fix(ci): fix Linux artifact names and consolidate all CI fixes (#2144)

- Replace broken sslcom/esigner-codesign action with direct CodeSignTool
  jar invocation via Java (the action fails to pass credentials)
- Use staging AWS credentials for non-release branches, production for
  release branch
- Fix Linux artifact filenames: .deb uses amd64, .AppImage uses x86_64
  (not x64 as previously assumed)
- Update portal download constants to match actual .deb filename

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

Author: tofikwest

.github/workflows/device-agent-release.yml

@@ -422,16 +422,16 @@ jobs:
           aws s3 cp artifacts/CompAI-Device-Agent-${VERSION}-setup.exe \
             s3://${S3_BUCKET}/${PREFIX}/windows/latest-setup.exe
 
-          # Linux
-          aws s3 cp artifacts/CompAI-Device-Agent-${VERSION}-x64.deb \
-            s3://${S3_BUCKET}/${PREFIX}/linux/CompAI-Device-Agent-${VERSION}-x64.deb
-          aws s3 cp artifacts/CompAI-Device-Agent-${VERSION}-x64.deb \
-            s3://${S3_BUCKET}/${PREFIX}/linux/latest-x64.deb
-
-          aws s3 cp artifacts/CompAI-Device-Agent-${VERSION}-x64.AppImage \
-            s3://${S3_BUCKET}/${PREFIX}/linux/CompAI-Device-Agent-${VERSION}-x64.AppImage
-          aws s3 cp artifacts/CompAI-Device-Agent-${VERSION}-x64.AppImage \
-            s3://${S3_BUCKET}/${PREFIX}/linux/latest-x64.AppImage
+          # Linux (.deb uses amd64, .AppImage uses x86_64 architecture naming)
+          aws s3 cp artifacts/CompAI-Device-Agent-${VERSION}-amd64.deb \
+            s3://${S3_BUCKET}/${PREFIX}/linux/CompAI-Device-Agent-${VERSION}-amd64.deb
+          aws s3 cp artifacts/CompAI-Device-Agent-${VERSION}-amd64.deb \
+            s3://${S3_BUCKET}/${PREFIX}/linux/latest-amd64.deb
+
+          aws s3 cp artifacts/CompAI-Device-Agent-${VERSION}-x86_64.AppImage \
+            s3://${S3_BUCKET}/${PREFIX}/linux/CompAI-Device-Agent-${VERSION}-x86_64.AppImage
+          aws s3 cp artifacts/CompAI-Device-Agent-${VERSION}-x86_64.AppImage \
+            s3://${S3_BUCKET}/${PREFIX}/linux/latest-x86_64.AppImage
 
       - name: Upload auto-update files to S3
         env:

apps/portal/src/app/api/download-agent/constants.ts

@@ -24,8 +24,8 @@ export const DOWNLOAD_TARGETS: Record<
     contentType: 'application/octet-stream',
   },
   linux: {
-    key: `${S3_PREFIX}/linux/latest-x64.deb`,
-    filename: 'CompAI-Device-Agent-x64.deb',
+    key: `${S3_PREFIX}/linux/latest-amd64.deb`,
+    filename: 'CompAI-Device-Agent-amd64.deb',
     contentType: 'application/vnd.debian.binary-package',
   },
 };