diff --git a/.gitea/workflows/cicd.yaml b/.gitea/workflows/cicd.yaml
index a478d6c..c5266c7 100644
--- a/.gitea/workflows/cicd.yaml
+++ b/.gitea/workflows/cicd.yaml
@@ -273,6 +273,34 @@ jobs:
 
       - *failure_diagnostics_step
 
+  build-cicd-postmortem:
+    name: Build CICD Image Failure Postmortem
+    runs-on: ubuntu-act
+    needs: build_cicd
+    if: always() && needs.build_cicd.result == 'failure'
+    timeout-minutes: 10
+    steps:
+      - name: Identify runner
+        run: |
+          echo "=== Runner Identity ==="
+          echo "runner_name=${RUNNER_NAME:-unknown}"
+          echo "runner_hostname=${HOSTNAME:-unknown}"
+          echo "timestamp_utc=$(date -u +%Y-%m-%dT%H:%M:%SZ)"
+
+      - name: Build CICD postmortem diagnostics
+        run: |
+          echo "=== Build CICD Postmortem ==="
+          echo "build_cicd_result=${{ needs.build_cicd.result }}"
+          uname -a || true
+          cat /etc/os-release 2>/dev/null || true
+          df -h || true
+          free -h || true
+          if command -v docker >/dev/null 2>&1; then
+            docker version || true
+            docker info || true
+          fi
+          timeout 10 curl -fsSIL "https://${GITEA_REGISTRY}/v2/" || true
+
   backend-tests:
     name: Backend Tests
     runs-on: ubuntu-act
@@ -488,11 +516,170 @@ jobs:
     name: CICD Tests Complete
     runs-on: ubuntu-act
     needs: [backend-tests, precommit-tests, frontend-tests, xdoctest]
+    if: always()
     steps:
       - name: Confirm all source lanes passed
         run: |
+          set -euo pipefail
+          backend_status="${{ needs.backend-tests.result }}"
+          precommit_status="${{ needs.precommit-tests.result }}"
+          frontend_status="${{ needs.frontend-tests.result }}"
+          xdoctest_status="${{ needs.xdoctest.result }}"
+
+          echo "backend-tests=${backend_status}"
+          echo "precommit-tests=${precommit_status}"
+          echo "frontend-tests=${frontend_status}"
+          echo "xdoctest=${xdoctest_status}"
+
+          if [ "${backend_status}" != "success" ] || [ "${precommit_status}" != "success" ] || [ "${frontend_status}" != "success" ] || [ "${xdoctest_status}" != "success" ]; then
+            echo "❌ One or more CICD source lanes failed"
+            exit 1
+          fi
+
           echo "✅ Source checks complete"
 
+      - *failure_diagnostics_step
+
+  build-backend-base-image:
+    name: Build Backend Base Image
+    runs-on: ubuntu-act-8gb
+    needs: [build_cicd, cicd-tests-complete]
+    outputs:
+      backend_base_tag_ref: ${{ steps.backend_base_ref.outputs.backend_base_tag_ref }}
+      backend_base_digest_ref: ${{ steps.backend_base_ref.outputs.backend_base_digest_ref }}
+    steps:
+      - name: Resolve head SHA
+        id: meta
+        run: |
+          echo "head_sha=${{ needs.build_cicd.outputs.head_sha }}" >> "$GITHUB_OUTPUT"
+
+      - name: Minimal checkout for backend base image inputs
+        env:
+          SSH_PRIVATE_KEY: ${{ secrets.SSH_PRIVATE_KEY }}
+          HEAD_SHA: ${{ steps.meta.outputs.head_sha }}
+        run: |
+          set -euo pipefail
+          umask 077
+          trap 'rm -f ~/.ssh/id_rsa' EXIT
+
+          if ! grep -q "${GITEA_REGISTRY_HOST}" /etc/hosts; then
+            echo "${GITEA_REGISTRY_IP} ${GITEA_REGISTRY_HOST}" >> /etc/hosts
+          fi
+
+          mkdir -p ~/.ssh
+          echo "${SSH_PRIVATE_KEY}" > ~/.ssh/id_rsa
+          chmod 600 ~/.ssh/id_rsa
+          ssh-keyscan -p "${GITEA_SSH_PORT}" "${GITEA_SSH_HOST}" >> ~/.ssh/known_hosts 2>/dev/null
+
+          GIT_SSH_COMMAND="ssh -i ~/.ssh/id_rsa -o IdentitiesOnly=yes -o StrictHostKeyChecking=no" \
+            git clone --depth 1 --no-checkout "${GITEA_REPO_SSH_URL}" .
