Replace nightly build with a nightly changelog post

Native nightly builds are redundant now that changes ship over the air,
so the nightly workflow no longer builds anything. It now only posts the
list of commits since the previous post to the QA team's Slack channel,
and posts nothing when there are no new commits. The commit marker
artifact keeps its name so the first run continues from the last nightly.

The OTA workflow's fallback native iOS build is assigned to the "QA Team"
TestFlight group so testers still get native builds when one is needed.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0157o74F6wX3aTghhc7DLbzd

.github/workflows/bundle-deploy-eas-update.yml

@@ -54,8 +54,6 @@ jobs:
       # A version bump forces a native build even if the fingerprint is unchanged
       changes-detected: ${{ steps.fingerprint.outputs.includes-changes ||
         steps.version.outputs.version-changed }}
-      # Changelog since the last native testflight build, for TestFlight notes and Slack
-      notes: ${{ steps.notes.outputs.notes }}
 
     steps:
       - name: 🔑 Check for EXPO_TOKEN
@@ -179,57 +177,6 @@ jobs:
           retention-days: 1
           if-no-files-found: error
 
-      # Native builds go out to the QA Team TestFlight group, so generate a changelog of
-      # what changed since the last native testflight build. That build's commit SHA is
-      # stored as a "testflight-native-build-commit" artifact, advanced by recordBaseline
-      # only after both native builds succeed, so a failed run's commits roll into the
-      # next successful build's notes rather than being silently dropped.
-      - name: 📝 Generate release notes
-        id: notes
-        if: ${{ steps.fingerprint.outputs.includes-changes ||
-          steps.version.outputs.version-changed }}
-        env:
-          GH_TOKEN: ${{ github.token }}
-          REPOSITORY_ID: ${{ github.repository_id }}
-        run: |
-          prev=""
-          url=$(gh api \
-            "repos/${GITHUB_REPOSITORY}/actions/artifacts?name=testflight-native-build-commit&per_page=100" \
-            --jq "[.artifacts[] | select(
-              .expired == false and
-              .workflow_run.head_branch == \"main\" and
-              .workflow_run.head_repository_id == (\$ENV.REPOSITORY_ID | tonumber)
-            )] | max_by(.created_at) | .archive_download_url" \
-            2>/dev/null || true)
-          if [ -n "$url" ] && [ "$url" != "null" ]; then
-            if curl -sSL -H "Authorization: Bearer $GH_TOKEN" -o marker.zip "$url" \
-              && unzip -o -q marker.zip; then
-              prev=$(tr -d '[:space:]' < testflight-native-build-commit.txt 2>/dev/null || true)
-            fi
-            rm -f marker.zip testflight-native-build-commit.txt
-          fi
-
-          if [ -n "$prev" ] && git cat-file -e "${prev}^{commit}" 2>/dev/null; then
-            echo "Generating notes since previous native build: $prev"
-            range="${prev}..HEAD"
-          else
-            echo "No reachable previous native build commit; falling back to last 30 commits."
-            range="HEAD~30..HEAD"
-          fi
-          notes=$(git log --no-merges --pretty=format:'- %s' "$range" 2>/dev/null | head -n 50)
-          if [ -z "$notes" ]; then
-            notes="No new commits since the last native build."
-          fi
-          # Cap the whole changelog: TestFlight "What to Test" allows 4000 characters and
-          # this also keeps the Slack message a reasonable size. head -c caps the combined
-          # stream; cut -c would only cap each line independently.
-          notes=$(printf '%s' "$notes" | head -c 3900)
-          {
-            echo "notes<<NOTES_EOF"
-            echo "$notes"
-            echo "NOTES_EOF"
-          } >> "$GITHUB_OUTPUT"
-
       - name: 🔤 Compile translations
         uses: ./.github/actions/compile-i18n
 
@@ -319,7 +266,6 @@ jobs:
     with:
       profile: testflight
       testFlightGroup: "QA Team"
-      changelog: ${{ needs.bundleDeploy.outputs.notes }}
       # OTA rebuilds don't need the xlarge builder used for releases
       runner: macos-26
     # Pass only the secrets the reusable workflow declares, rather than `secrets: inherit`,
@@ -370,68 +316,6 @@ jobs:
       ANDROID_KEY_ALIAS: ${{ secrets.ANDROID_KEY_ALIAS }}
       ANDROID_KEY_PASSWORD: ${{ secrets.ANDROID_KEY_PASSWORD }}
 
