Complete private Monero miner control stack.

Implement Windows agent with RandomX mining and WebSocket fleet reporting, wire dashboard settings into the builder with saved exe paths, and add project README.

agent/client/protocol.go

@@ -0,0 +1,63 @@
+package client
+
+import "encoding/json"
+
+type Message struct {
+	Type    string          `json:"type"`
+	Payload json.RawMessage `json:"payload"`
+}
+
+type AuthPayload struct {
+	AgentID  string `json:"agent_id"`
+	Wallet   string `json:"wallet"`
+	Version  string `json:"version"`
+	Hostname string `json:"hostname"`
+	CPUCores int    `json:"cpu_cores"`
+	MemoryGB int    `json:"memory_gb"`
+	Worker   string `json:"worker_name"`
+}
+
+type AuthResponse struct {
+	Success bool   `json:"success"`
+	AgentID string `json:"agent_id"`
+	Error   string `json:"error"`
+	Config  struct {
+		Threads  int `json:"threads"`
+		Priority int `json:"priority"`
+	} `json:"config"`
+}
+
+type Job struct {
+	ID            string `json:"job_id"`
+	Height        int64  `json:"height"`
+	BlockTemplate string `json:"blocktemplate"`
+	Difficulty    int64  `json:"difficulty"`
+	SeedHash      string `json:"seed_hash"`
+	Target        string `json:"target"`
+	Blob          string `json:"blob"`
+	Algo          string `json:"algo"`
+}
+
+type SharePayload struct {
+	JobID  string `json:"job_id"`
+	Nonce  string `json:"nonce"`
+	Hash   string `json:"hash"`
+	Worker string `json:"worker_name"`
+}
+
+type StatsPayload struct {
+	Hashrate15s     float64 `json:"hashrate_15s"`
+	Hashrate1m      float64 `json:"hashrate_1m"`
+	Hashrate15m     float64 `json:"hashrate_15m"`
+	SharesSubmitted int     `json:"shares_submitted"`
+	SharesAccepted  int     `json:"shares_accepted"`
+	CPUUsagePct     float64 `json:"cpu_usage_pct"`
+	MemoryUsagePct  float64 `json:"memory_usage_pct"`
+	UptimeSeconds   int     `json:"uptime_seconds"`
+}
+
+type ShareResult struct {
+	JobID    string `json:"job_id"`
+	Accepted bool   `json:"accepted"`
+	Error    string `json:"error"`
+}