+
+          if GIT_SSH_COMMAND="ssh -i ~/.ssh/id_rsa -o IdentitiesOnly=yes -o StrictHostKeyChecking=no" \
+            git fetch --depth 1 origin "${HEAD_SHA}" >/dev/null 2>&1; then
+            git checkout FETCH_HEAD -- Dockerfile.backend backend/pyproject.toml backend/uv.lock
+          else
+            git checkout HEAD -- Dockerfile.backend backend/pyproject.toml backend/uv.lock
+          fi
+
+      - name: Build and push backend base image
+        id: backend_base_ref
+        env:
+          PACKAGE_ACCESS_TOKEN: ${{ secrets.PACKAGE_ACCESS_TOKEN }}
+          REGISTRY_USER: ${{ github.actor }}
+          HEAD_SHA: ${{ steps.meta.outputs.head_sha }}
+        run: |
+          set -euo pipefail
+
+          echo "${PACKAGE_ACCESS_TOKEN}" | docker login "http://${GITEA_REGISTRY}" -u "${REGISTRY_USER}" --password-stdin
+          BACKEND_BASE_REPO="${GITEA_REGISTRY}/darkhelm.org/plex-playlist-backend-base"
+          BACKEND_BASE_TAG_REF="${BACKEND_BASE_REPO}:${HEAD_SHA}"
+
+          docker build -f Dockerfile.backend --target dependencies -t plex-playlist-backend-base:"${HEAD_SHA}" .
+          docker tag plex-playlist-backend-base:"${HEAD_SHA}" "${BACKEND_BASE_TAG_REF}"
+          docker push "${BACKEND_BASE_TAG_REF}"
+          docker pull "${BACKEND_BASE_TAG_REF}" >/dev/null
+
+          BACKEND_BASE_DIGEST_REF="$({ docker image inspect --format '{{range .RepoDigests}}{{println .}}{{end}}' "${BACKEND_BASE_TAG_REF}" | grep "^${BACKEND_BASE_REPO}@sha256:" | head -n 1; } || true)"
+          if [ -z "${BACKEND_BASE_DIGEST_REF}" ]; then
+            echo "❌ Unable to resolve backend base image digest"
+            exit 1
+          fi
+
+          echo "backend_base_tag_ref=${BACKEND_BASE_TAG_REF}" >> "$GITHUB_OUTPUT"
+          echo "backend_base_digest_ref=${BACKEND_BASE_DIGEST_REF}" >> "$GITHUB_OUTPUT"
+
+      - *failure_diagnostics_step
+
+  build-frontend-base-image:
+    name: Build Frontend Base Image
+    runs-on: ubuntu-act-8gb
+    needs: [build_cicd, cicd-tests-complete]
+    outputs:
+      frontend_base_tag_ref: ${{ steps.frontend_base_ref.outputs.frontend_base_tag_ref }}
+      frontend_base_digest_ref: ${{ steps.frontend_base_ref.outputs.frontend_base_digest_ref }}
+    steps:
+      - name: Resolve head SHA
+        id: meta
+        run: |
+          echo "head_sha=${{ needs.build_cicd.outputs.head_sha }}" >> "$GITHUB_OUTPUT"
+
+      - name: Minimal checkout for frontend base image inputs
+        env:
+          SSH_PRIVATE_KEY: ${{ secrets.SSH_PRIVATE_KEY }}
+          HEAD_SHA: ${{ steps.meta.outputs.head_sha }}
+        run: |
+          set -euo pipefail
+          umask 077
+          trap 'rm -f ~/.ssh/id_rsa' EXIT
+
+          if ! grep -q "${GITEA_REGISTRY_HOST}" /etc/hosts; then
+            echo "${GITEA_REGISTRY_IP} ${GITEA_REGISTRY_HOST}" >> /etc/hosts
+          fi
+
+          mkdir -p ~/.ssh
+          echo "${SSH_PRIVATE_KEY}" > ~/.ssh/id_rsa
+          chmod 600 ~/.ssh/id_rsa
+          ssh-keyscan -p "${GITEA_SSH_PORT}" "${GITEA_SSH_HOST}" >> ~/.ssh/known_hosts 2>/dev/null
+
+          GIT_SSH_COMMAND="ssh -i ~/.ssh/id_rsa -o IdentitiesOnly=yes -o StrictHostKeyChecking=no" \
+            git clone --depth 1 --no-checkout "${GITEA_REPO_SSH_URL}" .
