feat(pilot): frontend API client — patchScript + inline createSession

sessionSuggestedFixesApi.patchScript(sessionId, fixId, script, params?)
hits the new PATCH /script endpoint.

scriptBuilder.createSession accepts an optional options bag with
origin + aiSessionId, defaulting to standalone when omitted so legacy
callers stay behavior-preserving.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

frontend/src/api/scriptBuilder.ts

@@ -7,9 +7,21 @@ import type {
 } from '@/types'
 import type { ScriptTemplateDetail } from '@/types'
 
+export interface CreateSessionOptions {
+  origin?: 'standalone' | 'pilot_inline'
+  aiSessionId?: string
+}
+
 export const scriptBuilderApi = {
-  async createSession(language: string): Promise<ScriptBuilderSessionDetail> {
-    const { data } = await apiClient.post('/scripts/builder/sessions', { language })
+  async createSession(
+    language: string,
+    options?: CreateSessionOptions,
+  ): Promise<ScriptBuilderSessionDetail> {
+    const { data } = await apiClient.post('/scripts/builder/sessions', {
+      language,
+      origin: options?.origin,
+      ai_session_id: options?.aiSessionId,
+    })
     return data
   },