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/components/PromptInput/PromptInput.tsx

@@ -293,7 +293,7 @@ function PromptInput({
   // the pill returns null for implicit-and-not-reconnecting, so nav must too,
   // otherwise bridge becomes an invisible selection stop.
   const bridgeFooterVisible = replBridgeConnected && (replBridgeExplicit || replBridgeReconnecting);
-  // Tmux pill (ant-only) — visible when there's an active tungsten session
+  // Tmux pill (internal-only) — visible when there's an active tungsten session
   const hasTungstenSession = useAppState(s => "external" === 'ant' && s.tungstenActiveSession !== undefined);
   const tmuxFooterVisible = "external" === 'ant' && hasTungstenSession;
   // WebBrowser pill — visible when a browser is open
@@ -2153,7 +2153,7 @@ function PromptInput({
     }} onCancel={() => setShowHistoryPicker(false)} />;
   }
 
-  // Show loop mode menu when requested (ant-only, eliminated from external builds)
+  // Show loop mode menu when requested (internal-only, eliminated from external builds)
   if (modelPickerElement) {
     return modelPickerElement;
   }