diff --git a/CHANGELOG.md b/CHANGELOG.md
index dd4d27e6..543cfd9a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -15,6 +15,7 @@
 - At tile `512`, overlap `64`, threshold `0.15` and QA match IoU `0.25`, seven persisted AOIs reached mean precision `0.5898`, recall `0.5770`, F1 `0.5825` and minimum F1 `0.5528`; all three pure-empty controls remained at zero detections.
 - Fixed-reference evidence reduced false negatives from 7,753 to 6,182, including 745 fewer 25-100 m2 misses and 181 fewer sub-25 m2 misses. Precision is lower, so the UI states the increased false-positive review load explicitly.
 - Added persistent false-negative area summaries/GeoJSON, explicit tile-corpus sample selection provenance, missing runtime evaluation scripts, Docker COPY-source regression checks and warning-free Pydantic model-field schemas.
+- Fixed ultrawide two-panel workspaces so AI Labs, QA/QC and Exports use the available main width instead of leaving empty third/fourth columns, and decoupled backend README edits from the expensive all-in-one GIS/AI dependency cache layer.
 - Guarded activation updated only the Tower AI/model environment values; no fake outputs, provider fetching, API contract or database migration changed.
 
 ## Sprint 173 Expanded building model promotion (2026-07-13)
diff --git a/backend/tests/test_docker_runtime_config.py b/backend/tests/test_docker_runtime_config.py
index 7206ecac..9160648d 100644
--- a/backend/tests/test_docker_runtime_config.py
+++ b/backend/tests/test_docker_runtime_config.py
@@ -46,6 +46,9 @@ def test_all_in_one_dockerfile_can_opt_into_ai_dependencies_without_base_install
     dockerfile = (ROOT / "deploy" / "unraid" / "Dockerfile.all-in-one").read_text(encoding="utf-8")
 
     assert "ARG GEOINTEL_INSTALL_AI=false" in dockerfile
+    assert "COPY backend/pyproject.toml /app/" in dockerfile
+    assert "COPY backend/pyproject.toml backend/README.md /app/" not in dockerfile
+    assert "GeoIntel backend package metadata" in dockerfile
     assert 'extras=".[gis]"' in dockerfile
     assert 'extras=".[gis,ai]"' in dockerfile
     assert "python scripts/gis_import_smoke.py" in dockerfile
@@ -90,7 +93,7 @@ def test_all_in_one_dockerfile_copies_operator_scripts_for_runtime_use() -> None
 def test_all_in_one_dockerfile_copies_operator_scripts_after_dependency_install() -> None:
     dockerfile = (ROOT / "deploy" / "unraid" / "Dockerfile.all-in-one").read_text(encoding="utf-8")
 
-    dependency_install_index = dockerfile.index('RUN /usr/bin/python3.11 -m venv /opt/geointel/venv \\')
+    dependency_install_index = dockerfile.index('/usr/bin/python3.11 -m venv /opt/geointel/venv \\')
     operator_copy_index = dockerfile.index(
         "COPY scripts/render_operator_yolo_label_qa_contact_sheets.py "
         "/app/scripts/render_operator_yolo_label_qa_contact_sheets.py"
@@ -287,12 +290,13 @@ def test_backend_docker_context_contains_gis_import_smoke_script() -> None:
 def test_all_in_one_dockerfile_caches_dependencies_and_uses_cpu_torch_for_ai_runtime() -> None:
     dockerfile = (ROOT / "deploy" / "unraid" / "Dockerfile.all-in-one").read_text(encoding="utf-8")
 
-    metadata_copy_index = dockerfile.index("COPY backend/pyproject.toml backend/README.md /app/")
-    dependency_install_index = dockerfile.index('RUN /usr/bin/python3.11 -m venv /opt/geointel/venv \\')
+    metadata_copy_index = dockerfile.index("COPY backend/pyproject.toml /app/")
+    placeholder_readme_index = dockerfile.index("GeoIntel backend package metadata")
+    dependency_install_index = dockerfile.index('/usr/bin/python3.11 -m venv /opt/geointel/venv \\')
     backend_copy_index = dockerfile.index("COPY backend/ /app/")
     smoke_index = dockerfile.index("RUN python scripts/gis_import_smoke.py")
 
-    assert metadata_copy_index < dependency_install_index < backend_copy_index < smoke_index
+    assert metadata_copy_index < placeholder_readme_index < dependency_install_index < backend_copy_index < smoke_index
     assert "GEOINTEL_TORCH_INDEX_URL=https://download.pytorch.org/whl/cpu" in dockerfile
     assert "GEOINTEL_TORCH_VERSION=2.13.0" in dockerfile
     assert "GEOINTEL_TORCHVISION_VERSION=0.28.0" in dockerfile
diff --git a/backend/tests/test_sprint161_widescreen_workbench.py b/backend/tests/test_sprint161_widescreen_workbench.py
index 620751fa..2ceaa32b 100644
--- a/backend/tests/test_sprint161_widescreen_workbench.py
+++ b/backend/tests/test_sprint161_widescreen_workbench.py
@@ -12,6 +12,10 @@ def test_workbench_adds_widescreen_layout_contracts() -> None:
     assert "grid-template-columns: 14rem minmax(0, 1fr) 24rem;" in css
     assert ".workbench-main {\n    padding: 1.1rem 1.35rem 1.35rem;" in css
     assert ".workspace-grid-data {\n    grid-template-columns: repeat(3, minmax(0, 1fr));" in css
+    assert (
+        ".workspace-grid-analysis,\n  .workspace-grid-ai,\n  .workspace-grid-exports {\n"
+        "    grid-template-columns: repeat(2, minmax(0, 1fr));"
+    ) in css
     assert ".workspace-grid-data > section:nth-child(3) {\n    grid-column: auto;" in css
     assert ".workbench-main .map-container,\n  .map-frame-surface .map-container" in css
     assert "height: calc(100vh - 18rem);" in css
@@ -23,7 +27,10 @@ def test_workbench_adds_ultrawide_map_priority_contracts() -> None:
 
