Ship Assistent 0.12.1: training tab, dataset pipeline, and heard RAG.

Restructure UI with app-level tabs and chat history drawer; add dataset curation,
HF import, Modelfile/QLoRA hooks, and link approved samples to the agent immediately
via heard vector memory without waiting for fine-tuning.

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

src/main.js

@@ -17,3 +17,6 @@ window.SA.applyConfigPatchKeys = function (config) {
 };
 
 import './app.js';
+import { attachTraining } from './training.js';
+
+attachTraining(window.SA);