+
+          if GIT_SSH_COMMAND="ssh -i ~/.ssh/id_rsa -o IdentitiesOnly=yes -o StrictHostKeyChecking=no" \
+            git fetch --depth 1 origin "${HEAD_SHA}" >/dev/null 2>&1; then
+            git checkout FETCH_HEAD -- Dockerfile.frontend frontend/package.json frontend/yarn.lock frontend/.yarnrc.yml
+          else
+            git checkout HEAD -- Dockerfile.frontend frontend/package.json frontend/yarn.lock frontend/.yarnrc.yml
+          fi
+
+      - name: Build and push frontend base image
+        id: frontend_base_ref
+        env:
+          PACKAGE_ACCESS_TOKEN: ${{ secrets.PACKAGE_ACCESS_TOKEN }}
+          REGISTRY_USER: ${{ github.actor }}
+          HEAD_SHA: ${{ steps.meta.outputs.head_sha }}
+        run: |
+          set -euo pipefail
+
+          echo "${PACKAGE_ACCESS_TOKEN}" | docker login "http://${GITEA_REGISTRY}" -u "${REGISTRY_USER}" --password-stdin
+          FRONTEND_BASE_REPO="${GITEA_REGISTRY}/darkhelm.org/plex-playlist-frontend-base"
+          FRONTEND_BASE_TAG_REF="${FRONTEND_BASE_REPO}:${HEAD_SHA}"
+
+          docker build -f Dockerfile.frontend --target deps -t plex-playlist-frontend-base:"${HEAD_SHA}" .
+          docker tag plex-playlist-frontend-base:"${HEAD_SHA}" "${FRONTEND_BASE_TAG_REF}"
+          docker push "${FRONTEND_BASE_TAG_REF}"
+          docker pull "${FRONTEND_BASE_TAG_REF}" >/dev/null
+
+          FRONTEND_BASE_DIGEST_REF="$({ docker image inspect --format '{{range .RepoDigests}}{{println .}}{{end}}' "${FRONTEND_BASE_TAG_REF}" | grep "^${FRONTEND_BASE_REPO}@sha256:" | head -n 1; } || true)"
+          if [ -z "${FRONTEND_BASE_DIGEST_REF}" ]; then
+            echo "❌ Unable to resolve frontend base image digest"
+            exit 1
+          fi
+
+          echo "frontend_base_tag_ref=${FRONTEND_BASE_TAG_REF}" >> "$GITHUB_OUTPUT"
+          echo "frontend_base_digest_ref=${FRONTEND_BASE_DIGEST_REF}" >> "$GITHUB_OUTPUT"
+
+      - *failure_diagnostics_step
+
   build-integration-tester-image:
     name: Build Integration Tester Image
     runs-on: ubuntu-act-8gb
@@ -696,9 +883,10 @@ jobs:
       - *failure_diagnostics_step
 
   runtime_images:
-    name: Build and Publish Runtime Images
+    name: Build and Publish Runtime Images (Legacy Disabled)
     runs-on: ubuntu-act-8gb
-    needs: [build_cicd, cicd-tests-complete]
+    if: false
+    needs: [build_cicd, cicd-tests-complete, build-backend-base-image, build-frontend-base-image]
     timeout-minutes: 45
     outputs:
       head_sha: ${{ steps.meta.outputs.head_sha }}
@@ -903,22 +1091,264 @@ jobs:
 
       - *failure_diagnostics_step
 
+  build-backend-main-image:
+    name: Build Backend Main Image
+    runs-on: ubuntu-act-8gb
+    needs: [build_cicd, cicd-tests-complete, build-backend-base-image]
+    outputs:
+      head_sha: ${{ steps.meta.outputs.head_sha }}
+      deployable_backend_tag_ref: ${{ steps.deployable_backend_ref.outputs.deployable_backend_tag_ref }}
+      deployable_backend_digest_ref: ${{ steps.deployable_backend_ref.outputs.deployable_backend_digest_ref }}
