feat(studio): generic Today stories + auto-hide after 3 modules + brand chips out + editor 0.13.0

Two visible UX shifts:

1. Store Today carousel.
   - Three hardcoded stories rewritten to be generic:
     'Modules are the building blocks',
     'Flows chain modules deterministically',
     'Bring your own sources' — no DeepWiki / Semgrep /
     text.extract / extract-summarize.yaml mentions. The
     concrete brand suggestions live in Settings → MCP
     Clients where the operator goes deliberately.
   - +DeepWiki / +Semgrep quick-add chips removed from
     the hero footer. They felt like ads on every page
     load. The standalone Suggested Sources strip below
     still picks them up, but the editorial hero stays
     clean.
   - Auto-hide the entire carousel once installedCount
     ≥ 3 — the operator has demonstrably been here
     before; the welcome strip stops earning its scroll
     cost.

2. Editor bump to 0.13.0:
   - Edge selection (click a wire to select it)
   - Properties panel edge-info mode with type-compat
     indicator + Disconnect button
   - Canvas-wide background tap closes the panel (works
     even when zoomed out so the grid doesn't fill the
     viewport)

Signed-off-by: flemming-it <stefan.a.flemming@googlemail.com>

pubspec.yaml

@@ -1,7 +1,7 @@
 name: fai_studio
 description: "F∆I Studio — desktop GUI for the F∆I hub"
 publish_to: 'none'
-version: 0.59.0
+version: 0.60.0
 
 environment:
   sdk: ^3.11.0-200.1.beta