Add retroactive task specs for ad-hoc changes

tasks/spec-in-detail/SPEC.md

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+# SPEC: Display SPEC.md Content in Task Detail Panel
+
+## Overview
+
+The task detail panel shows verdict and bug report content but not the task's SPEC.md. Users need to see the specification when reviewing a task.
+
+## Changes
+
+- Add `spec_content` field to API responses (`_serve_tasks`, `_serve_task`)
+- Display SPEC.md content in the detail panel under a "Specification" section
+
+## Acceptance Criteria
+
+- [ ] SPEC.md content appears in detail panel
+- [ ] API serves `spec_content` for all tasks
+
+## VERDICT
+
+PASS — implemented in commit 01d8451