Finish eliminating remaining ANT-ONLY source labels (#360)

This extends the label-only cleanup to the remaining internal-only command,
debug, and heading strings so the source tree no longer contains ANT-ONLY
markers. The pass still avoids logic changes and only renames labels shown
in internal or gated surfaces.

Constraint: Update the existing label-cleanup PR without widening scope into behavior changes
Rejected: Leave the last ANT-ONLY strings for a later pass | low-cost cleanup while the branch is already focused on labels
Confidence: high
Scope-risk: narrow
Reversibility: clean
Directive: The next phase should move off label cleanup and onto a separately scoped logic or rebrand slice
Tested: bun run build
Tested: bun run smoke
Tested: bun run verify:privacy
Tested: bun run test:provider
Tested: bun run test:provider-recommendation
Not-tested: Full repo typecheck (upstream baseline remains noisy)

Co-authored-by: anandh8x <test@example.com>

src/utils/effort.ts

@@ -292,7 +292,7 @@ export function getEffortLevelDescription(level: EffortLevel | OpenAIEffortLevel
  */
 export function getEffortValueDescription(value: EffortValue): string {
   if (process.env.USER_TYPE === 'ant' && typeof value === 'number') {
-    return `[ANT-ONLY] Numeric effort value of ${value}`
+    return `[internal-only] Numeric effort value of ${value}`
   }
 
   if (typeof value === 'string') {

src/utils/hooks/hooksConfigManager.ts

@@ -350,7 +350,7 @@ export function groupHooksByEventAndMatcher(
               event: hookEvent,
               config: {
                 type: 'command',
-                command: '[ANT-ONLY] Built-in Hook',
+                command: '[internal-only] Built-in Hook',
               },
               matcher: matcher.matcher,
               source: 'builtinHook',