feat(capture): M11 batch capture - one bank sample per selected item / razor area

Pure batch_capture module (plan + mixed-result aggregation, unit-tested);
CAPTURE_BATCH_ITEMS/RAZOR actions with transient per-unit selection restored
on all paths, per-unit invariants + provenance, single persist.
Conform-on-insert already shipped.

CMakeLists.txt

@@ -178,6 +178,18 @@ add_library(render_settings STATIC src/render_settings.cpp)
 target_include_directories(render_settings PUBLIC src)
 target_link_libraries(render_settings PUBLIC bank_model)
 
+# ---------------------------------------------------------------------------
+# 2f'') Pure batch_capture library — NO REAPER, NO SWELL. The M11 batch-capture
+#       logic: an ordered list of source ranges (one per selected item / per razor
+#       area) -> validated, ordinal-assigned capture units (empty/inverted dropped),
+#       plus order-preserving per-unit result aggregation into a mixed-result summary
+#       line. Split out so the plan/aggregate/summary is unit-tested outside the DAW;
+#       the selection read, transient re-selection, and render loop stay in main.cpp.
+#       No dependency on bank_model — it takes plain ranges/values at its boundary.
+# ---------------------------------------------------------------------------
+add_library(batch_capture STATIC src/batch_capture.cpp)
+target_include_directories(batch_capture PUBLIC src)
+
 # ---------------------------------------------------------------------------
 # 2f') Pure tail_control library — NO REAPER, NO SWELL. The docked bank_panel's
 #      tail-mode toggle logic (T1 exposure): TailSetting state, cycle order
@@ -341,6 +353,10 @@ add_executable(render_settings_tests tests/test_render_settings.cpp)
 target_link_libraries(render_settings_tests PRIVATE render_settings)
 add_test(NAME render_settings_tests COMMAND render_settings_tests)
 
+add_executable(batch_capture_tests tests/test_batch_capture.cpp)
+target_link_libraries(batch_capture_tests PRIVATE batch_capture)
+add_test(NAME batch_capture_tests COMMAND batch_capture_tests)
+
 add_executable(tail_control_tests tests/test_tail_control.cpp)
 target_link_libraries(tail_control_tests PRIVATE tail_control)
 add_test(NAME tail_control_tests COMMAND tail_control_tests)
@@ -417,7 +433,7 @@ add_library(reaper_reasampler MODULE
     src/bank_book.cpp
     src/owned_manifest.cpp
 )
-target_link_libraries(reaper_reasampler PRIVATE bank_model capture_paths peaks bank_grid mode_switch tab_strip view_mode_model insert_plan render_settings tail_control realtime_record bank_book wav_trim owned_manifest prune_reconcile prune_button app_version provenance)
+target_link_libraries(reaper_reasampler PRIVATE bank_model capture_paths peaks bank_grid mode_switch tab_strip view_mode_model insert_plan render_settings batch_capture tail_control realtime_record bank_book wav_trim owned_manifest prune_reconcile prune_button app_version provenance)
 target_include_directories(reaper_reasampler PRIVATE ${SDK_INC} ${WDL_INC})
 # OUTPUT_NAME is channel-derived (Phase V, V4): "reaper_reasampler" (stable, default) or
 # "reaper_reasampler_beta" (beta). REAPER dlopen's any reaper_* module, so both channels'