fix(API): 견적 관리 필드 저장/조회 개선

- QuoteStoreRequest/UpdateRequest: manager, contact, remarks 필드 추가
- QuoteController: store에서 validated 데이터 로깅 추가 (디버깅용)
- QuoteService: manager, contact, remarks 필드 저장/조회 로직 추가
- FormulaEvaluatorService: BOM 계산 서비스 개선

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

app/Http/Requests/Quote/QuoteStoreRequest.php

@@ -12,6 +12,24 @@ public function authorize(): bool
         return true;
     }
 
+    /**
+     * 프론트엔드 필드명을 백엔드 필드명으로 정규화
+     * manager_name → manager, manager_contact → contact
+     */
+    protected function prepareForValidation(): void
+    {
+        $mappings = [
+            'manager_name' => 'manager',
+            'manager_contact' => 'contact',
+        ];
+
+        foreach ($mappings as $from => $to) {
+            if ($this->has($from) && ! $this->has($to)) {
+                $this->merge([$to => $this->input($from)]);
+            }
+        }
+    }
+
     public function rules(): array
     {
         return [

app/Http/Requests/Quote/QuoteUpdateRequest.php

@@ -12,6 +12,24 @@ public function authorize(): bool
         return true;
     }
 
+    /**
+     * 프론트엔드 필드명을 백엔드 필드명으로 정규화
+     * manager_name → manager, manager_contact → contact
+     */
+    protected function prepareForValidation(): void
+    {
+        $mappings = [
+            'manager_name' => 'manager',
+            'manager_contact' => 'contact',
+        ];
+
+        foreach ($mappings as $from => $to) {
+            if ($this->has($from) && ! $this->has($to)) {
+                $this->merge([$to => $this->input($from)]);
+            }
+        }
+    }
+
     public function rules(): array
     {
         return [