agents"`
+	OnlineAgents   int     `json:"online_agents"`
+	TotalHashrate  float64 `json:"total_hashrate"`
+	TotalShares    int     `json:"total_shares"`
+	AcceptedShares int     `json:"accepted_shares"`
+	RejectedShares int     `json:"rejected_shares"`
+	AcceptRate     float64 `json:"accept_rate"`
 }
 
 func (d *Database) GetFleetStats() (*FleetStats, error) {