+    steps:
+      - name: Resolve head SHA
+        id: meta
+        run: |
+          echo "head_sha=${{ needs.build_cicd.outputs.head_sha }}" >> "$GITHUB_OUTPUT"
+
+      - name: Minimal checkout for backend main image inputs
+        env:
+          SSH_PRIVATE_KEY: ${{ secrets.SSH_PRIVATE_KEY }}
+          HEAD_SHA: ${{ steps.meta.outputs.head_sha }}
+        run: |
+          set -euo pipefail
+          umask 077
+          trap 'rm -f ~/.ssh/id_rsa' EXIT
+
+          if ! grep -q "${GITEA_REGISTRY_HOST}" /etc/hosts; then
+            echo "${GITEA_REGISTRY_IP} ${GITEA_REGISTRY_HOST}" >> /etc/hosts
+          fi
+
+          mkdir -p ~/.ssh
+          echo "${SSH_PRIVATE_KEY}" > ~/.ssh/id_rsa
+          chmod 600 ~/.ssh/id_rsa
+          ssh-keyscan -p "${GITEA_SSH_PORT}" "${GITEA_SSH_HOST}" >> ~/.ssh/known_hosts 2>/dev/null
+
+          GIT_SSH_COMMAND="ssh -i ~/.ssh/id_rsa -o IdentitiesOnly=yes -o StrictHostKeyChecking=no" \
+            git clone --depth 1 --no-checkout "${GITEA_REPO_SSH_URL}" .
+
+          if GIT_SSH_COMMAND="ssh -i ~/.ssh/id_rsa -o IdentitiesOnly=yes -o StrictHostKeyChecking=no" \
+            git fetch --depth 1 origin "${HEAD_SHA}" >/dev/null 2>&1; then
+            git checkout FETCH_HEAD -- \
+              .dockerignore \
+              Dockerfile.backend \
+              backend \
+              scripts/verify-deployable-image-purity.sh
+          else
+            git checkout HEAD -- \
+              .dockerignore \
+              Dockerfile.backend \
+              backend \
+              scripts/verify-deployable-image-purity.sh
+          fi
+
+      - name: Build and push backend main image
+        id: deployable_backend_ref
+        env:
+          PACKAGE_ACCESS_TOKEN: ${{ secrets.PACKAGE_ACCESS_TOKEN }}
+          REGISTRY_USER: ${{ github.actor }}
+          HEAD_SHA: ${{ steps.meta.outputs.head_sha }}
+        run: |
+          set -euo pipefail
+
+          retry_registry_op() {
+            op_name="$1"
+            image_ref="$2"
+            attempts="${3:-5}"
+            backoff="${4:-3}"
+            attempt=1
+
+            while [ "${attempt}" -le "${attempts}" ]; do
+              echo "${op_name} attempt ${attempt}/${attempts} for ${image_ref}"
+              if [ "${op_name}" = "push" ]; then
+                if docker push "${image_ref}"; then
+                  return 0
+                fi
+              else
+                if docker pull "${image_ref}" >/dev/null; then
+                  return 0
+                fi
+              fi
+
+              if [ "${attempt}" -lt "${attempts}" ]; then
+                sleep_seconds=$((backoff * attempt))
+                echo "Retrying in ${sleep_seconds}s"
+                sleep "${sleep_seconds}"
+              fi
+              attempt=$((attempt + 1))
+            done
+
+            return 1
+          }
+
+          docker build -f Dockerfile.backend -t deployable-backend:"${HEAD_SHA}" .
