feat: clinic-wide AI (analytics/earnings/inventory + invoice-from-file),

real Live card, persistent chat history

Analytics & earnings:
- Analytics now carries real money computed from invoices (billed/paid/
  outstanding + by-month); new Earnings section on the Analysis page drawn with
  the project's Bklit chart components (shared EarningsChart).

AI agent reaches the whole clinic:
- new read tools getClinicInfo / getAnalytics / listInventory render clinic,
  analytics (with a Bklit earnings chart) and inventory cards in chat
- proposeInvoice turns an uploaded purchase/medication list into an invoice
  (new "invoice" action-preview kind → createInvoice); invoices/appointments
  auto-create/link a patient (ensurePatient) so they hit the Patients page

Live card:
- plots real data — patients checked in today — via GET /api/analytics/live
  (polled); value pill clamped and margins widened so nothing spills the card

Persistent AI chat history (Claude-style):
- ai_chat_threads + ai_chat_messages (migration 0016); per-user, org-scoped
  thread CRUD under /api/chat/threads
- chat panel owns a thread id, loads /?thread=<id>, and auto-saves after each
  exchange; sidebar lists past chats (open/delete), "New chat" starts fresh

Verified with backend typecheck + frontend tsc + next build.

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

backend/drizzle/0016_past_maestro.sql

@@ -0,0 +1,23 @@
+CREATE TABLE "ai_chat_messages" (
+	"id" text PRIMARY KEY NOT NULL,
+	"thread_id" text NOT NULL,
+	"position" integer NOT NULL,
+	"role" text NOT NULL,
+	"parts" jsonb NOT NULL,
+	"created_at" timestamp DEFAULT now() NOT NULL
+);
+--> statement-breakpoint
+CREATE TABLE "ai_chat_threads" (
+	"id" text PRIMARY KEY NOT NULL,
+	"organization_id" text NOT NULL,
+	"user_id" text NOT NULL,
+	"title" text DEFAULT 'New chat' NOT NULL,
+	"created_at" timestamp DEFAULT now() NOT NULL,
+	"updated_at" timestamp DEFAULT now() NOT NULL
+);
+--> statement-breakpoint
+ALTER TABLE "ai_chat_messages" ADD CONSTRAINT "ai_chat_messages_thread_id_ai_chat_threads_id_fk" FOREIGN KEY ("thread_id") REFERENCES "public"."ai_chat_threads"("id") ON DELETE cascade ON UPDATE no action;--> statement-breakpoint
+ALTER TABLE "ai_chat_threads" ADD CONSTRAINT "ai_chat_threads_organization_id_organization_id_fk" FOREIGN KEY ("organization_id") REFERENCES "public"."organization"("id") ON DELETE cascade ON UPDATE no action;--> statement-breakpoint
+ALTER TABLE "ai_chat_threads" ADD CONSTRAINT "ai_chat_threads_user_id_user_id_fk" FOREIGN KEY ("user_id") REFERENCES "public"."user"("id") ON DELETE cascade ON UPDATE no action;--> statement-breakpoint
+CREATE INDEX "ai_messages_thread_idx" ON "ai_chat_messages" USING btree ("thread_id","position");--> statement-breakpoint
+CREATE INDEX "ai_threads_org_user_idx" ON "ai_chat_threads" USING btree ("organization_id","user_id");

backend/drizzle/meta/_journal.json

@@ -113,6 +113,13 @@
       "when": 1781455848772,
       "tag": "0015_polite_captain_marvel",
       "breakpoints": true
+    },
+    {
+      "idx": 16,
+      "version": "7",
+      "when": 1781464772532,
+      "tag": "0016_past_maestro",
+      "breakpoints": true
     }
   ]
 }