feat(claude): advisor tool support, per session and as an App Settings default

Claude Code's advisor tool (code.claude.com/docs/en/advisor) lets the session's
main model consult a second, stronger model at decision points: before
committing to an approach, on a recurring error, and before declaring a task
done. Codeman can now start claude sessions with one.

- `advisorModel` field on POST /api/sessions, /api/quick-start and
  /api/ralph-loop/start (fable, opus, sonnet or a full model id in those
  families; haiku cannot advise and is refused). Stored on the session and
  persisted, so respawn, boot restore and reboot restore keep it. Remote and
  docker quick-starts refuse it, as they refuse effort.
- App Settings, Models, "Advisor" segment (Default / Sonnet / Opus / Fable),
  synced as `claudeAdvisorModel`. Run, resume and the Ralph wizard send it.
  Default sends nothing, leaving the CLI's own /advisor choice in charge.
- Carried as the `advisorModel` key in the launch's single --settings JSON,
  merged with ultracode and the statusLine exporter, never the --advisor
  flag: `claude --advisor haiku` exits 1 at launch, which would leave a dead
  pane on every respawn, while the settings key degrades to no advisor. A
  launch without an advisor is byte-identical to before.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

src/web/public/index.html

@@ -2172,6 +2172,19 @@
                       <option value="ultracode">Ultracode</option>
                     </select>
                   </div>
+                  <div class="set-row set-row-block" data-search="advisor fable opus sonnet second opinion review consult">
+                    <div class="set-row-text">
+                      <span class="set-row-label">Advisor</span>
+                      <span class="set-row-desc">A stronger model Claude consults before big decisions, on repeated errors and before calling a task done. Uses extra tokens. Switchable in-session with /advisor.</span>
+                    </div>
+                    <div class="set-segment" id="appSettingsAdvisorSegment" role="radiogroup" aria-label="Advisor"></div>
+                    <select id="appSettingsClaudeAdvisor" class="set-select set-field-hidden" aria-hidden="true" tabindex="-1">
+                      <option value="">Default</option>
+                      <option value="sonnet">Sonnet</option>
+                      <option value="opus">Opus</option>
+                      <option value="fable">Fable</option>
+                    </select>
+                  </div>
                 </div>
               </div>