fix: structured approvals + ToolCallGroup reactivity

- Replace text-based regex parsing in InlineApproval with structured
  pendingApprovals extracted from request_execution tool results. The tool
  result text is deterministic (not LLM-generated), making UUID extraction
  reliable regardless of how the LLM rephrases the response.

- Fix ToolCallGroup  reactivity: wasActive = active captured initial
  value. Now uses (active) so  re-runs on prop changes.

- Extract approvals in both live streaming (done event) and history loading
  for consistent behavior on resumed sessions.

web/src/lib/components/InlineApproval.svelte

@@ -1,4 +1,5 @@
 <script lang="ts">
+  import type { PendingApproval } from '$lib/stores/chat'
   import { decideApproval } from '$lib/api'
   import { Button } from '$lib/components/ui/button'
   import CheckIcon from '@lucide/svelte/icons/check'
@@ -6,62 +7,57 @@
   import ShieldCheckIcon from '@lucide/svelte/icons/shield-check'
   import LoaderCircleIcon from '@lucide/svelte/icons/loader-circle'
 
-  let { text }: { text: string } = $props()
-
-  const RE = /\bexec[uecution]*\s+([0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12})\b/i
-  const match = $derived(text.match(RE))
+  let { approvals }: { approvals: PendingApproval[] } = $props()
 
   let pending = $state(false)
-  let done = $state<'approved' | 'denied' | null>(null)
+  let done = $state<string | null>(null)
+  let doneId = $state('')
 
-  async function approve() {
-    if (!match) return
+  async function decide(approval: PendingApproval, decision: 'approve' | 'deny') {
     pending = true
-    const result = await decideApproval(match[1], 'approve')
+    doneId = approval.executionId
+    const result = await decideApproval(approval.executionId, decision)
     pending = false
-    done = result ? 'approved' : 'denied'
-  }
-
-  async function deny() {
-    if (!match) return
-    pending = true
-    const result = await decideApproval(match[1], 'deny')
-    pending = false
-    done = result ? 'denied' : 'denied'
+    done = result ? decision : 'failed'
   }
 
   $effect(() => {
     done = null
+    doneId = ''
     pending = false
-    void text
+    void approvals
   })
 </script>
 
-{#if match && !done}
-  <div class="my-2 flex items-center gap-2 rounded-lg border border-warning/40 bg-warning/5 px-3 py-2">
-    <ShieldCheckIcon class="size-4 shrink-0 text-warning" />
-    <span class="flex-1 text-xs text-muted-foreground">This action requires approval</span>
-    {#if pending}
-      <LoaderCircleIcon class="size-4 animate-spin text-muted-foreground" />
-    {:else}
-      <Button size="sm" variant="default" class="h-7 px-2.5 text-xs" onclick={approve}>
-        <CheckIcon class="size-3" />
-        <span class="ml-1">Approve</span>
-      </Button>
-      <Button size="sm" variant="outline" class="h-7 px-2.5 text-xs" onclick={deny}>
-        <XIcon class="size-3" />
-        <span class="ml-1">Deny</span>
-      </Button>
-    {/if}
-  </div>
-{:else if done}
-  <div class="my-2 flex items-center gap-2 rounded-lg border px-3 py-2 text-xs {done === 'approved' ? 'border-success/40 bg-success/5 text-success' : 'border-destructive/40 bg-destructive/5 text-destructive'}">
-    {#if done === 'approved'}
+{#each approvals.filter(a => !done || a.executionId !== doneId) as approval (approval.executionId)}
+  {#if !done || approval.executionId !== doneId}
+    <div class="my-2 flex items-center gap-2 rounded-lg border border-warning/40 bg-warning/5 px-3 py-2">
+      <ShieldCheckIcon class="size-4 shrink-0 text-warning" />
+      <span class="flex-1 text-xs text-muted-foreground">
+        {approval.action} on {approval.target} requires approval
+      </span>
+      {#if pending && doneId === approval.executionId}
+        <LoaderCircleIcon class="size-4 animate-spin text-muted-foreground" />
+      {:else}
+        <Button size="sm" variant="default" class="h-7 px-2.5 text-xs" onclick={() => decide(approval, 'approve')}>
+          <CheckIcon class="size-3" />
+          <span class="ml-1">Approve</span>
+        </Button>
+        <Button size="sm" variant="outline" class="h-7 px-2.5 text-xs" onclick={() => decide(approval, 'deny')}>
+          <XIcon class="size-3" />
+          <span class="ml-1">Deny</span>
+        </Button>
+      {/if}
+    </div>
+  {:else if done === 'approved'}
+    <div class="my-2 flex items-center gap-2 rounded-lg border border-success/40 bg-success/5 px-3 py-2 text-xs text-success">
       <CheckIcon class="size-4" />
       <span>Approved. The action is running.</span>
-    {:else}
+    </div>
+  {:else}
+    <div class="my-2 flex items-center gap-2 rounded-lg border border-destructive/40 bg-destructive/5 px-3 py-2 text-xs text-destructive">
       <XIcon class="size-4" />
       <span>Denied.</span>
-    {/if}
-  </div>
-{/if}
+    </div>
+  {/if}
+{/each}