feat: add treasury audit, attachment download, and installment SMS

Let cheque clearance pick a cash account and export income, expense, and installment lists to Excel.

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/api/src/treasury/treasury.controller.ts

@@ -95,6 +95,35 @@ export class TreasuryController {
     return this.treasury.createDocument(user, body);
   }
 
+  @Get('documents/export')
+  async exportDocuments(
+    @CurrentUser() user: Actor,
+    @Query('kind') kind?: string,
+  ) {
+    const buffer = await this.treasury.documentsExcel(
+      user,
+      kind === 'expense' ? 'expense' : 'income',
+    );
+    return new StreamableFile(buffer, {
+      type: 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
+      disposition: 'attachment; filename="treasury-documents.xlsx"',
+    });
+  }
+
+  @Get('attachments/:id')
+  async downloadAttachment(@CurrentUser() user: Actor, @Param('id') id: string) {
+    const file = await this.treasury.openAttachment(user, id);
+    return new StreamableFile(file.stream, {
+      type: file.mimeType,
+      disposition: `attachment; filename="${encodeURIComponent(file.fileName)}"`,
+    });
+  }
+
+  @Get('audit')
+  audit(@CurrentUser() user: Actor) {
+    return this.treasury.listAudit(user);
+  }
+
   @Post('documents/:id/attachments')
   @UseInterceptors(FileInterceptor('file', { storage: memoryStorage(), limits: { fileSize: 8_000_000 } }))
   addAttachment(
@@ -114,6 +143,15 @@ export class TreasuryController {
     return this.treasury.settleDocument(user, id, body);
   }
 
+  @Get('receivables/export')
+  async exportReceivables(@CurrentUser() user: Actor) {
+    const buffer = await this.receivables.excel(user);
+    return new StreamableFile(buffer, {
+      type: 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
+      disposition: 'attachment; filename="treasury-installments.xlsx"',
+    });
+  }
+
   @Get('receivables')
   receivablesList(@CurrentUser() user: Actor) {
     return this.receivables.list(user);