Jul 28 - Update the demo request button, and add demo registration page

add_demo.sql

@@ -0,0 +1,20 @@
+-- Additive migration: demo appointment requests from the public page.
+-- Idempotent — safe to re-run.
+
+USE jqc_features;
+
+CREATE TABLE IF NOT EXISTS demo_request (
+  id             INT AUTO_INCREMENT PRIMARY KEY,
+  name           VARCHAR(120) NOT NULL,
+  company        VARCHAR(160) NULL,
+  email          VARCHAR(200) NOT NULL,
+  phone          VARCHAR(40) NULL,
+  preferred_date DATE NOT NULL,
+  preferred_time VARCHAR(5) NOT NULL,          -- 'HH:MM', local business hours
+  message        TEXT NULL,
+  status         VARCHAR(16) NOT NULL DEFAULT 'new',  -- new/scheduled/done/cancelled
+  source_ip      VARCHAR(45) NULL,
+  created_at     DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+  KEY idx_demo_slot (preferred_date, preferred_time),
+  KEY idx_demo_status (status)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;