fix(browser): correct GPT-5.2 model selection and add thinking time parameter

[manmal]

Fixes #46

Problem

The browser model selection was incorrectly mapping GPT-5.2 variants:

• gpt-5.2-instant was mapped to "Auto" instead of "Instant"
• gpt-5.2-thinking didn't exist as a CLI option
• --browser-extended-thinking only supported "Extended" level, not Light/Standard/Heavy
• The fuzzy matching algorithm would sometimes select the wrong variant (e.g., "Thinking" when "Auto" was requested)

Additionally, having fine-grained control over thinking time is useful when using oracle as a tool from AI coding agents (e.g., pi). For quick web searches or simple queries, a minimal thinking budget keeps responses fast; for complex reasoning tasks, extended thinking is preferred (and don't always need to use Pro for those).

Summary

⚠️ I haven't tested API modes, but should be fine. The only file that could affect API is src/cli/options.ts (changes to inferModelFromLabel).

• Model Selection Fix: Correctly select Auto/Thinking/Instant/Pro variants in ChatGPT UI
  • Order BROWSER_MODEL_LABELS by specificity (most specific first)
  • Add exact testid match bonus in scoring algorithm
  • Fix buttonMatchesTarget() to reject unwanted variants (e.g., don't accept "Thinking" when "Auto" requested)
  • Add scoring penalties for thinking/instant when not requested
• Thinking Time Parameter: Add --browser-thinking-time <light|standard|extended|heavy> option
• Backward Compatibility: Keep --browser-extended-thinking as deprecated alias mapping to extended
• UI Stall Workaround: Add page refresh after prompt submission to fix UI stalling with "thinking" indicator

Test plan

• gpt-5.2 → ChatGPT 5.2 (Auto)
• gpt-5.2-thinking → ChatGPT 5.2 Thinking
• gpt-5.2-instant → ChatGPT 5.2 Instant
• gpt-5.2-pro → ChatGPT 5.2 Pro
• --browser-extended-thinking selects Extended thinking time (kept for backward compat, but could be removed as well)
• --browser-thinking-time extended selects Extended thinking time
• --browser-thinking-time light selects Light thinking time
• --browser-thinking-time heavy selects Heavy thinking time
• Build passes (pnpm build)

[steipete]

Thanks Manuel!