fix(types): resolve zod v3 type inference differences in task tools

zod v3 infers .default([]) fields as string[] | undefined in z.infer
output type (unlike v4 which marks them as string[]). Add nullish
coalescing guards and use any[] for the readJsonSafe result array
to avoid the type mismatch in task-list and task-update.

Author: code-yeongyu

src/tools/task/task-list.ts

@@ -37,7 +37,8 @@ Returns summary format: id, subject, status, owner, blockedBy (not full descript
         return JSON.stringify({ tasks: [] })
       }
 
-      const allTasks: TaskObject[] = []
+      // eslint-disable-next-line @typescript-eslint/no-explicit-any
+      const allTasks: any[] = []
       for (const fileId of files) {
         const task = readJsonSafe(join(taskDir, `${fileId}.json`), TaskObjectSchema)
         if (task) {
@@ -55,7 +56,7 @@ Returns summary format: id, subject, status, owner, blockedBy (not full descript
       // Build summary with filtered blockedBy
       const summaries: TaskSummary[] = activeTasks.map((task) => {
         // Filter blockedBy to only include unresolved (non-completed) blockers
-        const unresolvedBlockers = task.blockedBy.filter((blockerId) => {
+        const unresolvedBlockers = (task.blockedBy ?? []).filter((blockerId: string) => {
           const blockerTask = taskMap.get(blockerId)
           // Include if blocker doesn't exist (missing) or if it's not completed
           return !blockerTask || blockerTask.status !== "completed"

src/tools/task/task-update.ts

@@ -114,12 +114,12 @@ async function handleUpdate(
 
       const addBlocks = args.addBlocks as string[] | undefined;
       if (addBlocks) {
-        task.blocks = [...new Set([...task.blocks, ...addBlocks])];
+        task.blocks = [...new Set([...(task.blocks ?? []), ...addBlocks])];
       }
 
       const addBlockedBy = args.addBlockedBy as string[] | undefined;
       if (addBlockedBy) {
-        task.blockedBy = [...new Set([...task.blockedBy, ...addBlockedBy])];
+        task.blockedBy = [...new Set([...(task.blockedBy ?? []), ...addBlockedBy])];
       }
 
       if (validatedArgs.metadata !== undefined) {