r-zakarya c5fe26ce94 feat: chunked file save + export progress spinner + password-reveal + avatar size ...

Large file save (fixes black screen on big attachment download / export)
- Bridge.saveFile streams anything over ~1MB base64 in chunks through the
  cmd:// channel instead of stuffing the whole payload in one URL — a
  multi-MB base64 URL blew past WebView2's ~2MB navigation cap and blanked
  the document (black screen). Small payloads keep the single-shot path.
- Chunks are sent sequentially (each acked via Bridge.onFileChunkAck
  before the next) so repeated location.href assignments don't coalesce.
- Delphi accumulates chunks per reqId in a TStringBuilder
  (FFileSaveChunks), commits on file/save-commit, and shares the
  decode+dialog+write logic with the single-shot path via SaveDecodedFile.
- Chunk size 1MB → far fewer round-trips (a 20MB export dropped from ~67
  to ~27 hops).

Busy overlay + progress
- Global spinner overlay (showBusy/updateBusy/hideBusy). doExport shows it
  immediately on click — BEFORE the entry-decrypt + attachment-fetch loop
  that is the real cost — with a 0ms yield so it paints before the thread
  blocks (was appearing 3-5s late). Phases: "Reading vault… N/total" →
  "Encrypting export…" → "Preparing file… N%" (real chunk progress).
  Attachment download shows the same for files > 512KB.
- Spinner ring used an undefined --bg-elev-3 (invalid border → invisible);
  switched to --border. Fixed a second stale --bg-elev-3 use on the
  settings-search clear button hover.

Password reveal
- promptDialog gets an eye toggle in password mode, so every encrypted
  prompt (export, import, backup password, recovery code, sync password)
  can show/hide the typed value.

Avatar
- Top-right chip avatar enlarged 22px → 30px with the chip padding
  rebalanced.

Rebuild: BuildAssets + F9 (UMainForm.pas changed for the chunk handlers).

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

2026-07-03 16:56:47 +01:00

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