fix: gate privacy warning on !hasCustomContent

The late-set blockSessionSave privacy warning incorrectly fired when
custom content was pre-set (transcript was never loaded or sent to LLM).
Now only warns when transcript was actually loaded — matching the
condition that guards transcript loading at line 304.

src/hooks/bundled/session-memory/handler.ts

@@ -444,14 +444,17 @@ const saveSessionToMemory: HookHandler = async (event) => {
       if (event.context.blockSessionSave === true && inlineWriteHappened) {
         // Privacy note: late-set blockSessionSave retracts the file but does NOT
         // prevent transcript content from having already been sent to the LLM
-        // provider for slug generation. To prevent transcript processing entirely,
-        // set blockSessionSave before the session-memory handler runs (pre-set path).
-        log.warn(
-          "blockSessionSave was set by a late hook — memory file will be retracted, but " +
-            "transcript content may have already been sent to the LLM provider for slug generation. " +
-            "To prevent transcript processing entirely, set blockSessionSave before the " +
-            "session-memory handler runs.",
-        );
+        // provider for slug generation — but only when the transcript was actually
+        // loaded (i.e. no custom content was pre-set). When hasCustomContent is
+        // true, transcript loading and LLM calls were skipped entirely.
+        if (!hasCustomContent) {
+          log.warn(
+            "blockSessionSave was set by a late hook — memory file will be retracted, but " +
+              "transcript content may have already been sent to the LLM provider for slug generation. " +
+              "To prevent transcript processing entirely, set blockSessionSave before the " +
+              "session-memory handler runs.",
+          );
+        }
         if (preExistingContent !== null) {
           // Slug collision: another entry already existed at this filename
           // before our inline write. Restore the original content rather