Extract Insta pair row creation

docs/prompt-architecture-improvement-plan.md

@@ -144,17 +144,18 @@ Owner today: `build_insta_of_pair`.
 
 Keep here:
 
-- soft/hard row creation;
 - continuity policy;
 - softcore cast policy;
 
 Improve later:
 
-- split pair assembly into small functions by phase:
-  `build_soft_row`, `build_hard_row`.
+- split remaining pair cast/descriptor policy out of `build_insta_of_pair`.
 
 Already isolated:
 
+- soft/hard row creation lives in `pair_rows.py`, including softcore expression
+  override resolution, Woman A slot context application, soft outfit/pose
+  overrides, POV row fields, and hardcore row creation.
 - pair-level camera routing lives in `pair_camera.py`, including soft/hard
   camera config selection, same-as-softcore mode, camera-detail override,
   same-room hard scene continuity, camera-aware composition mutation, POV camera

docs/prompt-pool-routing-map.md

@@ -65,6 +65,7 @@ Core helper ownership:
 | Python module | What it owns |
 | --- | --- |
 | `category_library.py` | JSON category loading, subcategory normalization, named scene/expression/composition pool loading, cast compatibility filtering, exact subcategory lookup, and inheritance-based pool merging. |
+| `pair_rows.py` | Insta/OF soft/hard row creation, softcore expression override resolution, Woman A slot context application, soft outfit/pose overrides, and POV row fields. |
 | `pair_camera.py` | Insta/OF soft/hard camera route resolution, same-as-softcore camera mode, camera-detail override, camera-aware composition mutation, POV camera suppression, and synchronized row/root camera metadata. |
 | `pair_clothing.py` | Insta/OF hardcore clothing continuity, action-aware body-access flags, conflicting outfit-piece cleanup, default visible-men clothing, and final root clothing-state assembly. |
 | `pair_output.py` | Insta/OF final pair prompts, trigger preservation, negative prompts, captions, and root pair metadata assembly. |