fix(hints): position "?" next to page title, fix Admin pages missing

Switched render hook from PAGE_HEADER_ACTIONS_BEFORE to
PAGE_HEADER_HEADING_AFTER:
- Previous hook lived inside the action buttons container which is
  skipped on pages without header actions (most Admin pages: Settings,
  Integrations, API Tokens, Backup, Activity log).
- Previous hook also pushed the icon to the right side on pages that
  did have actions (Clienți, Mașini, Calendar list), which looked
  disconnected from the title.

New hook renders "?" immediately after the page heading text on every
page, always visible. Also fixed one URL prefix mismatch:
app/pipeline → app/pipeline-board (actual Filament page slug).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

app/Support/Hints.php

@@ -743,7 +743,7 @@ class Hints
             'app/vehicles' => 'crm.vehicles.overview',
             'app/leads' => 'crm.leads.overview',
             'app/deals' => 'crm.pipeline.overview',
-            'app/pipeline' => 'crm.pipeline.overview',
+            'app/pipeline-board' => 'crm.pipeline.overview',
             'app/calendar-board' => 'crm.calendar.overview',
             'app/appointments' => 'crm.calendar.overview',
             'app/calls' => 'crm.calls.overview',