fix(ai): harden validation and db handle reuse

packages/http-routes/src/routes/web/ai-filter.ts

@@ -18,11 +18,7 @@ export function registerAiFilterRoutes(server: FastifyInstance, ctx: HttpRouteCo
     const db = ctx.dbManager.open(sessionId)
     if (!db) return reply.code(404).send({ error: `Session not found: ${sessionId}` })
 
-    try {
     return filterMessagesWithContext(db, { keywords, timeFilter, senderIds, contextSize, page, pageSize })
-    } finally {
-      db.close()
-    }
   })
 
   server.post<{
@@ -37,10 +33,6 @@ export function registerAiFilterRoutes(server: FastifyInstance, ctx: HttpRouteCo
     const db = ctx.dbManager.open(sessionId)
     if (!db) return reply.code(404).send({ error: `Session not found: ${sessionId}` })
 
-    try {
     return getMultipleSessionsMessages(db, chatSessionIds, page, pageSize)
-    } finally {
-      db.close()
-    }
   })
 }

packages/http-routes/src/routes/web/ai-tools.ts

@@ -82,11 +82,6 @@ export function registerAiToolRoutes(server: FastifyInstance, ctx: HttpRouteCont
       return { success: false, error: String(error) }
     } finally {
       activeToolTests.delete(testId)
-      try {
-        db.close()
-      } catch {
-        /* ignore close errors */
-      }
     }
   })
 

src/components/common/Settings/AI/useAIConfigForm.ts

@@ -357,8 +357,7 @@ export function useAIConfigForm(props: {
   const canFetchModels = computed(() => {
     if (effectiveApiFormat.value === 'anthropic-messages') return false
     const baseUrl = formData.value.baseUrl || currentProviderDef.value?.defaultBaseUrl || ''
-    const hasKey =
-      formData.value.apiKey.trim() || isLocalMode.value || canReuseStoredKey.value
+    const hasKey = formData.value.apiKey.trim() || isLocalMode.value || canReuseStoredKey.value
     return !!(baseUrl.trim() && hasKey)
   })
 
@@ -569,7 +568,8 @@ export function useAIConfigForm(props: {
   // ============ 验证 ============
 
   async function validateKey() {
-    const { provider, apiKey, baseUrl } = formData.value
+    const { provider, baseUrl } = formData.value
+    const apiKey = formData.value.apiKey.trim()
     const canReuse = canReuseStoredKey.value
 
     if (!isPresetMode.value) {
@@ -589,7 +589,7 @@ export function useAIConfigForm(props: {
     const configId = !apiKey && canReuse ? props.config.value?.id : undefined
 
     try {
-      const testApiKey = apiKey || 'sk-no-key-required'
+      const testApiKey = !apiKey && canReuse ? '' : apiKey || 'sk-no-key-required'
       const result = await useLLMService().validateApiKey(
         provider || 'openai-compatible',
         testApiKey,