fix(ci): improve Chromatic workflow — path filter, auto-accept on main

Three fixes:

1. Run on push to main — establishes baselines when PRs merge.
   Without this, Chromatic has no main baseline and every PR shows
   all stories as "new changes".

2. autoAcceptChanges on main — automatically accepts all changes
   as the new baseline when merging to main. No manual review needed
   for the source of truth branch.

3. Narrow path filter — only trigger on component, style, theme,
   storybook, and documentation changes. E2E tests, configs, and
   other non-UI files no longer trigger Chromatic.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: talissoncosta

.github/workflows/frontend-chromatic.yml

@@ -1,10 +1,23 @@
 name: Frontend Chromatic
 
 on:
+  push:
+    branches: [main]
+    paths:
+      - frontend/web/components/**
+      - frontend/web/styles/**
+      - frontend/common/theme/**
+      - frontend/documentation/**
+      - frontend/.storybook/**
+      - .github/workflows/frontend-chromatic.yml
   pull_request:
     types: [opened, synchronize, reopened, ready_for_review]
     paths:
-      - frontend/**
+      - frontend/web/components/**
+      - frontend/web/styles/**
+      - frontend/common/theme/**
+      - frontend/documentation/**
+      - frontend/.storybook/**
       - .github/workflows/frontend-chromatic.yml
 
 permissions:
@@ -14,7 +27,7 @@ jobs:
   chromatic:
     name: Chromatic
     runs-on: ubuntu-latest
-    if: github.event.pull_request.draft == false
+    if: github.event_name == 'push' || github.event.pull_request.draft == false
 
     defaults:
       run:
@@ -43,3 +56,4 @@ jobs:
           exitZeroOnChanges: true
           exitOnceUploaded: true
           onlyChanged: true
+          autoAcceptChanges: main