Phase 4 구현: Ollama LLM 연동 (다듬기, 번역, 스트리밍)

- LocalLLMService: Ollama REST API, 스트리밍 NDJSON 파싱, 5초 가용성 폴링
- 시스템 프롬프트: refine/translate/summarize/grammar/expand/custom 6개 액션
- VoiceModeService: 전사→LLM 후처리→텍스트 삽입, LLM 실패 시 원본 폴백
- LLM IPC 핸들러: status/models/process/cancel/serverUrl 8개
- StatusBar: Ollama 연결 상태 + 활성 모델 표시
- Preload: llm API 섹션 추가
- Bootstrap: llm-polling 초기화 단계 추가

src/main/ipc/llm-handlers.ts

@@ -0,0 +1,68 @@
+// src/main/ipc/llm-handlers.ts
+
+import { ipcMain } from 'electron'
+import { IPC_CHANNELS } from '@shared/ipc-channels'
+import { ipcSuccess, ipcError, ErrorCode } from '@shared/errors'
+import { getLocalLLMService } from '../services/LocalLLMService'
+import { configGet, configSet } from '../services/ConfigService'
+import type { SetLLMModelParams, SetServerUrlParams, LLMProcessParams } from '@shared/types'
+
+export function registerLLMHandlers(): void {
+  ipcMain.handle(IPC_CHANNELS.LLM.GET_STATUS, async () => {
+    return ipcSuccess(getLocalLLMService().getStatus())
+  })
+
+  ipcMain.handle(IPC_CHANNELS.LLM.GET_MODELS, async () => {
+    try {
+      const models = await getLocalLLMService().getModels()
+      return ipcSuccess(models)
+    } catch {
+      return ipcError(ErrorCode.LLMServerUnreachable, 'Failed to get models')
+    }
+  })
+
+  ipcMain.handle(IPC_CHANNELS.LLM.GET_ACTIVE_MODEL, async () => {
+    return ipcSuccess(configGet('llmModelId'))
+  })
+
+  ipcMain.handle(IPC_CHANNELS.LLM.SET_MODEL, async (_event, params: SetLLMModelParams) => {
+    configSet('llmModelId', params.modelId)
+    return ipcSuccess(undefined)
+  })
+
+  ipcMain.handle(IPC_CHANNELS.LLM.PROCESS, async (_event, params: LLMProcessParams) => {
+    try {
+      const llm = getLocalLLMService()
+      const start = performance.now()
+      const processedText = await llm.processText(
+        params.text,
+        params.action,
+        params.targetLanguage,
+        params.customPrompt
+      )
+      return ipcSuccess({
+        originalText: params.text,
+        processedText,
+        action: params.action,
+        processingTimeMs: Math.round(performance.now() - start),
+        tokenCount: 0
+      })
+    } catch {
+      return ipcError(ErrorCode.LLMProcessingFailed, 'LLM processing failed')
+    }
+  })
+
+  ipcMain.handle(IPC_CHANNELS.LLM.CANCEL_PROCESS, async () => {
+    getLocalLLMService().cancelGeneration()
+    return ipcSuccess(undefined)
+  })
+
+  ipcMain.handle(IPC_CHANNELS.LLM.GET_SERVER_URL, async () => {
+    return ipcSuccess(configGet('ollamaServerUrl'))
+  })
+
+  ipcMain.handle(IPC_CHANNELS.LLM.SET_SERVER_URL, async (_event, params: SetServerUrlParams) => {
+    configSet('ollamaServerUrl', params.url)
+    return ipcSuccess(undefined)
+  })
+}