fix(build): use zod v3 two-arg form for z.record across all shared schemas

Same fix as the agent schema commit — zod 3.25 (resolved by ^3.25.0)
requires z.record() to take both key and value schemas. The single-arg
form is v4 syntax.

Fixed 15 remaining call sites across canvas, project, report, common,
webhook, habit, task, note, and milestone schemas. Pure type-only fix —
runtime behavior identical.

packages/shared/src/schemas/canvas.ts

@@ -56,7 +56,7 @@ export const canvasSchema = z.object({
     zoom: z.number().positive().default(1),
   }).optional(),
   background: z.string().optional(),
-  custom_fields: z.record(z.unknown()).optional(),
+  custom_fields: z.record(z.string(), z.unknown()).optional(),
   created: z.string().datetime(),
   updated: z.string().datetime(),
 });

packages/shared/src/schemas/common.ts

@@ -110,7 +110,7 @@ export const errorLogSchema = z.object({
   source: z.string(),
   message: z.string(),
   stack_trace: z.string().optional(),
-  metadata: z.record(z.unknown()).optional(),
+  metadata: z.record(z.string(), z.unknown()).optional(),
   resolved: z.boolean().default(false),
   created: z.string().datetime(),
   updated: z.string().datetime(),
@@ -134,11 +134,11 @@ export const queueJobSchema = z.object({
   id: z.string(),
   queue: z.string(),
   type: z.string(),
-  payload: z.record(z.unknown()),
+  payload: z.record(z.string(), z.unknown()),
   status: queueJobStatusEnum.default('pending'),
   attempts: z.number().int().nonnegative().default(0),
   max_attempts: z.number().int().positive().default(3),
-  result: z.record(z.unknown()).optional(),
+  result: z.record(z.string(), z.unknown()).optional(),
   error_message: z.string().optional(),
   scheduled_at: z.string().datetime().optional(),
   started_at: z.string().datetime().optional(),

packages/shared/src/schemas/habit.ts

@@ -62,7 +62,7 @@ export const habitSchema = z.object({
   score_config: habitScoreConfigSchema.optional(),
   active: z.boolean().default(true),
   tags: z.array(z.string()).default([]),
-  custom_fields: z.record(z.unknown()).optional(),
+  custom_fields: z.record(z.string(), z.unknown()).optional(),
   created: z.string().datetime(),
   updated: z.string().datetime(),
 });

packages/shared/src/schemas/milestone.ts

@@ -70,7 +70,7 @@ export const milestoneSchema = z.object({
   completed_at: z.string().datetime().optional(),
   tasks: z.array(z.string()).default([]),
   dependencies: z.array(milestoneDependencySchema).default([]),
-  custom_fields: z.record(z.unknown()).optional(),
+  custom_fields: z.record(z.string(), z.unknown()).optional(),
   created: z.string().datetime(),
   updated: z.string().datetime(),
 });

packages/shared/src/schemas/note.ts

@@ -53,7 +53,7 @@ export const noteSchema = z.object({
     size: z.number(),
     url: z.string(),
   })).default([]),
-  custom_fields: z.record(z.unknown()).optional(),
+  custom_fields: z.record(z.string(), z.unknown()).optional(),
   created: z.string().datetime(),
   updated: z.string().datetime(),
 });

packages/shared/src/schemas/project.ts

@@ -14,7 +14,7 @@ export const projectSettingsSchema = z.object({
   pomodoro_focus_minutes: z.number().int().positive().default(25),
   pomodoro_break_minutes: z.number().int().positive().default(5),
   notifications_enabled: z.boolean().default(true),
-  custom_fields: z.record(z.unknown()).optional(),
+  custom_fields: z.record(z.string(), z.unknown()).optional(),
 });
 
 // ── Project Schema ───────────────────────────────────────────────────────────
@@ -33,7 +33,7 @@ export const projectSchema = z.object({
   target_date: z.string().datetime().optional(),
   completed_at: z.string().datetime().optional(),
   settings: projectSettingsSchema.optional(),
-  custom_fields: z.record(z.unknown()).optional(),
+  custom_fields: z.record(z.string(), z.unknown()).optional(),
   created: z.string().datetime(),
   updated: z.string().datetime(),
 });

packages/shared/src/schemas/report.ts

@@ -14,7 +14,7 @@ export const reportTemplateSchema = z.object({
   sections: z.array(z.object({
     title: z.string(),
     type: z.enum(['summary', 'chart', 'table', 'list', 'text']).default('text'),
-    config: z.record(z.unknown()).optional(),
+    config: z.record(z.string(), z.unknown()).optional(),
     sort_order: z.number().int().nonnegative().default(0),
   })).default([]),
   created: z.string().datetime(),
@@ -42,14 +42,14 @@ export const reportSchema = z.object({
   sections: z.array(z.object({
     title: z.string(),
     content: z.string().optional(),
-    data: z.record(z.unknown()).optional(),
+    data: z.record(z.string(), z.unknown()).optional(),
     sort_order: z.number().int().nonnegative().default(0),
   })).default([]),
   summary: z.string().optional(),
   is_draft: z.boolean().default(true),
   generated_at: z.string().datetime().optional(),
   tags: z.array(z.string()).default([]),
-  custom_fields: z.record(z.unknown()).optional(),
+  custom_fields: z.record(z.string(), z.unknown()).optional(),
   created: z.string().datetime(),
   updated: z.string().datetime(),
 });

packages/shared/src/schemas/task.ts

@@ -47,7 +47,7 @@ export const taskSchema = z.object({
   attachments: z.array(attachmentSchema).default([]),
   dependencies: z.array(z.string()).default([]),
   subtasks: z.array(subtaskSchema).default([]),
-  custom_fields: z.record(z.unknown()).optional(),
+  custom_fields: z.record(z.string(), z.unknown()).optional(),
   completed_at: z.string().datetime().optional(),
   created: z.string().datetime(),
   updated: z.string().datetime(),

packages/shared/src/schemas/webhook.ts

@@ -6,7 +6,7 @@ export const webhookDeliverySchema = z.object({
   id: z.string(),
   webhook_id: z.string(),
   event: z.string(),
-  payload: z.record(z.unknown()),
+  payload: z.record(z.string(), z.unknown()),
   status: z.enum(['success', 'failed', 'pending']).default('pending'),
   status_code: z.number().int().optional(),
   response_body: z.string().optional(),
@@ -30,7 +30,7 @@ export const webhookSchema = z.object({
   headers: z.record(z.string()).optional(),
   retry_count: z.number().int().nonnegative().default(3),
   last_triggered_at: z.string().datetime().optional(),
-  custom_fields: z.record(z.unknown()).optional(),
+  custom_fields: z.record(z.string(), z.unknown()).optional(),
   created: z.string().datetime(),
   updated: z.string().datetime(),
 });