feat: user timezone (#17)

* Add timezone tracking and user timezone preferences

* feat: improvements

* feat: new status update

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

Author: ochmanski

apps/api/drizzle/0001_pretty_nomad.sql

@@ -0,0 +1,12 @@
+CREATE TABLE `user_timezone_history` (
+	`id` text PRIMARY KEY NOT NULL,
+	`user_id` text NOT NULL,
+	`timezone` text NOT NULL,
+	`created_at` integer NOT NULL,
+	FOREIGN KEY (`user_id`) REFERENCES `user`(`id`) ON UPDATE no action ON DELETE cascade
+);
+--> statement-breakpoint
+CREATE INDEX `user_timezone_history_user_id_index` ON `user_timezone_history` (`user_id`);--> statement-breakpoint
+CREATE INDEX `user_timezone_history_created_at_index` ON `user_timezone_history` (`created_at`);--> statement-breakpoint
+ALTER TABLE `status_update` ADD `timezone` text DEFAULT 'UTC' NOT NULL;--> statement-breakpoint
+ALTER TABLE `user` ADD `timezone` text DEFAULT 'UTC' NOT NULL;