feat: make the two-step reflection observable (draft -> revised -> critique)

You couldn't see her actually correct herself — /self showed only the result.
Now:
- reflect() logs the draft, the revised/committed version, and the self-critique
  to the live log as an expandable "view details" block
- POST /self/reflect runs a reflection in the web process so it lands in /logs
  live (reflections normally run in the dream process, whose logs only go to
  journald); "↻ Reflect now" button on /self triggers it, with a logs ↗ link
- log viewers relabel the expander "view full prompt" -> "view details" (it now
  carries prompts and reflection diffs)

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

lyra/web/static/index.html

@@ -756,7 +756,7 @@
           <span class="log-level log-level-${level}">${escapeHtml(level)}</span>
           <span class="log-msg">${escapeHtml(event.msg || '')}</span>
           ${fieldStr ? `<span class="log-fields">${escapeHtml(fieldStr)}</span>` : ''}
-          ${detail ? `<details class="log-detail"><summary>view full prompt</summary><pre>${escapeHtml(detail)}</pre></details>` : ''}
+          ${detail ? `<details class="log-detail"><summary>view details</summary><pre>${escapeHtml(detail)}</pre></details>` : ''}
         `;
 
         thinkingContent.appendChild(eventDiv);