+          bash ./scripts/verify-deployable-image-purity.sh --image deployable-backend:"${HEAD_SHA}" --profile backend
+
+          echo "${PACKAGE_ACCESS_TOKEN}" | docker login "http://${GITEA_REGISTRY}" -u "${REGISTRY_USER}" --password-stdin
+          DEPLOYABLE_BACKEND_REPO="${GITEA_REGISTRY}/darkhelm.org/deployable-backend"
+          DEPLOYABLE_BACKEND_TAG_REF="${DEPLOYABLE_BACKEND_REPO}:${HEAD_SHA}"
+          docker tag "deployable-backend:${HEAD_SHA}" "${DEPLOYABLE_BACKEND_TAG_REF}"
+
+          retry_registry_op push "${DEPLOYABLE_BACKEND_TAG_REF}" 5 4
+          retry_registry_op pull "${DEPLOYABLE_BACKEND_TAG_REF}" 5 3
+
+          DEPLOYABLE_BACKEND_DIGEST_REF="$({ docker image inspect --format '{{range .RepoDigests}}{{println .}}{{end}}' "${DEPLOYABLE_BACKEND_TAG_REF}" | grep "^${DEPLOYABLE_BACKEND_REPO}@sha256:" | head -n 1; } || true)"
+          if [ -z "${DEPLOYABLE_BACKEND_DIGEST_REF}" ]; then
+            echo "❌ Unable to resolve backend main digest"
+            exit 1
+          fi
+
+          echo "deployable_backend_tag_ref=${DEPLOYABLE_BACKEND_TAG_REF}" >> "$GITHUB_OUTPUT"
+          echo "deployable_backend_digest_ref=${DEPLOYABLE_BACKEND_DIGEST_REF}" >> "$GITHUB_OUTPUT"
+
+      - *failure_diagnostics_step
+
+  build-frontend-main-image:
+    name: Build Frontend Main Image
+    runs-on: ubuntu-act-8gb
+    needs: [build_cicd, cicd-tests-complete, build-frontend-base-image]
+    outputs:
+      head_sha: ${{ steps.meta.outputs.head_sha }}
+      deployable_frontend_tag_ref: ${{ steps.deployable_frontend_ref.outputs.deployable_frontend_tag_ref }}
+      deployable_frontend_digest_ref: ${{ steps.deployable_frontend_ref.outputs.deployable_frontend_digest_ref }}
+    steps:
+      - name: Resolve head SHA
+        id: meta
+        run: |
+          echo "head_sha=${{ needs.build_cicd.outputs.head_sha }}" >> "$GITHUB_OUTPUT"
+
+      - name: Minimal checkout for frontend main image inputs
+        env:
+          SSH_PRIVATE_KEY: ${{ secrets.SSH_PRIVATE_KEY }}
+          HEAD_SHA: ${{ steps.meta.outputs.head_sha }}
+        run: |
+          set -euo pipefail
+          umask 077
+          trap 'rm -f ~/.ssh/id_rsa' EXIT
+
+          if ! grep -q "${GITEA_REGISTRY_HOST}" /etc/hosts; then
+            echo "${GITEA_REGISTRY_IP} ${GITEA_REGISTRY_HOST}" >> /etc/hosts
+          fi
+
+          mkdir -p ~/.ssh
+          echo "${SSH_PRIVATE_KEY}" > ~/.ssh/id_rsa
+          chmod 600 ~/.ssh/id_rsa
+          ssh-keyscan -p "${GITEA_SSH_PORT}" "${GITEA_SSH_HOST}" >> ~/.ssh/known_hosts 2>/dev/null
+
+          GIT_SSH_COMMAND="ssh -i ~/.ssh/id_rsa -o IdentitiesOnly=yes -o StrictHostKeyChecking=no" \
+            git clone --depth 1 --no-checkout "${GITEA_REPO_SSH_URL}" .
