tauri comments (#5634)

# Description of Changes

<!--
Please provide a summary of the changes, including:

- What was changed
- Why the change was made
- Any challenges encountered

Closes #(issue_number)
-->

---

## Checklist

### General

- [ ] I have read the [Contribution
Guidelines](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/CONTRIBUTING.md)
- [ ] I have read the [Stirling-PDF Developer
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/DeveloperGuide.md)
(if applicable)
- [ ] I have read the [How to add new languages to
Stirling-PDF](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/HowToAddNewLanguage.md)
(if applicable)
- [ ] I have performed a self-review of my own code
- [ ] My changes generate no new warnings

### Documentation

- [ ] I have updated relevant docs on [Stirling-PDF's doc
repo](https://github.com/Stirling-Tools/Stirling-Tools.github.io/blob/main/docs/)
(if functionality has heavily changed)
- [ ] I have read the section [Add New Translation
Tags](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/HowToAddNewLanguage.md#add-new-translation-tags)
(for new translation tags only)

### Translations (if applicable)

- [ ] I ran
[`scripts/counter_translation.py`](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/docs/counter_translation.md)

### UI Changes (if applicable)

- [ ] Screenshots or videos demonstrating the UI changes are attached
(e.g., as comments or direct attachments in the PR)

### Testing (if applicable)

- [ ] I have tested my changes locally. Refer to the [Testing
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/DeveloperGuide.md#6-testing)
for more details.

.github/workflows/tauri-build.yml

@@ -25,6 +25,7 @@ on:
 
 permissions:
   contents: read
+  pull-requests: write
 
 jobs:
   determine-matrix:
@@ -639,6 +640,100 @@ jobs:
             fi
           done
 
+  pr-comment:
+    needs: build
+    runs-on: ubuntu-latest
+    if: github.event_name == 'pull_request' && needs.build.result == 'success'
+    permissions:
+      pull-requests: write
+    steps:
+      - name: Harden the runner
+        uses: step-security/harden-runner@20cf305ff2072d973412fa9b1e3a4f227bda3c76 # v2.14.0
+        with:
+          egress-policy: audit
+
+      - name: Post/Update PR Comment with Download Links
+        uses: actions/github-script@ed597411d8f924073f98dfc5c65a23a2325f34cd # v8.0.0
+        with:
+          script: |
+            const owner = context.repo.owner;
+            const repo = context.repo.repo;
+            const prNumber = context.issue.number;
+            const runId = context.runId;
+
+            // Fetch artifacts for this workflow run
+            const { data: artifactsList } = await github.rest.actions.listWorkflowRunArtifacts({
+              owner,
+              repo,
+              run_id: runId
+            });
+
+            // Map of expected artifact names to display info
+            const artifactMap = {
+              'Stirling-PDF-windows-x86_64': { icon: '🪟', platform: 'Windows x64', files: '.exe, .msi' },
+              'Stirling-PDF-macos-aarch64': { icon: '🍎', platform: 'macOS ARM64', files: '.dmg' },
+              'Stirling-PDF-macos-x86_64': { icon: '🍎', platform: 'macOS Intel', files: '.dmg' },
+              'Stirling-PDF-linux-x86_64': { icon: '🐧', platform: 'Linux x64', files: '.deb, .AppImage' }
+            };
+
+            let commentBody = `## 📦 Tauri Desktop Builds Ready!\n\n`;
+            commentBody += `The desktop applications have been built and are ready for testing.\n\n`;
+            commentBody += `### Download Artifacts:\n\n`;
+
+            // Add links for each found artifact
+            let foundArtifacts = 0;
+            for (const artifact of artifactsList.artifacts) {
+              const info = artifactMap[artifact.name];
+              if (info) {
+                foundArtifacts++;
+                // GitHub doesn't provide direct download URLs via API, but we can link to the artifact on the Actions page
+                const artifactUrl = `https://github.com/${owner}/${repo}/actions/runs/${runId}/artifacts/${artifact.id}`;
+                commentBody += `${info.icon} **${info.platform}**: [Download ${artifact.name}](${artifactUrl}) `;
+                commentBody += `(${info.files}) - ${(artifact.size_in_bytes / 1024 / 1024).toFixed(1)} MB\n`;
+              }
+            }
+
+            if (foundArtifacts === 0) {
+              commentBody += `⚠️ **Warning**: No artifacts found in workflow run.\n`;
+              commentBody += `[View workflow run](https://github.com/${owner}/${repo}/actions/runs/${runId})\n`;
+            }
+
+            commentBody += `\n---\n`;
+            commentBody += `_Built from commit ${context.sha.substring(0, 7)}_\n`;
+            commentBody += `_Artifacts expire in 7 days_`;
+
+            // Find existing comment
+            const { data: comments } = await github.rest.issues.listComments({
+              owner,
+              repo,
+              issue_number: prNumber
+            });
+
+            const botComment = comments.find(comment =>
+              comment.user.type === 'Bot' &&
+              comment.body.includes('📦 Tauri Desktop Builds Ready!')
+            );
+
+            if (botComment) {
+              // Update existing comment
+              await github.rest.issues.updateComment({
+                owner,
+                repo,
+                comment_id: botComment.id,
+                body: commentBody
+              });
+              console.log('Updated existing comment');
+            } else {
+              // Create new comment
+              await github.rest.issues.createComment({
+                owner,
+                repo,
+                issue_number: prNumber,
+                body: commentBody
+              });
+              console.log('Created new comment');
+            }
+
   report:
     needs: build
     runs-on: ubuntu-latest