feat(pilot): Phase 5 — inline Script Generator integration

Wires the SuggestedFix card to an inline panel that handles both cases:
template-matched fixes open the Script Library generator with parameters
pre-filled from session context; un-matched fixes open the three-option
dialog (one_off / draft_template / build_template). The decision endpoint
records the path choice with side effects: draft_template persists a
draft_templates row via a Sonnet-driven TemplateExtractionService;
build_template returns a redirect to the Script Builder; one_off just
records the choice.

Backend:
- TemplateExtractionService: drafts a parameter schema from a concrete
  rendered script. Conservative by default ("prefer fewer parameters").
  Round-trip-validates that templated_body only references declared
  parameters; missing-key mismatch falls back to the original script
  with no params. LLM/parse failures fall back identically — the
  engineer can still create a draft and refine in the post-resolve
  prompt (Phase 6).
- /suggested-fixes/{fix_id}/decision side effects:
  * one_off → returns rendered_script (engineer's edited version or the
    fix's ai_drafted_script verbatim)
  * draft_template → same + creates draft_templates row with extracted
    params, returns draft_template_id
  * build_template → returns redirect_path=/scripts/builder?from_session=
    &fix= so the frontend can navigate to the builder pre-loaded
- 400 when a non-template fix has no ai_drafted_script (template-matched
  fixes take the dedicated /scripts/generate path, not this endpoint).
- 12 tests: TemplateExtractionService parse + fallback paths, all four
  decision branches, edited_script override, missing-script 400.

Frontend:
- src/components/pilot/script/{TemplateMatchPanel, NoTemplateDialog,
  ParameterizationPreview}.tsx — inline panels rendered in the task
  lane's bottom slot when the engineer clicks a SuggestedFix card.
- TemplateMatchPanel: loads template via /scripts/templates/{id},
  pre-fills params from fix.ai_drafted_parameters with cyan "from
  session" tags, generates via existing /scripts/generate (already
  bumps state_version on ai_session_id from Phase 3). 404 falls back
  with a clear message instead of erroring.
- NoTemplateDialog: shows the AI-drafted script with proposed parameter
  values highlighted in amber via ParameterizationPreview; three option
  cards with the middle (draft_template) flagged Recommended; inline
  edit on the script body before deciding.
- SuggestedFix card now clickable: onActivate toggles the inline panel.
- AssistantChatPage: scriptPanelOpen state + handleScriptDecision that
  navigates on build_template and toasts on the other paths. Active fix
  changes auto-close the panel so engineers don't act on stale state.
- Cmd+K → "Open inline Script Generator" palette entry surfaces only on
  /pilot/:id routes; fires a window event the chat page subscribes to.
  No Resolve shortcut added per Section 14 decision (browser ⌘R conflict).

Verified 2026-04-22 against the dev stack:
- one_off / draft_template / build_template all return the right shape
  with real Sonnet TemplateExtractionService for the draft path.
- Conservative extraction confirmed: cmdkey + Restart-Process script
  yielded zero proposed parameters as intended.

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

frontend/src/components/pilot/sections/SuggestedFix.tsx

@@ -11,11 +11,18 @@
  */
 import { useState } from 'react'
 import { Sparkles, X } from 'lucide-react'
+import { cn } from '@/lib/utils'
 import type { SessionSuggestedFix } from '@/api/sessionSuggestedFixes'
 
 interface SuggestedFixProps {
   fix: SessionSuggestedFix
   onDismiss: () => Promise<void> | void
+  // Phase 5: clicking the card body opens the inline Script Generator panel
+  // (TemplateMatchPanel for template-matched fixes, NoTemplateDialog otherwise).
+  onActivate?: () => void
+  // Whether the script panel is currently open for THIS fix — controls the
+  // "Open" / "Close" affordance label on the card.
+  panelOpen?: boolean
 }
 
 function confidenceBucket(pct: number): { label: string; tone: string } {
@@ -24,11 +31,12 @@ function confidenceBucket(pct: number): { label: string; tone: string } {
   return { label: 'low', tone: 'text-muted-foreground' }
 }
 
-export function SuggestedFix({ fix, onDismiss }: SuggestedFixProps) {
+export function SuggestedFix({ fix, onDismiss, onActivate, panelOpen }: SuggestedFixProps) {
   const [busy, setBusy] = useState(false)
   const conf = confidenceBucket(fix.confidence_pct)
 
-  const handleDismiss = async () => {
+  const handleDismiss = async (e: React.MouseEvent) => {
+    e.stopPropagation()  // don't trigger the card-body activation
     setBusy(true)
     try { await onDismiss() } finally { setBusy(false) }
   }
@@ -44,7 +52,14 @@ export function SuggestedFix({ fix, onDismiss }: SuggestedFixProps) {
         </div>
       </div>
 
-      <div className="rounded-lg border-l-[3px] border-l-warning border border-warning/25 bg-warning-dim/15 p-3 mb-2">
+      <div
+        onClick={onActivate}
+        className={cn(
+          'rounded-lg border-l-[3px] border-l-warning border border-warning/25 bg-warning-dim/15 p-3 mb-2 transition-colors',
+          onActivate && 'cursor-pointer hover:border-warning/50 hover:bg-warning-dim/25',
+          panelOpen && 'border-warning/60 bg-warning-dim/30',
+        )}
+      >
         <div className="flex items-start gap-2">
           <Sparkles size={14} className="text-warning shrink-0 mt-0.5" />
           <div className="min-w-0 flex-1">
@@ -56,12 +71,12 @@ export function SuggestedFix({ fix, onDismiss }: SuggestedFixProps) {
             </div>
             {fix.script_template_id && (
               <div className="mt-1.5 text-[0.6875rem] text-success">
-                ✓ Matches an existing Script Library template
+                ✓ Matches an existing Script Library template — click to use
               </div>
             )}
             {!fix.script_template_id && fix.ai_drafted_script && (
               <div className="mt-1.5 text-[0.6875rem] text-accent-text">
-                Custom script drafted (no template match)
+                Custom script drafted — click to review options
               </div>
             )}
           </div>