     assert "@media (min-width: 2200px)" in css
     assert "grid-template-columns: 15rem minmax(0, 1fr) 26rem;" in css
-    assert ".workspace-grid-data,\n  .workspace-grid-analysis,\n  .workspace-grid-ai,\n  .workspace-grid-exports" in css
-    assert "grid-template-columns: repeat(4, minmax(0, 1fr));" in css
+    assert ".workspace-grid-data {\n    grid-template-columns: repeat(3, minmax(0, 1fr));" in css
+    assert css.count(
+        ".workspace-grid-analysis,\n  .workspace-grid-ai,\n  .workspace-grid-exports {\n"
+        "    grid-template-columns: repeat(2, minmax(0, 1fr));"
+    ) == 2
     assert "height: calc(100vh - 15.5rem);" in css
     assert "min-height: 42rem;" in css
diff --git a/deploy/unraid/Dockerfile.all-in-one b/deploy/unraid/Dockerfile.all-in-one
index 2573facd..e0e58005 100644
--- a/deploy/unraid/Dockerfile.all-in-one
+++ b/deploy/unraid/Dockerfile.all-in-one
@@ -47,10 +47,11 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
 
 WORKDIR /app
 
-COPY backend/pyproject.toml backend/README.md /app/
+COPY backend/pyproject.toml /app/
 COPY backend/app/__init__.py /app/app/__init__.py
 
-RUN /usr/bin/python3.11 -m venv /opt/geointel/venv \
+RUN printf '# GeoIntel backend package metadata\n' > /app/README.md \
+    && /usr/bin/python3.11 -m venv /opt/geointel/venv \
     && pip install --no-cache-dir --upgrade pip setuptools \
     && if [ "$GEOINTEL_INSTALL_AI" = "true" ]; then \
          pip install --no-cache-dir \
diff --git a/docs/CODEX_EXECUTION_LOG.md b/docs/CODEX_EXECUTION_LOG.md
index eeca2304..38128ae4 100644
--- a/docs/CODEX_EXECUTION_LOG.md
+++ b/docs/CODEX_EXECUTION_LOG.md
@@ -7119,6 +7119,8 @@ Open:
 - Copied the complete operator evaluation/promotion toolchain into the all-in-one image and added a regression that rejects every Docker `COPY scripts/...` source that does not exist.
 - Removed Pydantic protected-namespace warnings for legitimate `model_*` API fields while preserving all schema field names and response contracts.
 - Updated Detection Lab profiles: the new small-building profile is recommended, the previous expanded profile remains the higher-precision legacy choice, and the background-aware `0.35` profile remains conservative.
+- Live `2560x1080` inspection found that two-panel AI/QA/Export workspaces inherited four ultrawide columns and left half of the main canvas empty. Those workspaces now remain explicit two-column grids while the three-panel Data workspace keeps three columns.
+- The all-in-one dependency layer now copies only `pyproject.toml` plus a stable build-only package README before installation; the real `backend/README.md` still enters with the complete backend source, so documentation-only edits no longer invalidate Torch/GIS dependencies.
 - Guarded activation first returned `ready_to_apply`; the reviewed `--apply` pass updated only `GEOINTEL_INSTALL_AI`, `YOLO_ENABLED`, `YOLO_MODELS_DIR` and `YOLO_MODEL_PATH` in the Tower environment.
 
 ## Local validation
diff --git a/frontend/src/styles/app.css b/frontend/src/styles/app.css
index 3cf37e06..490ed509 100644
--- a/frontend/src/styles/app.css
+++ b/frontend/src/styles/app.css
@@ -5231,7 +5231,7 @@ section {
   .workspace-grid-analysis,
   .workspace-grid-ai,
   .workspace-grid-exports {
-    grid-template-columns: repeat(3, minmax(0, 1fr));
+    grid-template-columns: repeat(2, minmax(0, 1fr));
   }
 
   .workspace-grid-data > section:nth-child(3) {
@@ -5266,11 +5266,14 @@ section {
     padding: 1.2rem 1.65rem 1.5rem;
   }
 
-  .workspace-grid-data,
+  .workspace-grid-data {
+    grid-template-columns: repeat(3, minmax(0, 1fr));
+  }
+
   .workspace-grid-analysis,
   .workspace-grid-ai,
   .workspace-grid-exports {
-    grid-template-columns: repeat(4, minmax(0, 1fr));
+    grid-template-columns: repeat(2, minmax(0, 1fr));
   }
 
   .workbench-main .map-container,