Fix issues and add linting

shared/src/schemas/index.ts

@@ -109,8 +109,10 @@ export const smsSitesConfigSchema = z.object({
 export type SmsSitesConfig = z.infer<typeof smsSitesConfigSchema>;
 
 // ── Edit Request ──
+// message is required for propose requests but optional for confirm requests.
+// The handler enforces that message is non-empty when confirm is absent.
 export const editRequestSchema = z.object({
-  message: z.string().min(1),
+  message: z.string().default(''),
   repo_relative_path: z.string().optional(),
   proposal_id: z.string().optional(),
   confirm: z.enum(['yes', 'no']).optional(),