feat: auth system, scrip scheduler, UI widgets, and new API routes

- Add session-based authentication (login page, middleware, auth context)
- Add cron-like scrip scheduler for time-based conditions
- Add layout builder, scrip wizard, searchable select components
- Add trend chart widget for dashboards
- Add notifications, attachments, queue-permissions API routes
- Add seed-users script
- Update schema with 10 new migrations (0008-0017)
- Apply redesign: Linear-inspired dark theme, conversation-centric UI
- Gitignore runtime data directory

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

drizzle/migrations/0015_tense_patch.sql

@@ -0,0 +1,15 @@
+CREATE TABLE "notifications" (
+	"id" uuid PRIMARY KEY DEFAULT gen_random_uuid() NOT NULL,
+	"user_id" uuid NOT NULL,
+	"ticket_id" integer,
+	"type" text NOT NULL,
+	"title" text NOT NULL,
+	"body" text,
+	"read" boolean DEFAULT false NOT NULL,
+	"created_at" timestamp with time zone DEFAULT now()
+);
+--> statement-breakpoint
+ALTER TABLE "notifications" ADD CONSTRAINT "notifications_user_id_users_id_fk" FOREIGN KEY ("user_id") REFERENCES "public"."users"("id") ON DELETE cascade ON UPDATE no action;--> statement-breakpoint
+ALTER TABLE "notifications" ADD CONSTRAINT "notifications_ticket_id_tickets_id_fk" FOREIGN KEY ("ticket_id") REFERENCES "public"."tickets"("id") ON DELETE cascade ON UPDATE no action;--> statement-breakpoint
+CREATE INDEX "notifications_user_id_idx" ON "notifications" USING btree ("user_id");--> statement-breakpoint
+CREATE INDEX "notifications_user_read_idx" ON "notifications" USING btree ("user_id","read");