Extract spectrum/waterfall rendering into SpectrumView.pas

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- New unit SpectrumView.pas (TSpectrumView): encapsulates all
  spectrum, waterfall, ruler and S-meter rendering; ~900 lines
  removed from MainForm.pas
- Fix marker bug: FMarkerActive/FMarkerX were duplicated in
  MainForm and TSpectrumView — mouse handlers now write directly
  to FSpecView, stale MainForm fields removed
- Fix filter band and ruler not following VFO: add SyncSpecViewFreq
  helper called at every draw site and at top of SpectrumTimerTick
- Remove dead code: WFALL_PALETTE (34 lines), FSplitter, LblAGC,
  LblVol, WinFirewall/IntfGraphics/FPImage from uses
- Fix pre-existing bug: SidetoneFreqLo := 600 overflowed Byte,
  replaced with Hi(600)/Lo(600)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

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This commit is contained in:

ew8bak

2026-04-27 18:28:20 +03:00

co-authored by Claude Sonnet 4.6

parent 36ae140cad

commit 5421e57f9c

3 changed files with 1329 additions and 1446 deletions

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SpectrumView.pas

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