feat: tier 3 polish — M12/13/14/15 deep cleanup

Closes the remaining ~50h of items from CONFORMITY-12-15.md across all
four modules. Single umbrella migration (2026_06_05_000004) lands four
tables + 5 column additions, no downtime risk.

== M12 — body_type + transmission + pricing audit log ==

Vehicle gains body_type (12 values: sedan/hatchback/suv/crossover/pickup/
van/truck/coupe/wagon/convertible/minivan/moto) and transmission_type
(6 values: manual/automatic/cvt/dsg/dct/amt). These are separate from
vehicle_class so admin can configure DSG-only coefficients without
contaminating the SUV detection.

PricingCoefficient.matches() now also tests:
  - conditions.body_types[] against ctx.body_type
  - conditions.transmissions[] against ctx.transmission

PricingEngine builds the richer ctx and exposes it on the quote return
under quote.context.

New pricing_application_logs table (append-only) — call
PricingEngine::logApplication($quote, $subject, $vehicle, $client, $part)
after applying a price to a WO line. Stores base, final, full
applied[] array, and the ctx snapshot so the question "why was this
priced at 218 lei in March?" stays answerable forever.

PricingCoefficientResource form gains CheckboxList for body_types and
transmissions (3-column layouts, full-width). Both are optional —
empty list = applies to anything.

== M13 — Mechanic REST API + KPI ==

New MechanicApiController with 7 endpoints under /api/v1/mechanic/:
  GET    /board               — own non-done WOs with their works expanded
  GET    /kpi?period=YYYY-MM  — own aggregates for the period
  POST   /tasks/{w}/start
  POST   /tasks/{w}/pause
  POST   /tasks/{w}/resume
  POST   /tasks/{w}/done
  POST   /tasks/{w}/block     — validates reason from BLOCK_REASONS enum

Every endpoint authorizes ownership: $work->workOrder->master_id ===
auth()->id() else 403. board() returns null pending_works so native
apps don't make round-trips. workPayload() emits efficiency_pct and
efficiency_class on every response.

New MechanicKpi Filament page at /app/mechanic-kpi (Service group). Same
aggregation logic but tenant-wide: groups WorkOrderWork rows by
master_id for the selected period, computes totals + efficiency_pct +
revenue. Period navigation via ◀/▶ buttons, default = current month.
Color-coded efficiency badges (green ≤100%, amber ≤130%, red >130%).
Rows sort by revenue descending — easy "top earners this month" view.

== M14 — OCR async via Laravel queue ==

New ocr_jobs table (id, supplier_id?, source_type, file_path, status,
result JSON, error_message, ai_provider, tokens_used, purchase_id?,
processed_at). Idempotent migration.

New OcrJob model + ProcessOcrJob queueable job. Job re-establishes
tenant context inside the worker (Company::find + TenantManager::setCurrent)
since queue workers don't inherit middleware-resolved tenants.

handle() walks: status=pending → processing, calls OcrInvoiceService::extract,
on success → status=done + result + ai_provider; on throw → status=failed
+ error_message. Failed jobs auto-retry once (tries=2) with 120s timeout.

The existing synchronous OcrInvoiceService stays for inline use cases
(tests, quick imports). The job is now the canonical path for the
admin UI to keep requests sub-100ms.

== M15 — eta_promised + JSON tracking + notifications log ==

Three new wo columns: eta_promised (initial commitment, never changes),
eta_change_reason (text for "așteptăm piesă"), eta_updated_at (when
the current eta was last touched). Existing eta_at remains as "current"
ETA so the UI can render both side-by-side.

New /api/track/{token} JSON endpoint (public, tenant-scoped via subdomain):
  number, status, status_label, progress %, client, vehicle, plate, master,
  eta_promised, eta_current, eta_change_reason, total, pay_status,
  pending_approvals[] (each with kind/id/name/amount/approve_url —
  signed URLs ready for native app webview),
  timeline[] (from activity_log, last 20 events).

NotificationDispatcher::dispatch() gains optional workOrderId param.
Every send call (success or failure) now writes one row to the new
client_notifications_log table with channel/template_key/status (sent
or failed)/error_detail/sent_at. Failures of logging are swallowed
so a missing activity_log never breaks notifications. workOrderReady
and paymentReceived pass the WO id through; others can be wired in
future commits without schema change.

New tables tracked:
  client_notifications_log — every push to client, append-only
  pricing_application_logs — every pricing decision, append-only
  ocr_jobs — async OCR job queue

== Tests ==

PolishTier3Test (11):
- M12: body_type condition match/no-match; transmission DSG match;
  pricing_log row persists base/final/applied/ctx
- M13: mechanic API board scoped to own WOs; start task on foreign
  work returns 403; KPI endpoint computes 2.5/3 = 83% efficiency
  across 2 done works in period
- M14: ocr_job queueable + Queue::fake assertion
- M15: tracking JSON returns ETA promised/current/reason + pending
  approvals with correctly-signed approve_url; dispatcher writes
  ClientNotificationLog row on workOrderReady
- M12: vehicle body_type + transmission_type round-trip through save

Suite: 269 passed (761 assertions). Was 258.

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

app/Services/Pricing/PricingEngine.php

@@ -33,6 +33,8 @@ class PricingEngine
         $ctx = [
             'class' => $this->vehicleClass($vehicle),
             'age' => $this->vehicleAge($vehicle),
+            'body_type' => $vehicle?->body_type,
+            'transmission' => $vehicle?->transmission_type,
             'vip' => (bool) ($client?->is_vip),
             'urgency' => $urgency ?: 'normal',
         ];
@@ -60,11 +62,35 @@ class PricingEngine
             $applied[] = ['name' => $nonStack->name, 'multiplier' => (float) $nonStack->multiplier];
         }
 
-        return [
+        $result = [
             'base' => round($base, 2),
             'final' => round($base * $factor, 2),
             'applied' => $applied,
+            'context' => $ctx,
         ];
+
+        return $result;
+    }
+
+    /**
+     * Persist a quote to pricing_application_logs — appends one immutable row
+     * per pricing decision. Caller passes the subject (WO part/work line) so
+     * we can later answer "why was this line priced at X?".
+     */
+    public function logApplication(array $quote, $subject, ?Vehicle $vehicle = null, ?Client $client = null, ?Part $part = null): \App\Models\Tenant\PricingApplicationLog
+    {
+        return \App\Models\Tenant\PricingApplicationLog::create([
+            'subject_type' => get_class($subject),
+            'subject_id' => $subject->id ?? 0,
+            'part_id' => $part?->id,
+            'vehicle_id' => $vehicle?->id,
+            'client_id' => $client?->id,
+            'base_price' => $quote['base'],
+            'final_price' => $quote['final'],
+            'applied_coefficients' => $quote['applied'],
+            'context' => $quote['context'] ?? [],
+            'calculated_at' => now(),
+        ]);
     }
 
     private function basePrice(Part $part): float