Decode QR codes and barcodes in text capture

[x1xhlol]

Summary

Extends the text-capture flow (Ctrl/Cmd+Shift+T) with QR code and barcode recognition: if the selected area contains a QR code or barcode, its decoded payload is copied to the clipboard instead of running OCR. No code found → falls back to OCR exactly as before.

• New barcode module using rxing (Rust port of ZXing — free, on-device, supports QR plus the common 1D/2D barcode formats), decoding with TryHarder on the captured region's luma data.
• capture_ocr_text tries the barcode decode first (on a blocking task), and only falls back to OCR when nothing is found:

  capture region in-memory → decode QR/barcode
     ├─ payload found → clipboard
     └─ none → native OCR → clipboard
  

• No new UI or settings: same shortcut, same selector, same default-off screenshot/notification toggles.

Builds on #2095 (OCR text capture); the barcode change itself is the top commit.

Showcase

Select a QR code and its payload is on the clipboard, ready to paste:

Testing (Windows, end-to-end on a live dev build)

Test	Result
QR-only selection → clipboard = exact payload	✅
QR + surrounding caption text → payload wins over OCR	✅
Text-only selection → OCR fallback (exact text match)	✅
No click-blocking overlay left after capture	✅
Regression: normal screenshot flow unaffected	✅

macOS compiles the same path (the decoder is pure Rust, platform-independent); runtime-tested on Windows only.

Greptile Summary

The PR adds barcode and QR decoding ahead of native OCR in the desktop text-capture flow.

• Adds an on-device rxing decoder and copies decoded payloads directly to the clipboard.
• Adds OCR-area target selection, a default global shortcut, persisted capture preferences, and the corresponding Rust/TypeScript IPC wiring.
• Retains native OCR as the fallback when no barcode payload is found.

Confidence Score: 4/5

The PR appears safe to merge, with only a non-blocking redundant comment to remove.

The barcode-first capture path retains OCR fallback behavior, keeps persisted fields backward-compatible, and coordinates overlay cleanup across success and failure paths; the only accepted concern is comment-policy compliance.

Files Needing Attention: apps/desktop/src-tauri/src/barcode.rs

Important Files Changed

Filename	Overview
apps/desktop/src-tauri/src/barcode.rs	Adds luma-based barcode decoding through rxing; contains one redundant doc comment.
apps/desktop/src-tauri/src/recording.rs	Adds barcode-first text capture with blocking decode work, native OCR fallback, clipboard output, and capture-window handling.
apps/desktop/src-tauri/src/hotkeys.rs	Adds the OCR-area action and conflict-aware one-time default shortcut seeding.
apps/desktop/src/routes/target-select-overlay.tsx	Extends area selection with OCR capture and explicit overlay cleanup and error restoration.
apps/desktop/src/utils/tauri.ts	Updates generated bindings to match the new Rust commands, target mode, settings, and hotkey action.
apps/desktop/src-tauri/src/general_settings.rs	Adds backward-compatible default-off settings for retaining OCR screenshots and showing notifications.

Prompt To Fix All With AI

### Issue 1
apps/desktop/src-tauri/src/barcode.rs:3
**Redundant barcode helper comment**

This comment only restates that `decode_barcode` decodes a barcode and returns text, adding maintenance noise without documenting a non-obvious invariant or rationale.

```suggestion

```

---

For each issue above, determine whether it is valid and should be fixed. If so, fix it directly.

_{Reviews (1): Last reviewed commit: "Decode QR codes and barcodes in text cap..." | Re-trigger Greptile}

Greptile also left 1 inline comment on this PR.

Context used (3)

• Context used - AGENTS.md (source)
• Knowledge Base — Desktop Tauri App (Rust Backend)
• Knowledge Base — Desktop Frontend (apps/desktop/src)

[socket-security]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	cargo/​rxing@​0.9.2
	cargo/​regex@​1.13.1
	cargo/​regex-automata@​0.4.18
	cargo/​regex-syntax@​0.8.11

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