-  # Native builds go out to the QA team. NIGHTLY_BUILDS_SLACK_WEBHOOK posts to their
-  # channel (the name predates the removal of the nightly build workflow).
-  notifyIOS:
-    name: Notify Slack of iOS build
-    needs: [bundleDeploy, buildIfNecessaryIOS]
-    runs-on: ubuntu-latest
-    steps:
-      - name: 📝 Build Slack payload
-        id: payload
-        env:
-          NOTES: ${{ needs.bundleDeploy.outputs.notes }}
-          VERSION: ${{ needs.buildIfNecessaryIOS.outputs.package-version }}
-          BUILD_NUMBER: ${{ needs.buildIfNecessaryIOS.outputs.build-number }}
-        run: |
-          text="*New iOS build available in TestFlight (QA Team)*
-          Version ${VERSION} (${BUILD_NUMBER})
-
-          ${NOTES}"
-          payload=$(jq -n --arg text "$text" '{text: $text}')
-          {
-            echo "payload<<PAYLOAD_EOF"
-            echo "$payload"
-            echo "PAYLOAD_EOF"
-          } >> "$GITHUB_OUTPUT"
-
-      - name: 🔔 Notify Slack
-        uses: slackapi/slack-github-action@dcb1066f776dd043e64d0e8ba94ca15cc7e1875d # v4.0.0
-        with:
-          webhook: ${{ secrets.NIGHTLY_BUILDS_SLACK_WEBHOOK }}
-          webhook-type: incoming-webhook
-          payload: ${{ steps.payload.outputs.payload }}
-
-  notifyAndroid:
-    name: Notify Slack of Android build
-    needs: [bundleDeploy, buildIfNecessaryAndroid]
-    runs-on: ubuntu-latest
-    steps:
-      - name: 📝 Build Slack payload
-        id: payload
-        env:
-          NOTES: ${{ needs.bundleDeploy.outputs.notes }}
-          VERSION: ${{ needs.buildIfNecessaryAndroid.outputs.package-version }}
-          VERSION_CODE: ${{ needs.buildIfNecessaryAndroid.outputs.version-code }}
-        run: |
-          text="*New Android build available (Internal track)*
-          Version ${VERSION} (${VERSION_CODE})
-
-          ${NOTES}"
-          payload=$(jq -n --arg text "$text" '{text: $text}')
-          {
-            echo "payload<<PAYLOAD_EOF"
-            echo "$payload"
-            echo "PAYLOAD_EOF"
-          } >> "$GITHUB_OUTPUT"
-
-      - name: 🔔 Notify Slack
-        uses: slackapi/slack-github-action@dcb1066f776dd043e64d0e8ba94ca15cc7e1875d # v4.0.0
-        with:
-          webhook: ${{ secrets.NIGHTLY_BUILDS_SLACK_WEBHOOK }}
-          webhook-type: incoming-webhook
-          payload: ${{ steps.payload.outputs.payload }}
-
   # Advance the fingerprint baseline only after BOTH native builds have shipped
   # the new native surface. This replaces the old actions/cache baseline, which
   # only advanced on cache eviction and so silently froze - freezing meant every
@@ -476,20 +360,3 @@ jobs:
           path: native-fingerprint.json
           retention-days: 90
           if-no-files-found: error
-
-      # The changelog marker only moves when native builds actually shipped; an OTA-only
-      # deploy must not advance it, or the next build's notes would miss those commits.
-      - name: ✏️ Write native build commit marker
-        if: ${{ needs.bundleDeploy.outputs.changes-detected == 'true' }}
-        env:
-          GITHUB_SHA: ${{ github.sha }}
-        run: echo "$GITHUB_SHA" > testflight-native-build-commit.txt
-
-      - name: 🚀 Record native build commit marker
-        if: ${{ needs.bundleDeploy.outputs.changes-detected == 'true' }}
-        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
-        with:
-          name: testflight-native-build-commit
-          path: testflight-native-build-commit.txt
-          retention-days: 90
-          if-no-files-found: error