fix(ui): no raw JSON on Training list, pain no longer [object Object], add Chat button on GroupEdit, drop facebook/line from persona

- list_groups returns lightweight summaries (id/title/status/persona_count + product) —
  never the full personas array, so Training no longer shows a long JSON blob.
- PersonaForm toLines extracts .description/.text from pain/objection objects (fixes
  '[object Object]'); save re-wraps pains as {description}.
- GroupEdit persona cards get a 'แชท' (MessageSquare) button so you can start chatting
  right where you land after creating (chat was only on Personas page before).
- channel: default neutral 'social', removed facebook/line validation + removed from
  revealable_view (scenario now sets the tone, not fb/line).
All 9 backend suites pass. Rebuilt dist.

frontend/dist/assets/sparkles-x6AFhIMl.js

@@ -0,0 +1,6 @@
+import{c as a}from"./index-Dyfiqyex.js";/**
+ * @license lucide-vue-next v1.0.0 - ISC
+ *
+ * This source code is licensed under the ISC license.
+ * See the LICENSE file in the root directory of this source tree.
+ */const l=a("sparkles",[["path",{d:"M11.017 2.814a1 1 0 0 1 1.966 0l1.051 5.558a2 2 0 0 0 1.594 1.594l5.558 1.051a1 1 0 0 1 0 1.966l-5.558 1.051a2 2 0 0 0-1.594 1.594l-1.051 5.558a1 1 0 0 1-1.966 0l-1.051-5.558a2 2 0 0 0-1.594-1.594l-5.558-1.051a1 1 0 0 1 0-1.966l5.558-1.051a2 2 0 0 0 1.594-1.594z",key:"1s2grr"}],["path",{d:"M20 2v4",key:"1rf3ol"}],["path",{d:"M22 4h-4",key:"gwowj6"}],["circle",{cx:"4",cy:"20",r:"2",key:"6kqj1y"}]]);export{l as S};