ci: add Gitea Actions workflows (build/CI + release) modeled after gostations and grokkit

- build.yml: CI on push/PR with Go 1.24.2, test-short via Makefile, Linux build, verify binary (go mod tidy to ensure clean sums for deps like lipgloss/bubbletea)
- release.yml: on v* tags, cross build via make cross (with VERSION/COMMIT/DATE ldflags), prepare tar.gz + checksums (gralculator-*), conditional install scripts, create Gitea release via API (RELEASE_TOKEN), upload assets. Customized release notes for this TUI calculator project.
- Very close structure, caching, tidy steps, asset prep, and release creation/upload logic to the reference projects.
- Uses our existing Makefile cross target and internal/version ldflags.
- No external ci-build.sh needed; leverages Makefile directly for simplicity.

.gitea/workflows/build.yml

@@ -0,0 +1,68 @@
+name: CI
+
+on: [push, pull_request]
+
+jobs:
+  test:
+    name: Test
+    runs-on: ubuntu-gitea
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: '1.24.2'
+
+      - name: Cache Go modules
+        uses: actions/cache@v4
+        with:
+          path: ~/go/pkg/mod
+          key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+          restore-keys: |
+            ${{ runner.os }}-go-
+
+      - name: Download dependencies
+        run: go mod download
+
+      - name: Run tests (short)
+        run: |
+          go mod tidy
+          make test-short
+        # go mod tidy ensures go.sum is complete (fixes "missing go.sum entry" for deps during `go test`)
+
+  build:
+    name: Build
+    runs-on: ubuntu-gitea
+    needs: [test]
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: '1.24.2'
+
+      - name: Cache Go modules
+        uses: actions/cache@v4
+        with:
+          path: ~/go/pkg/mod
+          key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+          restore-keys: |
+            ${{ runner.os }}-go-
+
+      - name: Download dependencies
+        run: go mod download
+
+      - name: Linux Build
+        run: |
+          go mod tidy
+          make build
+        # go mod tidy ensures go.sum is fully populated for this Go version before the make build / go build
+
+      - name: Verify binary
+        run: |
+          ./build/gralculator -v || true
+          ls -lh build/gralculator || true

.gitea/workflows/release.yml

@@ -0,0 +1,123 @@
+name: Release
+
+on:
+  push:
+    tags:
+      - 'v*'
+
+permissions:
+  contents: write
+
+jobs:
+  release:
+    name: Create Release
+    runs-on: ubuntu-gitea
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: '1.24.2'
+
+      - name: Cache Go modules
+        uses: actions/cache@v4
+        with:
+          path: ~/go/pkg/mod
+          key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+          restore-keys: |
+            ${{ runner.os }}-go-
+
+      - name: Download Go modules
+        run: go mod download
+
+      - name: Build for multiple platforms
+        shell: bash
+        run: |
+          VERSION=${GITHUB_REF#refs/tags/}
+          COMMIT=$(git rev-parse --short HEAD)
+          DATE=$(date -u +%Y-%m-%dT%H:%M:%SZ)
+          go mod tidy
+          make cross VERSION="$VERSION" COMMIT="$COMMIT" DATE="$DATE"
+        # go mod tidy ensures go.sum is complete for this Go version in CI (common fix for "missing go.sum entry" during cross builds)
+        # make cross (with deps) handles the loop + ldflags
+
+      - name: Prepare assets
+        shell: bash
+        run: |
+          VERSION=${GITHUB_REF#refs/tags/}
+          for bin in build/gralculator-* ; do
+            if [ ! -f "$bin" ]; then continue; fi
+            OSARCH=$(basename "$bin" | sed 's/gralculator-//' | sed 's/\.exe$//')
+            tar czf "build/gralculator-${OSARCH}-${VERSION}.tar.gz" -C build "$(basename "$bin")"
+          done
+          sha256sum build/gralculator-*.tar.gz | tee build/checksums.txt
+
+          # Include useful scripts from repo (if present)
+          [ -f scripts/gralculator-install.sh ] && cp scripts/gralculator-install.sh build/
+          [ -f scripts/gralculator-install.ps1 ] && cp scripts/gralculator-install.ps1 build/
+
+          # Clean raw binaries (we ship the tarballs)
+          for plat in 'linux/amd64' 'linux/arm64' 'darwin/amd64' 'darwin/arm64' 'windows/amd64'; do
+            OS=$(echo "$plat" | cut -d/ -f1)
+            ARCH=$(echo "$plat" | cut -d/ -f2)
+            BIN="gralculator-${OS}-${ARCH}"
+            if [ "$OS" = "windows" ]; then BIN="${BIN}.exe"; fi
+            rm -f "build/${BIN}"
+          done
+
+      - name: Install dependencies
+        run: apt update && apt install -y jq
+
+      - name: Create Release & Upload Assets
+        shell: bash
+        env:
+          GITEA_TOKEN: ${{ secrets.RELEASE_TOKEN }}
+        run: |
+          set -euo pipefail
+
+          VERSION=${GITHUB_REF#refs/tags/}
+          GITEA_API=https://repos.gmgauthier.com/api/v1
+          REPO=${GITHUB_REPOSITORY}
+
+          echo "Creating release for tag ${VERSION} on ${REPO}..."
+
+          curl --fail --silent --show-error -X POST "${GITEA_API}/repos/${REPO}/releases" \
+            -H "Authorization: token ${GITEA_TOKEN}" \
+            -H "Content-Type: application/json" \
+            -d "{
+              \"tag_name\": \"${VERSION}\",
+              \"name\": \"gralculator ${VERSION}\",
+              \"target\": \"${GITHUB_SHA}\",
+              \"draft\": false,
+              \"body\": \"## Quick Start\n\nDownload the appropriate archive for your platform, extract the gralculator binary, and run it.\n\n\`\`\`bash\n./gralculator\n\`\`\`\n\nFeatures a wide integrated display with base cycling (Tab), MOD support, CERR on non-integer base switches, and a tactile keypad.\n\nPlatform binaries (tar.gz) + checksums.txt are attached. See README.md (when present) and the design docs for details.\"
+            }" > release.json
+
+          echo "Release creation response:"
+          cat release.json
+
+          RELEASE_ID=$(jq -r '.id // empty' release.json)
+
+          if [ -z "$RELEASE_ID" ]; then
+            echo "ERROR: Failed to create release. No release ID returned. Check the response above and your RELEASE_TOKEN secret (must have 'repo' scope and write access)."
+            exit 1
+          fi
+
+          echo "Release created with ID: $RELEASE_ID"
+
+          for asset in build/* ; do
+            name=$(basename "$asset")
+            mime="application/octet-stream"
+            [[ "$name" =~ \.tar\.gz$ ]] && mime="application/gzip"
+            [[ "$name" =~ \.(txt|sh|ps1)$ ]] && mime="text/plain"
+            echo "Uploading asset: $name"
+            curl --fail --silent --show-error -X POST "${GITEA_API}/repos/${REPO}/releases/${RELEASE_ID}/assets?name=${name}" \
+              -H "Authorization: token ${GITEA_TOKEN}" \
+              -H "Content-Type: ${mime}" \
+              --data-binary "@$asset"
+          done
+
+          echo "All assets uploaded successfully."