refactor: migrate str-replace handler to agent-runtime package

Moved backend/src/tools/handlers/tool/str-replace.ts to packages/agent-runtime/src/tools/handlers/tool/str-replace.ts following the agent-runtime migration plan.

Changes:
- Moved str-replace handler to agent-runtime package
- Updated imports to use relative paths within agent-runtime
- Updated backend/src/tools/handlers/list.ts to import from @codebuff/agent-runtime
- All type checks passed
- All tests passed in both backend and agent-runtime

🤖 Generated with Codebuff
Co-Authored-By: Codebuff <noreply@codebuff.com>

Author: charleslien

backend/src/tools/handlers/list.ts

@@ -18,9 +18,10 @@ import { handleThinkDeeply } from '@codebuff/agent-runtime/tools/handlers/tool/t
 import { handleUpdateSubgoal } from '@codebuff/agent-runtime/tools/handlers/tool/update-subgoal'
 import { handleWriteFile } from '@codebuff/agent-runtime/tools/handlers/tool/write-file'
 
+import { handleStrReplace } from '@codebuff/agent-runtime/tools/handlers/tool/str-replace'
+
 import { handleSpawnAgentInline } from './tool/spawn-agent-inline'
 import { handleSpawnAgents } from './tool/spawn-agents'
-import { handleStrReplace } from './tool/str-replace'
 import { handleWebSearch } from './tool/web-search'
 
 import type { CodebuffToolHandlerFunction } from '@codebuff/agent-runtime/tools/handlers/handler-function-type'

…d/src/tools/handlers/tool/str-replace.ts …e/src/tools/handlers/tool/str-replace.tsbackend/src/tools/handlers/tool/str-replace.ts renamed to packages/agent-runtime/src/tools/handlers/tool/str-replace.ts backend/src/tools/handlers/tool/str-replace.ts renamed to packages/agent-runtime/src/tools/handlers/tool/str-replace.ts

@@ -1,11 +1,14 @@
-import { getFileProcessingValues, postStreamProcessing } from '@codebuff/agent-runtime/tools/handlers/tool/write-file'
-import { processStrReplace } from '@codebuff/agent-runtime/process-str-replace'
+import { processStrReplace } from '../../../process-str-replace'
+import {
+  getFileProcessingValues,
+  postStreamProcessing,
+} from './write-file'
 
+import type { CodebuffToolHandlerFunction } from '../handler-function-type'
 import type {
   FileProcessingState,
   OptionalFileProcessingState,
-} from '@codebuff/agent-runtime/tools/handlers/tool/write-file'
-import type { CodebuffToolHandlerFunction } from '@codebuff/agent-runtime/tools/handlers/handler-function-type'
+} from './write-file'
 import type {
   ClientToolCall,
   CodebuffToolCall,