Run make-pot only on manual dispatch

Drops the pull_request trigger, so this workflow no longer fires off any
branch or PR - the only way to run it is Actions > Generate POT file > Run
workflow.

Three things fall out of that automatically, since none of them can fire
any more:

- The job's `if:` gate. It existed to filter pull_request events down to
  automatic_translations_* and tm_edits_* head branches; with no automatic
  event left there is nothing to filter, so there is no branch identification
  in this workflow at all now.
- The "Comment on PR if POT file changed" step, which was conditioned on
  github.event.pull_request.
- Every github.head_ref reference, which is only ever set on a pull_request.

PR targeting is unchanged for a dispatch run: `branch` was already
`head_ref || ref_name` and head_ref is empty on dispatch, so it is now just
ref_name; `base` keeps the same `inputs.base || ref_name` precedence with
its develop default.

108 lines, 12 steps.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_019LoLgW7oFjBPxGea9kiZJ2

Author: pattonwebz

.github/workflows/make-pot.yml

@@ -7,23 +7,13 @@ on:
         description: 'Base branch to compare and create PR against.'
         required: false
         default: 'develop'
-  pull_request:
-    types:
-      - opened
-      - synchronize
-      - reopened
+
+# Manual dispatch only - deliberately no push or pull_request trigger, so this
+# never fires off a branch or a PR. That is also why there is no branch gating
+# on the job: there is no automatic event left to filter.
 
 jobs:
   make-pot:
-    if: |
-      github.event_name == 'workflow_dispatch' ||
-      (
-        github.event_name == 'pull_request' &&
-        (
-          startsWith(github.head_ref, 'automatic_translations_') ||
-          startsWith(github.head_ref, 'tm_edits_')
-        )
-      )
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
@@ -87,18 +77,6 @@ jobs:
             echo "pot_changed=true" >> $GITHUB_OUTPUT
           fi
 
-      - name: Comment on PR if POT file changed
-        if: steps.pot_diff.outputs.pot_changed == 'true' && github.event.pull_request
-        uses: actions/github-script@v7
-        with:
-          script: |
-            github.rest.issues.createComment({
-              issue_number: context.issue.number,
-              owner: context.repo.owner,
-              repo: context.repo.repo,
-              body: 'The POT translation file has changed. Please update the POT file in your PR to keep translations up to date.\nThe updated file is available in the artifacts of this workflow run: https://github.com/' + context.repo.owner + '/' + context.repo.repo + '/actions/runs/' + process.env.GITHUB_RUN_ID
-            })
-
       - name: Upload POT file as artifact
         if: steps.pot_diff.outputs.pot_changed == 'true'
         uses: actions/upload-artifact@v4
@@ -125,6 +103,6 @@ jobs:
           commit-message: Update POT translation file
           title: Update POT translation file
           body: This PR updates the POT translation file generated by the workflow.
-          branch: update-translations/${{ github.head_ref || github.ref_name }}
-          base: ${{ github.event.inputs.base || github.head_ref || github.ref_name }}
+          branch: update-translations/${{ github.ref_name }}
+          base: ${{ github.event.inputs.base || github.ref_name }}
           delete-branch: true