refactor(hooks): remove dead hook files

Delete 3 unused hook files:

- hashline-edit-diff-enhancer/index.ts (and test file)

- session-recovery/recover-empty-content-message.ts

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-opencode)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

src/hooks/session-recovery/recover-empty-content-message.ts

@@ -1,87 +0,0 @@
-import type { createOpencodeClient } from "@opencode-ai/sdk"
-import type { MessageData } from "./types"
-import { extractMessageIndex } from "./detect-error-type"
-import { recoverEmptyContentMessageFromSDK } from "./recover-empty-content-message-sdk"
-import {
-  findEmptyMessageByIndex,
-  findEmptyMessages,
-  findMessagesWithEmptyTextParts,
-  findMessagesWithThinkingOnly,
-  injectTextPart,
-  replaceEmptyTextParts,
-} from "./storage"
-import { isSqliteBackend } from "../../shared/opencode-storage-detection"
-import { replaceEmptyTextPartsAsync, findMessagesWithEmptyTextPartsFromSDK } from "./storage/empty-text"
-import { injectTextPartAsync } from "./storage/text-part-injector"
-
-type Client = ReturnType<typeof createOpencodeClient>
-
-const PLACEHOLDER_TEXT = "[user interrupted]"
-
-export async function recoverEmptyContentMessage(
-  client: Client,
-  sessionID: string,
-  failedAssistantMsg: MessageData,
-  _directory: string,
-  error: unknown
-): Promise<boolean> {
-  if (isSqliteBackend()) {
-    return recoverEmptyContentMessageFromSDK(client, sessionID, failedAssistantMsg, error, {
-      placeholderText: PLACEHOLDER_TEXT,
-      replaceEmptyTextPartsAsync,
-      injectTextPartAsync,
-      findMessagesWithEmptyTextPartsFromSDK,
-    })
-  }
-
-  const targetIndex = extractMessageIndex(error)
-  const failedID = failedAssistantMsg.info?.id
-  let anySuccess = false
-
-  const messagesWithEmptyText = findMessagesWithEmptyTextParts(sessionID)
-  for (const messageID of messagesWithEmptyText) {
-    if (replaceEmptyTextParts(messageID, PLACEHOLDER_TEXT)) {
-      anySuccess = true
-    }
-  }
-
-  const thinkingOnlyIDs = findMessagesWithThinkingOnly(sessionID)
-  for (const messageID of thinkingOnlyIDs) {
-    if (injectTextPart(sessionID, messageID, PLACEHOLDER_TEXT)) {
-      anySuccess = true
-    }
-  }
-
-  if (targetIndex !== null) {
-    const targetMessageID = findEmptyMessageByIndex(sessionID, targetIndex)
-    if (targetMessageID) {
-      if (replaceEmptyTextParts(targetMessageID, PLACEHOLDER_TEXT)) {
-        return true
-      }
-      if (injectTextPart(sessionID, targetMessageID, PLACEHOLDER_TEXT)) {
-        return true
-      }
-    }
-  }
-
-  if (failedID) {
-    if (replaceEmptyTextParts(failedID, PLACEHOLDER_TEXT)) {
-      return true
-    }
-    if (injectTextPart(sessionID, failedID, PLACEHOLDER_TEXT)) {
-      return true
-    }
-  }
-
-  const emptyMessageIDs = findEmptyMessages(sessionID)
-  for (const messageID of emptyMessageIDs) {
-    if (replaceEmptyTextParts(messageID, PLACEHOLDER_TEXT)) {
-      anySuccess = true
-    }
-    if (injectTextPart(sessionID, messageID, PLACEHOLDER_TEXT)) {
-      anySuccess = true
-    }
-  }
-
-  return anySuccess
-}