fix: resolve publish blockers for v3.7.4→v3.8.0 release

- Fix #1991 crash: optional chaining for task-history sessionID access
- Fix #1992 think-mode: add antigravity entries to HIGH_VARIANT_MAP
- Fix #1949 Copilot premium misattribution: use createInternalAgentTextPart
- Fix #1982 load_skills: pass directory to discoverSkills for project-level skills
- Fix command priority: sort scopePriority before .find(), project-first return
- Fix Google provider transform: apply in userFallbackModels path
- Fix ralph-loop TUI: optional chaining for event handler
- Fix runtime-fallback: unify dual fallback engines, remove HTTP 400 from retry,
  fix pendingFallbackModel stuck state, add priority gate to skip model-fallback
  when runtime-fallback is active
- Fix Prometheus task system: exempt from todowrite/todoread deny
- Fix background_output: default full_session to true
- Remove orphan hooks: hashline-edit-diff-enhancer (redundant with hashline_edit
  built-in diff), task-reminder (dead code)
- Remove orphan config entries: 3 stale hook names from Zod schema
- Fix disabled_hooks schema: accept arbitrary strings for forward compatibility
- Register json-error-recovery hook in tool-guard pipeline
- Add disabled_hooks gating for question-label-truncator, task-resume-info,
  claude-code-hooks
- Update test expectations to match new behavior

src/plugin/hooks/create-session-hooks.ts

@@ -56,8 +56,8 @@ export type SessionHooks = {
   sisyphusJuniorNotepad: ReturnType<typeof createSisyphusJuniorNotepadHook> | null
   noSisyphusGpt: ReturnType<typeof createNoSisyphusGptHook> | null
   noHephaestusNonGpt: ReturnType<typeof createNoHephaestusNonGptHook> | null
-  questionLabelTruncator: ReturnType<typeof createQuestionLabelTruncatorHook>
-  taskResumeInfo: ReturnType<typeof createTaskResumeInfoHook>
+  questionLabelTruncator: ReturnType<typeof createQuestionLabelTruncatorHook> | null
+  taskResumeInfo: ReturnType<typeof createTaskResumeInfoHook> | null
   anthropicEffort: ReturnType<typeof createAnthropicEffortHook> | null
   runtimeFallback: ReturnType<typeof createRuntimeFallbackHook> | null
 }
@@ -234,8 +234,12 @@ export function createSessionHooks(args: {
     ? safeHook("no-hephaestus-non-gpt", () => createNoHephaestusNonGptHook(ctx))
     : null
 
-  const questionLabelTruncator = createQuestionLabelTruncatorHook()
-  const taskResumeInfo = createTaskResumeInfoHook()
+  const questionLabelTruncator = isHookEnabled("question-label-truncator")
+    ? safeHook("question-label-truncator", () => createQuestionLabelTruncatorHook())
+    : null
+  const taskResumeInfo = isHookEnabled("task-resume-info")
+    ? safeHook("task-resume-info", () => createTaskResumeInfoHook())
+    : null
 
   const anthropicEffort = isHookEnabled("anthropic-effort")
     ? safeHook("anthropic-effort", () => createAnthropicEffortHook())