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/shared/src/schemas/index.ts

@@ -81,6 +81,8 @@ export {
   RepairBatchCreateSchema,
   RepairBatchUpdateSchema,
   RepairBatchStatusUpdateSchema,
+  RepairNoteVisibility,
+  RepairNoteCreateSchema,
   RepairServiceTemplateCreateSchema,
   RepairServiceTemplateUpdateSchema,
 } from './repairs.schema.js'
@@ -93,6 +95,7 @@ export type {
   RepairBatchCreateInput,
   RepairBatchUpdateInput,
   RepairBatchStatusUpdateInput,
+  RepairNoteCreateInput,
   RepairServiceTemplateCreateInput,
   RepairServiceTemplateUpdateInput,
 } from './repairs.schema.js'

packages/shared/src/schemas/repairs.schema.ts

@@ -97,6 +97,17 @@ export const RepairBatchStatusUpdateSchema = z.object({
 })
 export type RepairBatchStatusUpdateInput = z.infer<typeof RepairBatchStatusUpdateSchema>
 
+// --- Repair Note schemas ---
+
+export const RepairNoteVisibility = z.enum(['internal', 'customer'])
+export type RepairNoteVisibility = z.infer<typeof RepairNoteVisibility>
+
+export const RepairNoteCreateSchema = z.object({
+  content: z.string().min(1),
+  visibility: RepairNoteVisibility.default('internal'),
+})
+export type RepairNoteCreateInput = z.infer<typeof RepairNoteCreateSchema>
+
 // --- Repair Service Template schemas ---
 
 export const RepairServiceTemplateCreateSchema = z.object({