Reduce internal-only labeling noise in source comments (#355)

This pass rewrites comment-only ANT-ONLY markers to neutral internal-only
language across the source tree without changing runtime strings, flags,
commands, or protocol identifiers. The goal is to lower obvious internal
prose leakage while keeping the diff mechanically safe and easy to review.

Constraint: Phase B is limited to comments/prose only; runtime strings and user-facing labels remain deferred
Rejected: Broad search-and-replace across strings and command descriptions | too risky for a prose-only pass
Confidence: high
Scope-risk: narrow
Reversibility: clean
Directive: Remaining ANT-ONLY hits are mostly runtime/user-facing strings and should be handled separately from comment cleanup
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/tools/AgentTool/AgentTool.tsx

@@ -430,7 +430,7 @@ export const AgentTool = buildTool({
     // Resolve effective isolation mode (explicit param overrides agent def)
     const effectiveIsolation = isolation ?? selectedAgent.isolation;
 
-    // Remote isolation: delegate to CCR. Gated ant-only — the guard enables
+    // Remote isolation: delegate to CCR. Gated internal-only — the guard enables
     // dead code elimination of the entire block for external builds.
     if ("external" === 'ant' && effectiveIsolation === 'remote') {
       const eligibility = await checkRemoteAgentEligibility();