ci(release): publish signed updater assets alongside tarball

After packaging, stage the bare AniTrack-linux-amd64 binary (the updater swaps os.Executable in place; the user tarball single top-level directory would fail the single-entry rule), sign it with wails3 updater sign using UPDATER_SIGNING_KEY (missing secret is a hard error, key shredded after use), split the output into .sha512/.sig sidecars, and extend the idempotent replace-upload loop from 1 asset to all 4. Tarball flow untouched; rc tags get signed assets too, which the beta-channel live proof needs.

.gitea/workflows/release.yml

@@ -245,7 +245,38 @@ jobs:
             echo "Created new release for ${TAG}"
           fi
 
-      - name: Upload release archive
+      - name: Build updater asset and sign
+        env:
+          UPDATER_SIGNING_KEY: ${{ secrets.UPDATER_SIGNING_KEY }}
+        run: |
+          set -euo pipefail
+          : "${VERSION:?VERSION missing from version-guard step}"
+          export PATH="${HOME}/go/bin:${PATH}"
+          : "${UPDATER_SIGNING_KEY:?Missing secret UPDATER_SIGNING_KEY. Add the updater private key under Settings → Secrets → Actions.}"
+          # Bare updater binary: the updater swaps os.Executable() in place,
+          # so it takes the single binary, not the user tarball (whose
+          # top-level directory would fail the single-entry rule).
+          mkdir -p updater-dist
+          cp build/bin/AniTrack updater-dist/AniTrack-linux-amd64
+          printf '%s' "${UPDATER_SIGNING_KEY}" > updater-dist/updater.key
+          chmod 600 updater-dist/updater.key
+          wails3 updater sign -key updater-dist/updater.key updater-dist/AniTrack-linux-amd64 > updater-dist/sign.json
+          # Split the sign output into the sidecar assets the Gitea provider
+          # fetches: <name>.sha512 (sha512sum format) + <name>.sig (base64).
+          python3 - <<'EOF'
+          import base64, binascii, json
+          entries = json.load(open('updater-dist/sign.json'))
+          entry = next(e for e in entries if e['filename'].endswith('AniTrack-linux-amd64'))
+          assert entry['digestAlgo'] == 'sha512', entry
+          assert entry['signatureAlgo'] == 'ed25519ph', entry
+          digest_hex = binascii.hexlify(base64.b64decode(entry['digest'])).decode()
+          open('updater-dist/AniTrack-linux-amd64.sha512', 'w').write(f"{digest_hex}  AniTrack-linux-amd64\n")
+          open('updater-dist/AniTrack-linux-amd64.sig', 'w').write(entry['signature'].strip() + '\n')
+          EOF
+          shred -u updater-dist/updater.key
+          ls -la updater-dist/
+
+      - name: Upload release assets
         env:
           TOKEN: ${{ secrets.REGISTRY_TOKEN }}
           REPO: ${{ gitea.repository }}
@@ -255,7 +286,8 @@ jobs:
           : "${ARCHIVE:?ARCHIVE missing from packaging step}"
           API="https://git.linuxhg.com/api/v1/repos/${REPO}/releases"
           AUTH="Authorization: token ${TOKEN}"
-          test -f "${ARCHIVE}" || { echo "::error::${ARCHIVE} not found" >&2; exit 1; }
+          for ASSET in "${ARCHIVE}" updater-dist/AniTrack-linux-amd64 updater-dist/AniTrack-linux-amd64.sha512 updater-dist/AniTrack-linux-amd64.sig; do
+            test -f "${ASSET}" || { echo "::error::${ASSET} not found" >&2; exit 1; }
 
             RID="$(curl -sS -H "${AUTH}" "${API}/tags/${TAG}" | jq -r '.id // empty')"
             if [ -z "${RID}" ]; then
@@ -264,18 +296,20 @@ jobs:
             fi
 
             # Replace a same-named asset so re-runs stay idempotent.
-          AID="$(curl -sS -H "${AUTH}" "${API}/${RID}/assets" | jq -r --arg n "${ARCHIVE}" '.[] | select(.name==$n) | .id // empty')"
+            ANAME="$(basename "${ASSET}")"
+            AID="$(curl -sS -H "${AUTH}" "${API}/${RID}/assets" | jq -r --arg n "${ANAME}" '.[] | select(.name==$n) | .id // empty')"
             if [ -n "${AID}" ]; then
               curl -sS -X DELETE -H "${AUTH}" "${API}/${RID}/assets/${AID}" >/dev/null
-            echo "Deleted existing asset id=${AID} (${ARCHIVE})"
+              echo "Deleted existing asset id=${AID} (${ANAME})"
             fi
 
             resp="$(curl -sS -w '\n%{http_code}' -X POST -H "${AUTH}" \
-            -F "attachment=@${ARCHIVE}" "${API}/${RID}/assets?name=${ARCHIVE}")"
+              -F "attachment=@${ASSET}" "${API}/${RID}/assets?name=${ANAME}")"
             code="$(printf '%s' "${resp}" | tail -n1)"
             rbody="$(printf '%s' "${resp}" | sed '$d')"
             if [ "${code}" -ge 400 ]; then
               echo "::error::Asset upload ${code}: ${rbody}" >&2
               exit 1
             fi
-          echo "Uploaded ${ARCHIVE} to release id=${RID}"
+            echo "Uploaded ${ANAME} to release id=${RID}"
+          done