feat: expand companion platform, device controls, and memoir workflows

Add customer and operator login, BLE provisioning, device fleet controls, call memory, memoir generation, and refreshed family and maintenance portals. Include API contracts, migrations, firmware sources, tests, assets, and deployment documentation.

internal/httpapi/event_history.go

@@ -0,0 +1,23 @@
+package httpapi
+
+import (
+	"data-terminal-cloud/internal/webevents"
+	"net/http"
+	"time"
+)
+
+func WebEventHistoryHandler(service *webevents.Service) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		principal, ok := webPrincipal(w, r)
+		if !ok {
+			return
+		}
+		items, err := service.History(r.Context(), principal, time.Now().Add(-7*24*time.Hour), 200)
+		if err != nil {
+			WriteError(w, r, http.StatusInternalServerError, "INTERNAL_ERROR", "近期动态读取失败，请重试")
+			return
+		}
+		w.Header().Set("Cache-Control", "no-store")
+		WriteJSON(w, r, http.StatusOK, map[string]any{"items": items, "limit": 200, "retention_days": 7})
+	})
+}