Add repair notes journal with running feed, visibility, and status tagging

New repair_note table for timestamped journal entries on tickets. Each
note captures author, content, visibility (internal or customer-facing),
and the ticket status at time of writing. Notes display as a running
feed on the ticket detail page with newest first. Internal notes have
a lock icon, customer-visible notes highlighted in blue. Supports add
and delete with appropriate permission gating.

packages/backend/src/services/repair.service.ts

@@ -5,6 +5,7 @@ import {
   repairLineItems,
   repairBatches,
   repairServiceTemplates,
+  repairNotes,
 } from '../db/schema/repairs.js'
 import type {
   RepairTicketCreateInput,
@@ -13,6 +14,7 @@ import type {
   RepairLineItemUpdateInput,
   RepairBatchCreateInput,
   RepairBatchUpdateInput,
+  RepairNoteCreateInput,
   RepairServiceTemplateCreateInput,
   RepairServiceTemplateUpdateInput,
   PaginationInput,
@@ -457,3 +459,36 @@ export const RepairServiceTemplateService = {
     return template ?? null
   },
 }
+
+export const RepairNoteService = {
+  async create(db: PostgresJsDatabase<any>, ticketId: string, authorId: string, authorName: string, ticketStatus: string, input: RepairNoteCreateInput) {
+    const [note] = await db
+      .insert(repairNotes)
+      .values({
+        repairTicketId: ticketId,
+        authorId,
+        authorName,
+        content: input.content,
+        visibility: input.visibility,
+        ticketStatus: ticketStatus as any,
+      })
+      .returning()
+    return note
+  },
+
+  async listByTicket(db: PostgresJsDatabase<any>, ticketId: string) {
+    return db
+      .select()
+      .from(repairNotes)
+      .where(eq(repairNotes.repairTicketId, ticketId))
+      .orderBy(repairNotes.createdAt)
+  },
+
+  async delete(db: PostgresJsDatabase<any>, id: string) {
+    const [note] = await db
+      .delete(repairNotes)
+      .where(eq(repairNotes.id, id))
+      .returning()
+    return note ?? null
+  },
+}