chore(pilot): remove deprecated SuggestedFix task-lane card

Superseded by ProposalBanner (Phase 8). The import was already removed
from AssistantChatPage in the previous commit; this deletes the orphaned
file itself and strips the now-unused suggestedFixSlot prop from
TaskLane's interface and both call sites.

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

frontend/src/components/assistant/TaskLane.tsx

@@ -43,8 +43,6 @@ interface TaskLaneProps {
   // shape lets the parent own fact-fetching and state-version polling without
   // pulling that concern into TaskLane.
   whatWeKnowSlot?: React.ReactNode
-  // Phase 3: Suggested fix card, rendered below Diagnostic Checks.
-  suggestedFixSlot?: React.ReactNode
   // Phase 3: bottom-of-lane slot for the Resolve action bar + preview popover
   // (parent owns state). Renders inside the scrollable body so the popover
   // stays anchored as the lane scrolls.
@@ -79,7 +77,7 @@ export function clearTaskState(sessionId: string) {
 
 // ── Component ──
 
-export function TaskLane({ questions, actions, sessionId, onSubmit, onClose, loading, whatWeKnowSlot, suggestedFixSlot, bottomSlot, variant = 'side' }: TaskLaneProps) {
+export function TaskLane({ questions, actions, sessionId, onSubmit, onClose, loading, whatWeKnowSlot, bottomSlot, variant = 'side' }: TaskLaneProps) {
   const isDrawer = variant === 'drawer'
   const [tasks, setTasks] = useState<TaskResponse[]>(() => {
     // Try to restore saved state for this session (preserves user's in-progress answers)
@@ -535,15 +533,11 @@ export function TaskLane({ questions, actions, sessionId, onSubmit, onClose, loa
           </section>
         )}
 
-        {/* ── Suggested fix (Phase 3) ── */}
-        {suggestedFixSlot}
-
         {/* Quiet-state hint: lane is open (facts exist), but AI hasn't
             proposed a next step yet. Keeps the lane from feeling "finished"
             when the engineer still expects a question / fix to arrive. */}
         {questionTasks.length === 0
           && actionTasks.length === 0
-          && !suggestedFixSlot
           && !loading && (
           <div className="text-[0.6875rem] italic text-muted-foreground px-1 py-2">
             No open questions — send a message or add a note; the AI will follow up.

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

@@ -1,97 +0,0 @@
-/**
- * SuggestedFix card — Phase 3 task-lane section.
- *
- * Renders the active AI-proposed resolution path for the session
- * (per FLOWPILOT-MIGRATION.md Section 3.1, "Suggested fix"). Amber-accented
- * to match the mockup; clicking opens the Script Generator flow in Phase 5.
- *
- * For Phase 3, the card is informational + a Dismiss action. The three-option
- * dialog (one_off / draft_template / build_template) is wired in Phase 5
- * via a separate component.
- */
-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 } {
-  if (pct >= 80) return { label: 'high', tone: 'text-success' }
-  if (pct >= 50) return { label: 'medium', tone: 'text-warning' }
-  return { label: 'low', tone: 'text-muted-foreground' }
-}
-
-export function SuggestedFix({ fix, onDismiss, onActivate, panelOpen }: SuggestedFixProps) {
-  const [busy, setBusy] = useState(false)
-  const conf = confidenceBucket(fix.confidence_pct)
-
-  const handleDismiss = async (e: React.MouseEvent) => {
-    e.stopPropagation()  // don't trigger the card-body activation
-    setBusy(true)
-    try { await onDismiss() } finally { setBusy(false) }
-  }
-
-  return (
-    <section>
-      <div className="pb-2">
-        <div className="flex items-center gap-2 text-[10px] font-semibold uppercase tracking-[1.2px] text-muted-foreground pl-0.5">
-          <span className="w-1.5 h-1.5 rounded-full bg-warning" />
-          Suggested fix
-          <span className="text-muted-foreground">·</span>
-          <span className={`tabular-nums ${conf.tone}`}>{fix.confidence_pct}% confidence</span>
-        </div>
-      </div>
-
-      <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">
-            <div className="text-[0.8125rem] font-medium text-heading leading-snug">
-              {fix.title}
-            </div>
-            <div className="mt-1 text-[0.75rem] text-muted-foreground leading-relaxed">
-              {fix.description}
-            </div>
-            {fix.script_template_id && (
-              <div className="mt-1.5 text-[0.6875rem] text-success">
-                ✓ 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 — click to review options
-              </div>
-            )}
-          </div>
-          <button
-            onClick={handleDismiss}
-            disabled={busy}
-            className="p-1 rounded text-muted-foreground hover:text-danger hover:bg-elevated/40 transition-colors"
-            title="Dismiss this suggestion"
-          >
-            <X size={11} />
-          </button>
-        </div>
-      </div>
-    </section>
-  )
-}
-
-export default SuggestedFix

frontend/src/pages/AssistantChatPage.tsx

@@ -1614,7 +1614,6 @@ export default function AssistantChatPage() {
                     loading={loading}
                   />
                 }
-                suggestedFixSlot={null}
                 bottomSlot={
                   <>
                     {scriptPanelOpen && activeFix && activeChatId && (
@@ -1694,7 +1693,6 @@ export default function AssistantChatPage() {
               loading={loading}
             />
           }
-          suggestedFixSlot={null}
           bottomSlot={
             <>
               {scriptPanelOpen && activeFix && activeChatId && (