feat: add Postman environment files for local and production setups

postman/CrowMate_Production.postman_environment.json

@@ -0,0 +1,37 @@
+{
+  "id": "crowmate-prod-env",
+  "name": "CrowMate — Production",
+  "values": [
+    {
+      "key": "baseUrl",
+      "value": "https://api.your-domain.com",
+      "type": "default",
+      "enabled": true,
+      "description": "Replace with your actual production API URL"
+    },
+    {
+      "key": "adminEmail",
+      "value": "admin@your-domain.com",
+      "type": "default",
+      "enabled": true,
+      "description": "Replace with your production admin email"
+    },
+    {
+      "key": "adminPassword",
+      "value": "",
+      "type": "secret",
+      "enabled": true,
+      "description": "Fill in before use — never commit this value"
+    },
+    {
+      "key": "token",
+      "value": "",
+      "type": "secret",
+      "enabled": true,
+      "description": "Auto-populated by the Login request"
+    }
+  ],
+  "_postman_variable_scope": "environment",
+  "_postman_exported_at": "2026-03-26T00:00:00.000Z",
+  "_postman_exported_using": "Claude Code"
+}