…+ Save As) (#3130)

## Summary

First user-facing surface of the theming subsystem. Operators can now
edit any colour token in the active theme and ship a custom theme to
disk, all without touching a JSON file.

**View → Theme Editor…** opens a modeless dialog with:

- "Editing: \<active theme\>" header
- Filter bar — type-to-match against dotted token names (e.g.
\`accent\`, \`slice\`, \`meter\`)
- Sorted list of every colour token with a 16×16 swatch + hex value per
row
- Click row → \`QColorDialog\` opens seeded with the current value
- Accept → \`ThemeManager::setColor()\` → emits \`themeChanged\` → every
widget registered through \`applyStyleSheet\` repaints on the next
event-loop turn. **No restart**.
- "Save As…" prompts for a theme name and writes the current tokens to
\`~/.config/AetherSDR/themes/\<name\>.json\` via
\`saveCurrentThemeAs()\`. The new theme is registered + made active
immediately.

## ThemeManager additions

| Method | Purpose |
|---|---|
| \`allTokenKeys()\` | Sorted enumeration of every loaded token — used
by the editor to populate its list. |
| \`setColor(token, color)\` | In-memory mutation + themeChanged. Hex
round-trip so \`cssFragment()\` / \`resolve()\` pick up the new value
the same way they pick up loaded tokens. No-op on a same-value write. |
| \`setSizing(token, int)\` | Integer-token equivalent for panel padding
/ border widths. Not yet exposed in the editor UI; will land in PR 2
alongside font/sizing surface. |
| \`saveCurrentThemeAs(name)\` | Rebuilds nested JSON from the flat
dotted-key map (so on-disk shape matches bundled themes), writes to user
themes dir, registers + activates. Handles QString/int/double/bool
scalars + full \`ThemeGradient\` round-trip so the waterfall colormap
and slice.dim tokens persist correctly. |

## Explicitly NOT in this PR (deferred to Phase 5 PR 2-4)

1. **Inspector mode** (click-on-widget to find tokens that paint it).
\`ThemeManager::tokensForWidget()\` already exposes the reverse-map
populated by \`applyStyleSheet\`; wiring is a few hundred lines once we
settle on the latch/unlatch UX. Probably matches the AetherControl
double-click convention (#3103).
2. **Gradient editing** for
\`waterfall.colormap.{default,grayscale,fire,…}\` and
\`slice.dim.{a..h}\`. The list filters them out via the
\`brush().gradient()\` probe so they don't render as
misleading-first-stop swatches.
3. **Font / sizing editing** — same Phase 5 PR 2 surface as the
inspector mode.
4. **Import** (file picker for arbitrary JSON), drag-and-drop, theme
deletion, theme renaming.

## Build verified clean

- [x] AetherSDR builds clean
- [x] All 320 targets including every test target

## Phase status

| Phase | Item | Status |
|---|---|---|
| 1 | ThemeManager scaffolding + JSON loader | ✅ |
| 2 | Gradient tokens + applyStyleSheet reverse-map + mass migration | ✅
|
| 3 | Paint-code migration + canonical-table closeout | ✅ |
| 4 | Default Light theme | ⏳ (#3129, in review) |
| **5** | **Editor UI (PR 1: live colour editing + Save As)** | **this
PR** |

## Test plan

- [ ] CI: build / check-paths / check-windows / CodeQL
- [ ] Visual smoke:
  - [ ] View → Theme Editor… opens the modeless dialog
  - [ ] Title shows "Editing: Default Dark" (or whatever's active)
  - [ ] Filter bar — type \`accent\` → only accent.* rows visible
- [ ] Click an accent row → QColorDialog opens, pick a wild hue, accept
→ that colour appears immediately wherever \`color.accent\` paints (most
buttons, slider handles, badges)
  - [ ] Save As… → name it "Test", confirm:
    - File written to \`~/.config/AetherSDR/themes/Test.json\`
    - Title bar updates to "Editing: Test"
    - View → Theme submenu (from #3129) now lists "Test"
- [ ] Switch back to Default Dark via the View menu → original colours
restored, custom edits gone (file on disk preserved)
- [ ] Reopen Test from the menu → custom edits restored from the saved
file

73, Jeremy KK7GWY & Claude (AI dev partner)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

---------

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

…3129)

## Summary

The final Phase 4 milestone for the theming subsystem — every
load-bearing colour decision in the GUI now flows through the token
system, so authoring a second theme is purely a JSON exercise.

## What Default Light is

Daylight-readable variant of the canonical taxonomy. Backgrounds invert
(panel ramp goes light→dark for elevation), text colours invert (primary
text now dark on light), accents darken to maintain contrast against the
light canvas. Slice and meter colours keep semantic meaning but shift
toward the darker / more-saturated end of their hue family so they read
clearly on the light background.

