Refine travel reimbursement steward flow

Align planner, runtime rules, and policy assets so travel guidance
matches the updated reimbursement workflow.

web/src/views/scripts/useStewardPlanFlow.js

@@ -4,17 +4,18 @@ import {
   buildStewardSuggestedActions,
   normalizeStewardPlan
 } from './stewardPlanModel.js'
-import { resolveStewardTypewriterNextIndex } from './stewardTypewriter.js'
 import { SESSION_TYPE_STEWARD } from './travelReimbursementConversationModel.js'
 
 const STEWARD_TYPEWRITER_INTERVAL_MS = 10
 const STEWARD_THINKING_TYPEWRITER_INTERVAL_MS = 8
+const STEWARD_TYPEWRITER_CHUNK_SIZE = 4
 const STEWARD_THINKING_TYPEWRITER_CHUNK_SIZE = 5
 
 export function useStewardPlanFlow({
   activeSessionType,
   attachedFiles,
   composerDraft,
+  conversationId,
   currentUser,
   fileInputRef,
   messages,
@@ -30,6 +31,7 @@ export function useStewardPlanFlow({
   submitting,
   reviewActionBusy,
   sessionSwitchBusy,
+  stewardState,
   toast
 }) {
   const stewardTypewriterTimers = new Map()
@@ -108,9 +110,19 @@ export function useStewardPlanFlow({
       const requestPayload = buildStewardPlanRequest({
         rawText,
         files,
-        currentUser: currentUser.value || {}
+        currentUser: currentUser.value || {},
+        conversationId: conversationId?.value || '',
+        stewardState: stewardState?.value || null
       })
       const plan = await fetchPlanWithStreaming(pendingMessage.id, requestPayload, streamRunId)
+      const nextConversationId = String(plan?.conversation_id || plan?.conversationId || '').trim()
+      if (nextConversationId && conversationId) {
+        conversationId.value = nextConversationId
+      }
+      const nextStewardState = plan?.steward_state || plan?.stewardState || null
+      if (nextStewardState && typeof nextStewardState === 'object' && stewardState) {
+        stewardState.value = nextStewardState
+      }
       await waitForStewardThinkingQueue(streamRunId)
       const typedThinkingEvents = resolveStewardThinkingEvents(pendingMessage.id)
       const normalizedPlan = normalizeStewardPlan(plan, {
@@ -176,7 +188,7 @@ export function useStewardPlanFlow({
       if (runId !== stewardTypewriterRunId) {
         return
       }
-      index = resolveStewardTypewriterNextIndex(chars, index)
+      index = Math.min(total, index + STEWARD_TYPEWRITER_CHUNK_SIZE)
       const message = messages.value.find((item) => item.id === messageId)
       if (!message) {
         return
@@ -188,7 +200,9 @@ export function useStewardPlanFlow({
         ...normalizedPlan,
         streamStatus: 'typing'
       }
-      nextTick(scrollToBottom)
+      if (index % 4 === 0 || index === total) {
+        nextTick(scrollToBottom)
+      }
     }
 
     const message = messages.value.find((item) => item.id === messageId)