Fix 500 on recipe save and surface errors as notifications

- Fix root cause: recipes_spices.amount_in_percent was decimal(4,2) which
  overflows on 100% — widened to decimal(6,2) via migration
- Wrap afterSave() in try-catch so DB/logic errors show as a persistent
  danger notification instead of a blank 500 page
- Same for CreateProduct: errors show as notification; also reads
  recipe_spices from raw Livewire $this->data (not $data param which
  excludes dehydrated(false) fields) so recipes actually save on create

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

database/migrations/2026_09_12_200000_fix_amount_in_percent_precision.php

@@ -0,0 +1,22 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    public function up(): void
+    {
+        Schema::table('recipes_spices', function (Blueprint $table) {
+            $table->decimal('amount_in_percent', 6, 2)->change();
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::table('recipes_spices', function (Blueprint $table) {
+            $table->decimal('amount_in_percent', 4, 2)->change();
+        });
+    }
+};