feat(office): users admin UI, table rendering, and user save fixes

Add Users list/detail with ACL toggles and library people update/status APIs.
Fix project table layout and ANSI-safe cell rendering, and decode array
responses from people/status so saves no longer fail on JSON unmarshal.

Co-authored-by: Cursor <cursoragent@cursor.com>

cmd/office/model/formfields_task_test.go

@@ -0,0 +1,42 @@
+package model
+
+import "testing"
+
+func TestTaskStatusLifecycleCycle(t *testing.T) {
+	cur := TaskLifecycleOpen
+	cur = cur.Next()
+	if cur != TaskLifecycleClosed {
+		t.Fatalf("got %v", cur)
+	}
+	cur = cur.Prev()
+	if cur != TaskLifecycleOpen {
+		t.Fatalf("got %v", cur)
+	}
+}
+
+func TestFormFieldsFromRawTask(t *testing.T) {
+	raw := map[string]any{
+		"title":       "Fix",
+		"description": "Details",
+		"status":      1,
+		"projectOwner": map[string]any{"title": "Alpha"},
+		"startDate":   "2026-06-01T10:00:00Z",
+		"deadline":    "2026-06-10T18:00:00Z",
+		"responsibles": []any{
+			map[string]any{"id": "u1", "displayName": "Alice"},
+		},
+	}
+	f := FormFieldsFromRaw(KindTask, raw)
+	if !f.HasTaskStatus || f.TaskStatus != TaskLifecycleOpen {
+		t.Fatalf("status: %+v", f)
+	}
+	if !f.HasResponsible || f.ResponsibleID != "u1" {
+		t.Fatalf("responsible: %+v", f)
+	}
+	if f.ProjectTitle != "Alpha" {
+		t.Fatalf("project: %q", f.ProjectTitle)
+	}
+	if f.TimingSummary == "" {
+		t.Fatal("expected timing summary")
+	}
+}