feat: add AI recommendations flow for tenders

Implement company AI onboarding/recommendation models, services, repository, and tender UI integration with supporting tests.

Co-authored-by: Cursor <cursoragent@cursor.com>

lib/data/services/api/company_ai_api.dart

@@ -0,0 +1,14 @@
+/// Backend endpoints that power AI-based tender recommendations.
+///
+/// The app talks only to the backend; it gathers company data, forwards it to
+/// the AI service and returns results in the standard API envelope. The
+/// `company_id` is read from the JWT, so neither endpoint takes a request body.
+class CompanyAiApi {
+  CompanyAiApi._();
+
+  /// Registers the company with the AI service. Asynchronous on the AI side.
+  static const String onboarding = '/api/v1/onboarding';
+
+  /// Fetches ranked AI tender recommendations for the company.
+  static const String recommend = '/api/v1/recommend';
+}