+
+          if GIT_SSH_COMMAND="ssh -i ~/.ssh/id_rsa -o IdentitiesOnly=yes -o StrictHostKeyChecking=no" \
+            git fetch --depth 1 origin "${HEAD_SHA}" >/dev/null 2>&1; then
+            git checkout FETCH_HEAD -- \
+              .dockerignore \
+              Dockerfile.frontend \
+              frontend \
+              scripts/verify-deployable-image-purity.sh
+          else
+            git checkout HEAD -- \
+              .dockerignore \
+              Dockerfile.frontend \
+              frontend \
+              scripts/verify-deployable-image-purity.sh
+          fi
+
+      - name: Build and push frontend main image
+        id: deployable_frontend_ref
+        env:
+          PACKAGE_ACCESS_TOKEN: ${{ secrets.PACKAGE_ACCESS_TOKEN }}
+          REGISTRY_USER: ${{ github.actor }}
+          HEAD_SHA: ${{ steps.meta.outputs.head_sha }}
+        run: |
+          set -euo pipefail
+
+          retry_registry_op() {
+            op_name="$1"
+            image_ref="$2"
+            attempts="${3:-5}"
+            backoff="${4:-3}"
+            attempt=1
+
+            while [ "${attempt}" -le "${attempts}" ]; do
+              echo "${op_name} attempt ${attempt}/${attempts} for ${image_ref}"
+              if [ "${op_name}" = "push" ]; then
+                if docker push "${image_ref}"; then
+                  return 0
+                fi
+              else
+                if docker pull "${image_ref}" >/dev/null; then
+                  return 0
+                fi
+              fi
+
+              if [ "${attempt}" -lt "${attempts}" ]; then
+                sleep_seconds=$((backoff * attempt))
+                echo "Retrying in ${sleep_seconds}s"
+                sleep "${sleep_seconds}"
+              fi
+              attempt=$((attempt + 1))
+            done
+
+            return 1
+          }
+
+          docker build -f Dockerfile.frontend --target production -t deployable-frontend:"${HEAD_SHA}" .
+          bash ./scripts/verify-deployable-image-purity.sh --image deployable-frontend:"${HEAD_SHA}" --profile frontend
+
+          echo "${PACKAGE_ACCESS_TOKEN}" | docker login "http://${GITEA_REGISTRY}" -u "${REGISTRY_USER}" --password-stdin
+          DEPLOYABLE_FRONTEND_REPO="${GITEA_REGISTRY}/darkhelm.org/deployable-frontend"
+          DEPLOYABLE_FRONTEND_TAG_REF="${DEPLOYABLE_FRONTEND_REPO}:${HEAD_SHA}"
+          docker tag "deployable-frontend:${HEAD_SHA}" "${DEPLOYABLE_FRONTEND_TAG_REF}"
+
+          retry_registry_op push "${DEPLOYABLE_FRONTEND_TAG_REF}" 5 4
+          retry_registry_op pull "${DEPLOYABLE_FRONTEND_TAG_REF}" 5 3
+
+          DEPLOYABLE_FRONTEND_DIGEST_REF="$({ docker image inspect --format '{{range .RepoDigests}}{{println .}}{{end}}' "${DEPLOYABLE_FRONTEND_TAG_REF}" | grep "^${DEPLOYABLE_FRONTEND_REPO}@sha256:" | head -n 1; } || true)"
+          if [ -z "${DEPLOYABLE_FRONTEND_DIGEST_REF}" ]; then
+            echo "❌ Unable to resolve frontend main digest"
+            exit 1
+          fi
+
+          echo "deployable_frontend_tag_ref=${DEPLOYABLE_FRONTEND_TAG_REF}" >> "$GITHUB_OUTPUT"
+          echo "deployable_frontend_digest_ref=${DEPLOYABLE_FRONTEND_DIGEST_REF}" >> "$GITHUB_OUTPUT"
+
+      - *failure_diagnostics_step
+
   production-images-complete:
     name: Production Images Complete
-    runs-on: ubuntu-act
-    needs: runtime_images
+    runs-on: ubuntu-act-8gb
+    needs: [build-backend-main-image, build-frontend-main-image, build-integration-tester-image, build-e2e-tester-image]
+    if: always()
+    timeout-minutes: 10
     steps:
-      - name: Confirm deployable runtime images are published
+      - name: Confirm required production/tester images are complete
         run: |
-          echo "✅ Deployable backend/frontend runtime images are available"
+          set -euo pipefail
+          backend_main_status="${{ needs.build-backend-main-image.result }}"
+          frontend_main_status="${{ needs.build-frontend-main-image.result }}"
+          integration_tester_status="${{ needs.build-integration-tester-image.result }}"
+          e2e_tester_status="${{ needs.build-e2e-tester-image.result }}"
+
+          echo "build-backend-main-image=${backend_main_status}"
+          echo "build-frontend-main-image=${frontend_main_status}"
+          echo "build-integration-tester-image=${integration_tester_status}"
+          echo "build-e2e-tester-image=${e2e_tester_status}"
+
+          if [ "${backend_main_status}" != "success" ] || [ "${frontend_main_status}" != "success" ] || [ "${integration_tester_status}" != "success" ] || [ "${e2e_tester_status}" != "success" ]; then
+            echo "❌ Production Images Complete gate failed"
+            exit 1
+          fi
+
+          echo "✅ Production, integration tester, and E2E tester images are complete"
+
+      - *failure_diagnostics_step
 
   runtime-images-postmortem:
