fix: replace mislav/bump-homebrew-formula-action with custom multi-platform formula generator

The action only supports single-URL formulas. Our formula has 3 platform-specific
URLs (aarch64-mac, x86_64-mac, x86_64-linux), so the tap was never updated correctly.

Author: vinhnxv

.github/workflows/release.yml

@@ -67,11 +67,67 @@ jobs:
     needs: release
     runs-on: ubuntu-latest
     steps:
-      - name: Update Homebrew tap
-        uses: mislav/bump-homebrew-formula-action@v3
-        with:
-          formula-name: melina
-          homebrew-tap: vinhnxv/homebrew-tap
-          download-url: https://github.com/vinhnxv/melina/releases/download/${{ github.ref_name }}/melina-${{ github.ref_name }}-aarch64-apple-darwin.tar.gz
+      - name: Download tarballs and compute SHA256
+        env:
+          TAG: ${{ github.ref_name }}
+        run: |
+          BASE="https://github.com/vinhnxv/melina/releases/download/${TAG}"
+          for target in aarch64-apple-darwin x86_64-apple-darwin x86_64-unknown-linux-gnu; do
+            curl -sL "${BASE}/melina-${TAG}-${target}.tar.gz" -o "${target}.tar.gz"
+          done
+          echo "SHA_AARCH64_MAC=$(sha256sum aarch64-apple-darwin.tar.gz | cut -d' ' -f1)" >> "$GITHUB_ENV"
+          echo "SHA_X86_64_MAC=$(sha256sum x86_64-apple-darwin.tar.gz | cut -d' ' -f1)" >> "$GITHUB_ENV"
+          echo "SHA_X86_64_LINUX=$(sha256sum x86_64-unknown-linux-gnu.tar.gz | cut -d' ' -f1)" >> "$GITHUB_ENV"
+          echo "VERSION=${TAG#v}" >> "$GITHUB_ENV"
+
+      - name: Generate and push Homebrew formula
         env:
-          COMMITTER_TOKEN: ${{ secrets.HOMEBREW_TAP_TOKEN }}
+          GH_TOKEN: ${{ secrets.HOMEBREW_TAP_TOKEN }}
+          TAG: ${{ github.ref_name }}
+        run: |
+          cat > formula.rb <<FORMULA
+          class Melina < Formula
+            desc "Claude Code process monitor — track sessions, teammates, MCP servers, and orphans"
+            homepage "https://github.com/vinhnxv/melina"
+            version "${VERSION}"
+            license "MIT"
+
+            on_macos do
+              on_arm do
+                url "https://github.com/vinhnxv/melina/releases/download/${TAG}/melina-${TAG}-aarch64-apple-darwin.tar.gz"
+                sha256 "${SHA_AARCH64_MAC}"
+              end
+              on_intel do
+                url "https://github.com/vinhnxv/melina/releases/download/${TAG}/melina-${TAG}-x86_64-apple-darwin.tar.gz"
+                sha256 "${SHA_X86_64_MAC}"
+              end
+            end
+
+            on_linux do
+              on_intel do
+                url "https://github.com/vinhnxv/melina/releases/download/${TAG}/melina-${TAG}-x86_64-unknown-linux-gnu.tar.gz"
+                sha256 "${SHA_X86_64_LINUX}"
+              end
+            end
+
+            def install
+              bin.install "melina"
+              bin.install "melina-cli"
+            end
+
+            test do
+              system bin/"melina-cli", "--help"
+            end
+          end
+          FORMULA
+
+          # Remove leading whitespace from heredoc
+          sed -i 's/^          //' formula.rb
+
+          FILE_SHA=$(gh api repos/vinhnxv/homebrew-tap/contents/Formula/melina.rb --jq '.sha')
+
+          gh api repos/vinhnxv/homebrew-tap/contents/Formula/melina.rb \
+            -X PUT \
+            -f message="melina ${VERSION}" \
+            -f content="$(base64 -w0 < formula.rb)" \
+            -f sha="$FILE_SHA"