Add FlipDeck - USB HID Macro Pad

[ismail-oe]

Application Submission

FlipDeck turns your Flipper Zero into a USB HID macro pad with a 2×3 button grid.

Features:

• Multi-page support (up to 8 pages × 6 buttons) with named page headers and dot indicators
• Native media keys: Play/Pause, Next, Previous, Volume Up/Down, Mute, Brightness — work instantly on any OS without drivers or host software
• Custom F-keys (F13–F24) for triggering host-side actions via optional companion daemon
• Page navigation: left/right at grid edge switches pages, short Back = previous page, long Back = exit
• Haptic and visual feedback on button press
• Configurable button layout via SD card config file (/ext/apps_data/flipdeck/config.txt)
• Optional cross-platform host companion (macOS + Linux) with web UI, plugin system, and background service

Extra Requirements

For media keys (Play, Volume, Mute, etc.): No extra hardware or software required. Works out of the box via USB.

For custom F-key actions (optional): Requires the FlipDeck Host companion installed on the computer:

• Python 3.9+
• macOS: Accessibility permission for Terminal/Python
• Linux: xdotool for keypress simulation

Host companion installation: cd host && pip install -e .

Author Checklist (Fill this out)

• I've read the contribution guidelines and my PR follows them
• I own the code I'm submitting or have code owner's permission to submit it
• I have validated the manifest file(s) with python3 tools/bundle.py --nolint applications/USB/flipdeck/manifest.yml bundle.zip

Reviewer Checklist (Don't fill this out)

• Bundle is valid
• There are no obvious issues with the source code
• I've ran this application and verified its functionality

[xMasterX]

Hello, your manifest file is invalid
App seems to be located not in repo's root, but in flipper folder
So you need to add subdir: flipper after commit_sha field in manifest