feat(FN-3170): harden plugin bundling contract and fix verification regress

Hardened the roadmap plugin bundling contract with new output-validation tests and tsup config cleanup, then resolved regressions those changes introduced in the bundle and package-config test suites. A small dashboard UI tweak (TaskDetailModal) was also included.

Fusion-Task-Id: FN-3170

packages/dashboard/app/components/TaskDetailModal.tsx

@@ -1119,9 +1119,9 @@ export function TaskDetailContent({
     if (!canEdit || !githubTrackedIssue || isSavingGithubTracking) return;
     const confirmed = await confirm({
       title: "Unlink GitHub issue?",
-      body: "This stops Fusion from syncing with the linked GitHub issue. The issue itself will not be modified.",
+      message: "This stops Fusion from syncing with the linked GitHub issue. The issue itself will not be modified.",
       confirmLabel: "Unlink",
-      tone: "danger",
+      danger: true,
     });
     if (!confirmed) return;