     name: Runtime Images Failure Postmortem
     # Run on the broader runner pool so we can still capture diagnostics when
     # runtime_images fails during platform "Set up job" before any step executes.
-    runs-on: ubuntu-act
-    needs: runtime_images
-    if: always() && needs.runtime_images.result == 'failure'
+    runs-on: ubuntu-act-8gb
+    needs: [runtime_images, build-backend-main-image, build-frontend-main-image, build-integration-tester-image, build-e2e-tester-image]
+    if: always() && (needs.runtime_images.result == 'failure' || needs['build-backend-main-image'].result == 'failure' || needs['build-frontend-main-image'].result == 'failure' || needs['build-integration-tester-image'].result == 'failure' || needs['build-e2e-tester-image'].result == 'failure')
     timeout-minutes: 10
     steps:
       - name: Identify runner
@@ -1135,7 +1565,7 @@ jobs:
     # Pin integration tests to high-memory worker to reduce setup-stage runner churn.
     runs-on: ubuntu-act-8gb
     timeout-minutes: 20
-    needs: [runtime_images, production-images-complete, build-integration-tester-image]
+    needs: [build_cicd, production-images-complete, build-backend-main-image, build-frontend-main-image, build-integration-tester-image]
     steps:
       - name: Identify runner
         run: |
@@ -1152,9 +1582,9 @@ jobs:
       - *configure_registry_host_step
       - name: Run runtime black-box integration checks via compose
         env:
-          HEAD_SHA: ${{ needs.runtime_images.outputs.head_sha }}
-          DEPLOYABLE_BACKEND_TAG_REF: ${{ needs.runtime_images.outputs.deployable_backend_tag_ref }}
-          DEPLOYABLE_BACKEND_DIGEST_REF: ${{ needs.runtime_images.outputs.deployable_backend_digest_ref }}
+          HEAD_SHA: ${{ needs.build_cicd.outputs.head_sha }}
+          DEPLOYABLE_BACKEND_TAG_REF: ${{ needs.build-backend-main-image.outputs.deployable_backend_tag_ref }}
+          DEPLOYABLE_BACKEND_DIGEST_REF: ${{ needs.build-backend-main-image.outputs.deployable_backend_digest_ref }}
           INTEGRATION_TESTER_DIGEST_REF: ${{ needs.build-integration-tester-image.outputs.integration_tester_digest_ref }}
         run: |
           set -euo pipefail
@@ -1365,12 +1795,33 @@ jobs:
 
       - *failure_diagnostics_step
 
+  integration-tests-postmortem:
+    name: Integration Tests Failure Postmortem
+    runs-on: ubuntu-act
+    needs: integration-tests
+    if: always() && needs.integration-tests.result == 'failure'
+    timeout-minutes: 10
+    steps:
+      - name: Integration postmortem diagnostics
+        run: |
+          echo "=== Integration Tests Postmortem ==="
+          echo "integration_tests_result=${{ needs.integration-tests.result }}"
+          uname -a || true
+          cat /etc/os-release 2>/dev/null || true
+          df -h || true
+          free -h || true
+          if command -v docker >/dev/null 2>&1; then
+            docker version || true
+            docker info || true
+          fi
+          timeout 10 curl -fsSIL "https://${GITEA_REGISTRY}/v2/" || true
+
   e2e-tests:
