Add Calibrate AI Control UI and fleet LLM backend wiring.

Operators toggle Logic gates vs AI Control on Settings, refresh local Ollama models, and save ai_endpoint settings via Calibrate PUT; server scheduler and agent snapshot/command paths support stateless 60s fleet decisions.

server/internal/api/fleet_ai_handler.go

@@ -0,0 +1,90 @@
+package api
+
+import (
+	"encoding/json"
+	"net/http"
+	"strconv"
+	"strings"
+
+	fleetai "crypto-miner-server/internal/ai"
+	"crypto-miner-server/internal/db"
+)
+
+// FleetAIHandler serves Fleet AI Control API routes.
+type FleetAIHandler struct {
+	config FleetAIConfigSource
+	db     interface {
+		ListAIDecisions(agentID string, limit int) ([]db.AIDecisionRecord, error)
+	}
+}
+
+func NewFleetAIHandler(cfg FleetAIConfigSource, database interface {
+	ListAIDecisions(agentID string, limit int) ([]db.AIDecisionRecord, error)
+}) *FleetAIHandler {
+	return &FleetAIHandler{config: cfg, db: database}
+}
+
+func (h *FleetAIHandler) GetConfig(w http.ResponseWriter, r *http.Request) {
+	if h.config == nil {
+		http.Error(w, "config unavailable", http.StatusServiceUnavailable)
+		return
+	}
+	writeJSON(w, h.config.GetFleetAIConfig())
+}
+
+func (h *FleetAIHandler) PutConfig(w http.ResponseWriter, r *http.Request) {
+	if h.config == nil {
+		http.Error(w, "config unavailable", http.StatusServiceUnavailable)
+		return
+	}
+	var body FleetAIConfigView
+	if err := json.NewDecoder(r.Body).Decode(&body); err != nil {
+		http.Error(w, "invalid JSON", http.StatusBadRequest)
+		return
+	}
+	if body.AIDecisionIntervalSec < 0 {
+		http.Error(w, "ai_decision_interval_sec must be ≥ 0", http.StatusBadRequest)
+		return
+	}
+	if err := h.config.UpdateFleetAIConfig(body); err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+	writeJSON(w, h.config.GetFleetAIConfig())
+}
+
+func (h *FleetAIHandler) GetModels(w http.ResponseWriter, r *http.Request) {
+	endpoint := strings.TrimSpace(r.URL.Query().Get("endpoint"))
+	if endpoint == "" && h.config != nil {
+		endpoint = h.config.GetFleetAIConfig().AIEndpoint
+	}
+	models, err := fleetai.ListModels(r.Context(), endpoint)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusBadGateway)
+		return
+	}
+	writeJSON(w, map[string]interface{}{"models": models, "endpoint": endpoint})
+}
+
+func (h *FleetAIHandler) GetDecisions(w http.ResponseWriter, r *http.Request) {
+	if h.db == nil {
+		writeJSON(w, []db.AIDecisionRecord{})
+		return
+	}
+	agentID := strings.TrimSpace(r.URL.Query().Get("agent_id"))
+	limit := 50
+	if raw := r.URL.Query().Get("limit"); raw != "" {
+		if n, err := strconv.Atoi(raw); err == nil && n > 0 {
+			limit = n
+		}
+	}
+	rows, err := h.db.ListAIDecisions(agentID, limit)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+	if rows == nil {
+		rows = []db.AIDecisionRecord{}
+	}
+	writeJSON(w, rows)
+}