switch default to llama-3.1-8b-instant

switch to gemma2-9b-it; shorten system prompt to reduce token usage

remove function calling (unsupported by API proxy), use plain chat only

switch default to llama-3.3-70b-versatile for better function calling support

default to llama-3.1-8b-instant; trim system prompt and tool descriptions to reduce token overhead

add built-in read_file/write_file/list_files tools; re-add tool_choice to API calls

use INFERENCE_API_URL as-is, no endpoint construction

fix endpoint construction when INFERENCE_API_URL already includes /gen/chat/completions

add 503 fallback: retry without tools then fall back to Gen endpoint

fix default model to 'lightning' for InferencePort API compatibility

add model dropdown and fix stuck thinking indicator

Initial commit - Forge: self-improving AI assistant with filesystem access for self-editing