     name: End-to-End Tests
     # Use ubuntu-act runner pool for consistent availability.
     runs-on: ubuntu-act-8gb
     timeout-minutes: 45
-    needs: [runtime_images, production-images-complete, build-integration-tester-image, build-e2e-tester-image]
+    needs: [build_cicd, production-images-complete, build-backend-main-image, build-frontend-main-image, build-integration-tester-image, build-e2e-tester-image]
     steps:
       - name: Identify runner
         run: |
@@ -1387,12 +1838,12 @@ jobs:
       - *configure_registry_host_step
       - name: Run E2E tests against runtime services via compose
         env:
-          HEAD_SHA: ${{ needs.runtime_images.outputs.head_sha }}
+          HEAD_SHA: ${{ needs.build_cicd.outputs.head_sha }}
           SSH_PRIVATE_KEY: ${{ secrets.SSH_PRIVATE_KEY }}
-          DEPLOYABLE_BACKEND_TAG_REF: ${{ needs.runtime_images.outputs.deployable_backend_tag_ref }}
-          DEPLOYABLE_BACKEND_DIGEST_REF: ${{ needs.runtime_images.outputs.deployable_backend_digest_ref }}
-          DEPLOYABLE_FRONTEND_TAG_REF: ${{ needs.runtime_images.outputs.deployable_frontend_tag_ref }}
-          DEPLOYABLE_FRONTEND_DIGEST_REF: ${{ needs.runtime_images.outputs.deployable_frontend_digest_ref }}
+          DEPLOYABLE_BACKEND_TAG_REF: ${{ needs.build-backend-main-image.outputs.deployable_backend_tag_ref }}
+          DEPLOYABLE_BACKEND_DIGEST_REF: ${{ needs.build-backend-main-image.outputs.deployable_backend_digest_ref }}
+          DEPLOYABLE_FRONTEND_TAG_REF: ${{ needs.build-frontend-main-image.outputs.deployable_frontend_tag_ref }}
+          DEPLOYABLE_FRONTEND_DIGEST_REF: ${{ needs.build-frontend-main-image.outputs.deployable_frontend_digest_ref }}
           INTEGRATION_TESTER_DIGEST_REF: ${{ needs.build-integration-tester-image.outputs.integration_tester_digest_ref }}
           E2E_TESTER_DIGEST_REF: ${{ needs.build-e2e-tester-image.outputs.e2e_tester_digest_ref }}
         run: |
@@ -1720,3 +2171,24 @@ jobs:
           find "${ARTIFACT_DIR}" -maxdepth 2 -type f | sort || true
 
       - *failure_diagnostics_step
+
+  e2e-tests-postmortem:
+    name: E2E Tests Failure Postmortem
+    runs-on: ubuntu-act
+    needs: e2e-tests
+    if: always() && needs.e2e-tests.result == 'failure'
+    timeout-minutes: 10
+    steps:
+      - name: E2E postmortem diagnostics
+        run: |
+          echo "=== E2E Tests Postmortem ==="
+          echo "e2e_tests_result=${{ needs.e2e-tests.result }}"
+          uname -a || true
+          cat /etc/os-release 2>/dev/null || true
+          df -h || true
+          free -h || true
+          if command -v docker >/dev/null 2>&1; then
+            docker version || true
+            docker info || true
+          fi
+          timeout 10 curl -fsSIL "https://${GITEA_REGISTRY}/v2/" || true
diff --git a/Dockerfile.frontend b/Dockerfile.frontend
index b66cb41..662b7ae 100644
--- a/Dockerfile.frontend
+++ b/Dockerfile.frontend
@@ -1,11 +1,13 @@
 # Frontend Dockerfile for Vue/Vite TypeScript project
-FROM node:24-alpine AS build
+FROM node:24-alpine AS deps
 
 WORKDIR /app
 
 COPY frontend/package.json frontend/yarn.lock frontend/.yarnrc.yml ./
 RUN corepack enable && yarn install --immutable
 
+FROM deps AS build
+
 COPY frontend/ .
 RUN yarn build