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/tmux-manager.ts

@@ -882,6 +882,8 @@ export function buildSpawnCommand(options: {
   ompConfig?: OmpConfig;
   resumeSessionId?: string;
   effort?: EffortLevel;
+  /** Claude advisor model, merged into the launch's one `--settings` JSON (see buildAdvisorSettings). */
+  advisorModel?: string;
   /** Resolved by resolveStatusLineCliCommand (hooks-config.ts) — undefined skips the exporter. Claude only. */
   statusLineCommand?: string;
   /** Name pinned on claude as `--name` (version-gated, sanitized; local spawns only). Only a user-chosen name: see `Session.cliPinnedName`. */
@@ -2083,6 +2085,7 @@ export class TmuxManager extends EventEmitter implements TerminalMultiplexer {
       resumeSessionId,
       envOverrides,
       effort,
+      advisorModel,
       historyLimit = DEFAULT_TMUX_HISTORY_LIMIT,
       remote,
       docker,
@@ -2170,6 +2173,7 @@ export class TmuxManager extends EventEmitter implements TerminalMultiplexer {
       ompConfig,
       resumeSessionId,
       effort,
+      advisorModel,
       statusLineCommand,
       sessionName: cliName,
     });
@@ -2397,6 +2401,7 @@ export class TmuxManager extends EventEmitter implements TerminalMultiplexer {
       envOverrides,
       unsetEnvKeys,
       effort,
+      advisorModel,
       remote,
       docker,
       cliName,
@@ -2435,6 +2440,7 @@ export class TmuxManager extends EventEmitter implements TerminalMultiplexer {
       ompConfig,
       resumeSessionId,
       effort,
+      advisorModel,
       statusLineCommand,
       sessionName: cliName,
     });