99fa0ff08e
Bump hard-coded provider defaults to the May 2026 lineup: - Anthropic: claude-sonnet-4-6 (default); Opus 4.7 and Haiku 4.5 in the fallback list. 4.6/4.7 generation has 1M context standard. - OpenAI: gpt-5.5 (default); 5.5-pro / 5.2 / 5.2-chat-latest in fallback. ThinkingModes now baseline on GPT-5.x. - Google: gemini-3.5-flash (default); 3.1 Pro / Flash Lite in fallback. - Mistral: mistral-large-latest unchanged (Mistral Large 3); add mistral-medium-3.5, mistral-medium-2511, mistral-large-2512 to the rate-limit map. Legacy dated IDs retained in fallback lists and ratelimits maps so configs pinned to claude-sonnet-4-20250514 / gpt-4o / gemini-2.5-flash keep resolving. Capability tables (ContextWindow, MaxOutput, ThinkingModes) updated to match each generation. CLI help text in cmd/gnoma/main.go also updated.