opencode 1.18.4: adaptive thinking for Kimi models, Azure endpoint fix, desktop prompt input rewrite

Core

• Adaptive thinking controls for Kimi models on Anthropic-compatible providers, summarized reasoning output by default
• Provider-defined reasoning options now respected instead of falling back to the wrong reasoning controls
• Azure Cognitive Services endpoint support restored for Azure-hosted models
• Reduced OpenAI provider header timeouts during slow connection setup

Desktop

• v2 prompt input rewritten for more reliable command, context, shell, attachment and history interactions
• Embedded terminal theme synced with the app theme
• Review panel: open file tabs stay aligned with the current diff view; improved resizing and sticky controls
• Fixes: command drafts preserved in the command menu; no session-view failure on missing message parent links; empty prompt text parts blocked; model variant selection accessibility restored; keybind tooltips on prompt input controls; deduplicated file entries in diff summaries; recovery window no longer touches destroyed windows