Add enterprise inquiry form with headcount filter, wire /api/enterprise-inquiry

src/main.el

@@ -239,6 +239,28 @@ fn handle_request(method: String, path: String, body: String) -> String {
         return "{\"__status__\":500,\"error\":\"Stripe session creation failed\"}"
     }
 
+    // ── Enterprise inquiry ────────────────────────────────────────────────────
+    if str_eq(path, "/api/enterprise-inquiry") {
+        let resend_key: String = state_get("__resend_api_key__")
+        let name_val: String = if str_contains(body, "\"name\"") { "submitted" } else { "" }
+        if str_eq(name_val, "") {
+            return "{\"error\":\"invalid request\"}"
+        }
+        // Log to stdout regardless of email delivery
+        println("[enterprise-inquiry] " + body)
+        // Send via Resend if key is configured
+        if !str_eq(resend_key, "") {
+            let email_body: String = "{\"from\":\"Neuron Enterprise <enterprise@neurontechnologies.ai>\",\"to\":[\"enterprise@neurontechnologies.ai\"],\"subject\":\"Enterprise Inquiry\",\"text\":" + body + "}"
+            let resp: String = http_post_auth(
+                "https://api.resend.com/emails",
+                resend_key,
+                email_body
+            )
+            println("[enterprise-inquiry] resend: " + resp)
+        }
+        return "{\"received\":true}"
+    }
+
     // ── Stripe webhook ────────────────────────────────────────────────────────
     if str_eq(path, "/api/webhooks/stripe") {
         if str_contains(body, "checkout.session.completed") {
@@ -322,11 +344,13 @@ let stripe_pub_key: String = env("STRIPE_PUBLISHABLE_KEY")
 let stripe_price_founding: String = env("STRIPE_PRICE_FOUNDING")
 let stripe_price_professional: String = env("STRIPE_PRICE_PROFESSIONAL")
 let license_api_url: String = env("NEURON_LICENSE_API_URL")
+let resend_api_key: String = env("RESEND_API_KEY")
 state_set("__stripe_secret_key__",        stripe_key)
 state_set("__stripe_publishable_key__",   stripe_pub_key)
 state_set("__stripe_price_founding__",    stripe_price_founding)
 state_set("__stripe_price_professional__", stripe_price_professional)
 state_set("__license_api_url__",          license_api_url)
+state_set("__resend_api_key__",           resend_api_key)
 
 println(color_bold("Neuron landing") + " — http://localhost:3001")
 println("  HTML generated by El → " + html_path)