Rename PrintCraft to PdfCraft (#174)

The app, crates, binaries, bundle id, packaging, icons, screenshots and docs are now
PdfCraft / pdfcraft (repo storytold/pdfcraft). On first launch the desktop app moves the
PrintCraft settings and crash-recovery folders to the new name, and both apps read settings
saved under the old storage key, so upgrades keep recent files, preferences and unsaved work.
The signing test fixtures keep their PrintCraft subject names (they are binary).

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

packaging/linux/flatpak/ai.storyteller.pdfcraft.yml

@@ -1,20 +1,20 @@
-# Flatpak manifest for PrintCraft, ready for a Flathub submission.
+# Flatpak manifest for PdfCraft, ready for a Flathub submission.
 #
 # Flatpak builds run offline, so the crate sources must be vendored first. From the repo root:
 #
 #   curl -fsSLO https://raw.githubusercontent.com/flatpak/flatpak-builder-tools/master/cargo/flatpak-cargo-generator.py
 #   python3 flatpak-cargo-generator.py Cargo.lock -o packaging/linux/flatpak/cargo-sources.json
-#   flatpak-builder --user --install --force-clean build-flatpak packaging/linux/flatpak/ai.storyteller.printcraft.yml
-#   flatpak run ai.storyteller.printcraft
+#   flatpak-builder --user --install --force-clean build-flatpak packaging/linux/flatpak/ai.storyteller.pdfcraft.yml
+#   flatpak run ai.storyteller.pdfcraft
 #
 # For Flathub, replace the `dir` source with a `git` source pinned to a release tag and commit.
-id: ai.storyteller.printcraft
+id: ai.storyteller.pdfcraft
 runtime: org.freedesktop.Platform
 runtime-version: '25.08'
 sdk: org.freedesktop.Sdk
 sdk-extensions:
   - org.freedesktop.Sdk.Extension.rust-stable
-command: printcraft
+command: pdfcraft
 finish-args:
   - --share=ipc
   - --socket=wayland
@@ -27,23 +27,23 @@ finish-args:
 build-options:
   append-path: /usr/lib/sdk/rust-stable/bin
 modules:
-  - name: printcraft
+  - name: pdfcraft
     buildsystem: simple
     build-options:
       env:
-        CARGO_HOME: /run/build/printcraft/cargo
+        CARGO_HOME: /run/build/pdfcraft/cargo
         CARGO_NET_OFFLINE: 'true'
     build-commands:
-      - cargo --offline build --release --locked -p printcraft
-      - install -Dm755 target/release/printcraft /app/bin/printcraft
-      - install -Dm644 packaging/linux/ai.storyteller.printcraft.desktop /app/share/applications/ai.storyteller.printcraft.desktop
-      - install -Dm644 packaging/linux/ai.storyteller.printcraft.mime.xml /app/share/mime/packages/ai.storyteller.printcraft.xml
+      - cargo --offline build --release --locked -p pdfcraft
+      - install -Dm755 target/release/pdfcraft /app/bin/pdfcraft
+      - install -Dm644 packaging/linux/ai.storyteller.pdfcraft.desktop /app/share/applications/ai.storyteller.pdfcraft.desktop
+      - install -Dm644 packaging/linux/ai.storyteller.pdfcraft.mime.xml /app/share/mime/packages/ai.storyteller.pdfcraft.xml
       - mkdir -p /app/share/icons && cp -R assets/app-icon/hicolor /app/share/icons/
       - >-
         version=$(awk '/^\[/{p=($0=="[workspace.package]");next} p&&$1=="version"{gsub(/[" ]/,"",$3);print $3;exit}' Cargo.toml);
         install -d /app/share/metainfo;
         sed -e "s/@VERSION@/$version/" -e "s/@DATE@/$(date -u +%Y-%m-%d)/"
-        packaging/linux/ai.storyteller.printcraft.metainfo.xml.in > /app/share/metainfo/ai.storyteller.printcraft.metainfo.xml
+        packaging/linux/ai.storyteller.pdfcraft.metainfo.xml.in > /app/share/metainfo/ai.storyteller.pdfcraft.metainfo.xml
     sources:
       - type: dir
         path: ../../..