feat(pi): add 'max' thinking level

[KorenKrita]

Problem

Pi's --thinking flag accepts 7 levels: off, minimal, low, medium, high, xhigh, max. However, hapi only defines 6 levels in PI_THINKING_LEVELS (missing max), so models that support max thinking cannot expose it in the UI.

Changes

• Add 'max' to PI_THINKING_LEVELS and PI_THINKING_LEVEL_LABELS in shared/src/piThinkingLevel.ts
• Update ALL_LEVELS in PiThinkingLevelPanel.tsx to include max
• Update isThinkingLevelSupported() in piThinkingLevelOptions.ts so max (like xhigh) requires explicit opt-in via the model's thinkingLevelMap

Behavior

• Models that include max in their thinkingLevelMap will now show it as a selectable thinking level
• Models without max in their map are unaffected (opt-in required, same as xhigh)
• No breaking changes to existing behavior

[github-actions]

Findings

• [Blocker] Missing branch close breaks TypeScript parsing — the new xhigh || max branch never closes before the default map fallback, leaving the helper with unbalanced braces and preventing the web package from compiling. Evidence web/src/components/AssistantChat/piThinkingLevelOptions.ts:61
  Suggested fix:

  if (level === 'xhigh' || level === 'max') {
      if (!map || !(level in map)) return false
      return map[level] !== null
  }
  
  if (!map || !(level in map)) return true
  return map[level] !== null

Questions

• None.

Summary

• Review mode: initial
• One build-blocking syntax regression found. Residual risk: automation was not run in this review pass.

Testing

• Not run (automation)

HAPI Bot

[github-actions]

Findings

• None.

Questions

• None.

Summary

• Review mode: follow-up after new commits
• No issues found in the latest full diff. The prior bot blocker in web/src/components/AssistantChat/piThinkingLevelOptions.ts is fixed in the new commit.
• Residual risk: no dedicated test coverage found for Pi thinking-level option filtering in web/src/components/AssistantChat/piThinkingLevelOptions.ts.

Testing

• Not run (automation/static review only)

HAPI Bot