Deferred backlog: attachments, canned responses, tags, search, notifications, password change

Attachments: file storage on the same data volume, serving route with
dual auth (session or portal/widget token, internal-note attachments
never token-servable), inbound ingestion from email (mailparser) and
Telegram (photo/document handlers), outbound delivery via SMTP
attachments and Telegram sendDocument/sendPhoto, upload UI (paperclip +
pending-file chip) on all three reply surfaces. Extracted
lib/tickets/delivery.ts so the text-only and attachment-upload admin
routes share one channel-delivery code path instead of duplicating it.

Canned responses: CRUD + a popover picker in the reply box that inserts
a saved template into the draft.

Tags: fixed 6-color palette reusing existing soft-badge tokens, a picker
on the ticket page, colored chips + a filter row on the dashboard.

Search: LIKE-based (not FTS5 — simpler and sufficient at this volume)
across ticket subject, customer name, and message bodies; a debounced
search box on the dashboard.

Desktop notifications: permission toggle + a background subscriber that
fires for new tickets and customer messages while the tab is hidden,
clicking one navigates to the ticket.

Password change: new account settings page, verifies the current
password before updating.

Nav: gear-menu settings list now includes Шаблоны ответов/Теги/Аккаунт.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QcXH24ky6zjk2UyK5oZUPH

src/lib/db/migrations/0004_familiar_kronos.sql

@@ -0,0 +1,33 @@
+CREATE TABLE `attachments` (
+	`id` text PRIMARY KEY NOT NULL,
+	`message_id` text NOT NULL,
+	`filename` text NOT NULL,
+	`mime_type` text NOT NULL,
+	`size_bytes` integer NOT NULL,
+	`storage_key` text NOT NULL,
+	`created_at` integer DEFAULT (unixepoch('subsec') * 1000) NOT NULL,
+	FOREIGN KEY (`message_id`) REFERENCES `messages`(`id`) ON UPDATE no action ON DELETE cascade
+);
+--> statement-breakpoint
+CREATE TABLE `canned_responses` (
+	`id` text PRIMARY KEY NOT NULL,
+	`title` text NOT NULL,
+	`body` text NOT NULL,
+	`created_at` integer DEFAULT (unixepoch('subsec') * 1000) NOT NULL
+);
+--> statement-breakpoint
+CREATE TABLE `tags` (
+	`id` text PRIMARY KEY NOT NULL,
+	`name` text NOT NULL,
+	`color` text DEFAULT 'accent' NOT NULL,
+	`created_at` integer DEFAULT (unixepoch('subsec') * 1000) NOT NULL
+);
+--> statement-breakpoint
+CREATE UNIQUE INDEX `tags_name_unique` ON `tags` (`name`);--> statement-breakpoint
+CREATE TABLE `ticket_tags` (
+	`ticket_id` text NOT NULL,
+	`tag_id` text NOT NULL,
+	PRIMARY KEY(`ticket_id`, `tag_id`),
+	FOREIGN KEY (`ticket_id`) REFERENCES `tickets`(`id`) ON UPDATE no action ON DELETE cascade,
+	FOREIGN KEY (`tag_id`) REFERENCES `tags`(`id`) ON UPDATE no action ON DELETE cascade
+);