reimplement agent,provider and add file history

internal/llm/tools/file.go

@@ -3,8 +3,6 @@ package tools
 import (
 	"sync"
 	"time"
-
-	"github.com/kujtimiihoxha/termai/internal/config"
 )
 
 // File record to track when files were read/written
@@ -19,14 +17,6 @@ var (
 	fileRecordMutex sync.RWMutex
 )
 
-func removeWorkingDirectoryPrefix(path string) string {
-	wd := config.WorkingDirectory()
-	if len(path) > len(wd) && path[:len(wd)] == wd {
-		return path[len(wd)+1:]
-	}
-	return path
-}
-
 func recordFileRead(path string) {
 	fileRecordMutex.Lock()
 	defer fileRecordMutex.Unlock()