Address code review feedback - extract shared constants

Co-authored-by: johndoe6345789 <224850594+johndoe6345789@users.noreply.github.com>

src/lib/db-constants.ts

@@ -0,0 +1,8 @@
+/**
+ * Database constants shared across modules
+ */
+
+export const DB_KEY = 'codesnippet-db'
+export const IDB_NAME = 'CodeSnippetDB'
+export const IDB_STORE = 'database'
+export const IDB_VERSION = 1

src/lib/db-core.ts

@@ -7,6 +7,7 @@ import { loadFromIndexedDB, saveToIndexedDB, openIndexedDB, deleteFromIndexedDB
 import { loadFromLocalStorage, saveToLocalStorage, deleteFromLocalStorage } from './db-localstorage'
 import { validateSchema, createTables } from './db-schema'
 import { getStorageConfig, FlaskStorageAdapter, loadStorageConfig } from './storage'
+import { DB_KEY } from './db-constants'
 
 let dbInstance: Database | null = null
 let sqlInstance: any = null
@@ -151,7 +152,8 @@ export async function getDatabaseStats(): Promise<{
   const databaseSize = data.length
   
   const hasIDB = await openIndexedDB()
-  const storageType = hasIDB ? 'indexeddb' : (loadFromLocalStorage() ? 'localstorage' : 'none')
+  const hasLocalStorage = typeof localStorage !== 'undefined' && localStorage.getItem(DB_KEY) !== null
+  const storageType = hasIDB ? 'indexeddb' : (hasLocalStorage ? 'localstorage' : 'none')
   
   return {
     snippetCount,

src/lib/db-indexeddb.ts

@@ -2,10 +2,7 @@
  * IndexedDB operations for database persistence
  */
 
-const DB_KEY = 'codesnippet-db'
-const IDB_NAME = 'CodeSnippetDB'
-const IDB_STORE = 'database'
-const IDB_VERSION = 1
+import { DB_KEY, IDB_NAME, IDB_STORE, IDB_VERSION } from './db-constants'
 
 export async function openIndexedDB(): Promise<IDBDatabase | null> {
   if (typeof indexedDB === 'undefined') return null
@@ -101,5 +98,3 @@ export async function deleteFromIndexedDB(): Promise<void> {
     }
   })
 }
-
-export { DB_KEY }

src/lib/db-localstorage.ts

@@ -2,7 +2,7 @@
  * LocalStorage operations for database persistence
  */
 
-import { DB_KEY } from './db-indexeddb'
+import { DB_KEY } from './db-constants'
 
 export function loadFromLocalStorage(): Uint8Array | null {
   try {