Add NFC QR Presenter

[RogerF5-Security]

Application Submission

• Adds NFC QR Presenter as a Tools application for Flipper Zero / Momentum firmware.
• The app presents user-created local SD payloads as both an on-screen QR code and an NFC NDEF tag using the Flipper NFC stack.
• It includes local payload management from the device, catalog description, changelog, icon, and screenshots.
• It does not ship with bundled personal or demo payloads.
• Source repository: https://github.com/RogerF5-Security/NFC_QR_Presenter
• Source commit: 9fcb868460dd20fd7f9af4ea318af891715f16d2

Extra Requirements

• No extra hardware or software is required beyond a Flipper Zero with SD card storage.
• NFC sharing can be tested with an NFC-capable phone or reader.
• Payload files are created and managed by the user on the Flipper SD card under /ext/apps_data/nfc_presenter/.

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 performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have validated the manifest file(s) with python3 tools/bundle.py --nolint applications/CATEGORY/APPID/manifest.yml bundle.zip

Validation performed:

• ufbt format
• ufbt lint
• ufbt build / APPCHK Target 7, API 87.1
• python tools/bundle.py --nolint applications/Tools/nfc_qr_presenter/manifest.yml bundle_nfc_qr_presenter.zip
• Screenshot palette check: screenshots/ss0.png..ss2.png are 512x256 RGB PNG files with exactly two colors: #000000 and #fe8a2c (qFlipper Theme.color.lightorange2)

AI usage disclosure (Fill this out):

• Partially AI assisted (clarify below which code was AI assisted and briefly explain what it does).
• Fully AI generated (explain what all the generated code does in moderate detail).

AI assistance was used during implementation and release cleanup. The assisted areas include:

• src/nfc_qr_presenter.c: menu flow, payload selection, QR share view, input handling, empty-state handling, and lifecycle fixes to avoid crashes when opening or leaving the share view.
• src/nfc_qr_storage.c: SD-card payload scanning, text/.ndef file read/write helpers, slug generation, vCard newline handling, and NDEF message generation for URL, vCard, and text payloads.
• src/nfc_qr_nfc.c: NFC worker structure for exposing the selected NDEF payload as an NTAG-style tag through the Flipper NFC stack.
• Documentation and catalog metadata: README, changelog, catalog description, and release notes.

The author provided the requirements, hardware testing feedback, final behavioral decisions, source review, and owns the final submission.

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, why did you remove the AI usage disclosure & Reviewer Checklist from the PR description template?
Restore removed parts to the PR description and fill "for PR author" ones.

[xMasterX]

Hello, the screenshots looks edited / re-encoded - they have ~240 colors and the orange is off
(255,130,0). A real qFlipper screenshot is just 2 colors, orange + black, 512x256. Please recapture
them from the qFlipper screenshot button, no edits. Thanks!

[xMasterX]

See previous comment

[RogerF5-Security]

Addressed the screenshot review feedback.

Changes made:

• Replaced screenshots/ss0.png, screenshots/ss1.png, and screenshots/ss2.png in the source repository.
• Each screenshot is now 512x256 and contains exactly two RGB colors: #000000 and #fe8a2c, matching qFlipper's black foreground and Theme.color.lightorange2 screen background.
• Updated the catalog manifest to point to the new source commit: 9fcb868460dd20fd7f9af4ea318af891715f16d2.
• Rebasing was done against latest upstream/main.

Validation performed:

• ufbt / APPCHK Target 7, API 87.1
• python tools/bundle.py --nolint applications/Tools/nfc_qr_presenter/manifest.yml bundle_nfc_qr_presenter.zip