ui: F1 — populate OpenAlerts in baseView so nav badge updates everywhere

Flagged in review of cd38b40: the Alerts tab badge should show the
open count from any page, not just /alerts. baseView now takes the
request and queries store.ListAlerts(Status: "open") to fill
view.OpenAlerts on every page render. All call sites updated.

internal/server/http/ui_schedules.go

@@ -112,7 +112,7 @@ func (s *Server) handleUISchedulesList(w stdhttp.ResponseWriter, r *stdhttp.Requ
 	chrome.ScheduleCount = len(scheds)
 	chrome.SourceGroupCount = len(groups)
 
-	view := s.baseView(u)
+	view := s.baseView(r, u)
 	view.Title = host.Name + " schedules · restic-manager"
 	view.Page = hostSchedulesPage{
 		hostChromeData: chrome,
@@ -140,7 +140,7 @@ func (s *Server) handleUIScheduleNewGet(w stdhttp.ResponseWriter, r *stdhttp.Req
 		stdhttp.Error(w, "internal", stdhttp.StatusInternalServerError)
 		return
 	}
-	view := s.baseView(u)
+	view := s.baseView(r, u)
 	view.Title = "New schedule · " + host.Name + " · restic-manager"
 	view.Page = scheduleEditPage{
 		hostChromeData:   s.loadHostChrome(r, *host, "schedules", "new schedule"),
@@ -186,7 +186,7 @@ func (s *Server) handleUIScheduleEditGet(w stdhttp.ResponseWriter, r *stdhttp.Re
 	for _, gid := range sc.SourceGroupIDs {
 		selected[gid] = true
 	}
-	view := s.baseView(u)
+	view := s.baseView(r, u)
 	view.Title = "Edit schedule · " + host.Name + " · restic-manager"
 	view.Page = scheduleEditPage{
 		hostChromeData: s.loadHostChrome(r, *host, "schedules", "edit schedule"),
@@ -415,7 +415,7 @@ func (s *Server) renderScheduleFormError(w stdhttp.ResponseWriter, r *stdhttp.Re
 		saveAction = "/hosts/" + host.ID + "/schedules/" + sid + "/edit"
 		crumb = "edit schedule"
 	}
-	view := s.baseView(u)
+	view := s.baseView(r, u)
 	view.Title = "Schedule · " + host.Name + " · restic-manager"
 	view.Page = scheduleEditPage{
 		hostChromeData:   s.loadHostChrome(r, *host, "schedules", crumb),