## Design choices, by category

| Category | Approach |
|---|---|
| **Backgrounds** | Light at the base (\`#f5f5f8\`), darker with
elevation (\`#b0bcc8\` at the highest tier). \`background.tx\` warms to
\`#ffeacc\` to preserve "transmit zone" feel. \`background.spectrum\`
flips to pure white. |
| **Accents** | Pulled toward the darker end of each hue family. Cyan
\`#00b4d8\` → \`#0088b0\`; warning amber → \`#d08010\`; danger red →
\`#c02020\`; success green → \`#1a8040\`. |
| **Text** | Full inversion of the dark ramp. primary \`#c8d8e8\` →
\`#1a2a3a\`; secondary / label / disabled shift accordingly. |
| **Borders** | Light grey at subtle, medium grey at strong. TX border
keeps the warm cast: \`#5a4a28\` → \`#b08840\`. |
| **Meters** | Semantic colours preserved (red crest, cyan rms, amber
threshold, gold GR). All darkened for contrast on the light meter
background. \`peak\` reads dark on light instead of near-white. |
| **Spectrum** | trace / peakHold / average shift to darker tones. grid
lightens to \`#d0d8e0\` so it stays visible-but-subtle on the white
canvas. |
| **Waterfall** | Colormap gradients **UNCHANGED** across all 5 presets.
The waterfall renders OPAQUE pixels from a heatmap; canvas underneath
doesn't show through. Same Default / Grayscale / Blue-Green / Fire /
Plasma in both themes. |
| **Slice** | Active hues stay distinct (cyan / magenta / green / yellow
/ orange / teal / coral / lavender) but shift toward saturated
mid-tones. Dim variants become **washed-out light pastels** instead of
half-brightness saturated versions — they sit visibly above the light
background without being attention-grabbing. |

## Wiring

- \`resources/themes/default-light.json\` — new file, 152 lines.
- \`resources/resources.qrc\` — one-line entry registering the new theme
as \`:/themes/default-light.json\`.

No C++ changes needed. \`ThemeManager::scanAvailableThemes()\` already
auto-discovers any \`*.json\` in \`:/themes/\` at startup, so the new
theme appears in \`availableThemes()\` and is settable via
\`setActiveTheme(\"Default Light\")\`. All widgets that registered
through \`ThemeManager::applyStyleSheet\` (50+ sites from the Phase 2/3
migration) live-re-theme automatically. Slice indicators, waterfall
colormaps, FFT background fill, primary sliders — all flip on the next
paint.

## Build verified clean

- [x] AetherSDR builds clean
- [x] All 320 targets including every test target
- [x] Both themes appear in the generated qrc_resources.cpp

## Phase 4 status — complete

| Item | PR |
|---|---|
| Slice indicators runtime themed | aethersdr#3121 ✅ |
| Waterfall colormap runtime themed | aethersdr#3122 ✅ |
| **Default Light theme** | **this PR** ✅ |

Phase 5 picks up the theme editor UI (modeless dialog with inspector
mode), import/export, and custom-theme persistence in
\`~/.config/AetherSDR/themes/\`.

## Test plan

- [ ] CI: build / check-paths / check-windows / CodeQL
- [ ] Visual smoke: launch the app, open Settings → switch active theme
to "Default Light", confirm:
  - [ ] Panels invert correctly (light backgrounds, dark text)
- [ ] Spectrum widget renders with a white canvas, dark FFT trace, light
grid lines
  - [ ] Waterfall colormap unchanged (still black→…→hot)
  - [ ] All 8 slice indicators readable on the light spectrum
- [ ] Primary sliders (sub-page fill + light handle) still visible with
darker accent fill
  - [ ] Strip panels' amber-sub-page sliders still TX-coloured
- [ ] Bonus: switch back to "Default Dark" — every widget should snap
back without restart

73, Jeremy KK7GWY & Claude (AI dev partner)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

---------

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

…+ Save As) (aethersdr#3130)

## Summary

First user-facing surface of the theming subsystem. Operators can now
edit any colour token in the active theme and ship a custom theme to
disk, all without touching a JSON file.

**View → Theme Editor…** opens a modeless dialog with:

- "Editing: \<active theme\>" header
- Filter bar — type-to-match against dotted token names (e.g.
\`accent\`, \`slice\`, \`meter\`)
- Sorted list of every colour token with a 16×16 swatch + hex value per
row
- Click row → \`QColorDialog\` opens seeded with the current value
- Accept → \`ThemeManager::setColor()\` → emits \`themeChanged\` → every
widget registered through \`applyStyleSheet\` repaints on the next
event-loop turn. **No restart**.
- "Save As…" prompts for a theme name and writes the current tokens to
\`~/.config/AetherSDR/themes/\<name\>.json\` via
\`saveCurrentThemeAs()\`. The new theme is registered + made active
immediately.

## ThemeManager additions

| Method | Purpose |
|---|---|
| \`allTokenKeys()\` | Sorted enumeration of every loaded token — used
by the editor to populate its list. |
| \`setColor(token, color)\` | In-memory mutation + themeChanged. Hex
round-trip so \`cssFragment()\` / \`resolve()\` pick up the new value
the same way they pick up loaded tokens. No-op on a same-value write. |
| \`setSizing(token, int)\` | Integer-token equivalent for panel padding
/ border widths. