Add flatpak packaging

packaging/flatpak/net.jeena.Recoder.yaml

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+app-id: net.jeena.Recoder
+runtime: org.gnome.Platform
+runtime-version: "48"
+sdk: org.gnome.Sdk
+command: recoder
+
+finish-args:
+  - --filesystem=home
+  - --filesystem=/mnt
+  - --filesystem=/media
+  - --filesystem=/run/media
+  - --filesystem=xdg-data/sounds:ro
+  - --filesystem=~/.local/share/sounds/recoder:ro
+  - --socket=wayland
+  - --socket=x11
+  - --socket=pulseaudio
+  - --talk-name=org.freedesktop.Notifications
+  - --env=GSETTINGS_SCHEMA_DIR=/app/share/glib-2.0/schemas
+  - --device=dri
+
+add-extensions:
+  org.freedesktop.Platform.ffmpeg-full:
+    version: "24.08"
+    directory: lib/ffmpeg
+    add-ld-path: .
+
+modules:
+  - name: recoder
+    buildsystem: simple
+    builddir: true
+    sources:
+      - type: dir
+        path: ../../
+    build-commands:
+      - glib-compile-resources src/resources/resources.xml --target=src/recoder/resources.gresource --sourcedir=src/resources
+      - pip3 install --prefix=/app --no-deps --no-build-isolation .
+      - install -Dm644 src/resources/net.jeena.Recoder.desktop /app/share/applications/net.jeena.Recoder.desktop
+      - install -Dm644 src/resources/net.jeena.Recoder.svg /app/share/icons/hicolor/scalable/apps/net.jeena.Recoder.svg
+      - install -Dm644 src/resources/net.jeena.recoder.gschema.xml /app/share/glib-2.0/schemas/net.jeena.recoder.gschema.xml
+      - install -Dm644 src/resources/complete.oga /app/share/sounds/complete.oga
+      - install -Dm644 src/resources/net.jeena.Recoder.metainfo.xml /app/share/metainfo/net.jeena.Recoder.metainfo.xml
+      - glib-compile-schemas /app/share/glib-2.0/schemas

packaging/flatpak/release-flatpak.sh

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+#!/usr/bin/env bash
+set -euo pipefail
+
+APP_ID="net.jeena.Recoder"
+MANIFEST="${APP_ID}.yaml"
+REPO_DIR="repo"
+BRANCH="gh-pages"
+WORKTREE_DIR="../../gh-pages"
+PUBLISH_SUBDIR="flatpak-repo"
+GPG_KEY_ID="1DF6570C929E2C186685046F0D6A8E36B9EE6177"
+
+# Clean previous build
+rm -rf build-dir "${REPO_DIR}"
+
+# Build Flatpak and create signed repo
+flatpak-builder --force-clean \
+  --repo="${REPO_DIR}" \
+  --default-branch=stable \
+  --gpg-sign="${GPG_KEY_ID}" \
+  build-dir "${MANIFEST}"
+
+# Export public key into repo (also used below for flatpakref)
+gpg --export --armor "${GPG_KEY_ID}" > "${REPO_DIR}/gpg.key"
+
+# Clean up existing worktree if any
+if [ -d "${WORKTREE_DIR}" ]; then
+  echo "Removing existing worktree at ${WORKTREE_DIR}..."
+  git worktree remove --force "${WORKTREE_DIR}"
+  rm -rf "${WORKTREE_DIR}"
+fi
+
+# Prepare gh-pages worktree
+git fetch origin "${BRANCH}" || true
+git worktree add -B "${BRANCH}" "${WORKTREE_DIR}" "origin/${BRANCH}"
+
+# Clear just the publish subdir inside the worktree
+rm -rf "${WORKTREE_DIR:?}/${PUBLISH_SUBDIR}"
+mkdir -p "${WORKTREE_DIR}/${PUBLISH_SUBDIR}"
+
+# Copy repo files into the publish subdir
+cp -r "${REPO_DIR}/"* "${WORKTREE_DIR}/${PUBLISH_SUBDIR}/"
+
+# Generate .flatpakref inside worktree root
+cat > "${WORKTREE_DIR}/${APP_ID}.flatpakref" <<EOF
+[Flatpak Ref]
+Title=Recoder
+Name=${APP_ID}
+Branch=stable
+Url=https://jeena.github.io/recoder/${PUBLISH_SUBDIR}
+IsRuntime=false
+RuntimeRepo=https://flathub.org/repo/flathub.flatpakrepo
+GPGKey=$(base64 -w0 < "${REPO_DIR}/gpg.key")
+EOF
+
+# Get version
+VERSION=$(python3 -c 'import toml; print(toml.load("../../pyproject.toml")["project"]["version"])')
+
+# Commit and push only the publish subdir and flatpakref
+pushd "${WORKTREE_DIR}" > /dev/null
+git add "${PUBLISH_SUBDIR}" "${APP_ID}.flatpakref"
+git commit -m "Update Flatpak release to version ${VERSION}" || echo "No changes to commit"
+git push origin "${BRANCH}"
+popd > /dev/null
+
+# Clean up worktree
+git worktree remove "${WORKTREE_DIR}"
+
+echo "✅ Release uploaded to GitHub Pages with GPG signing!"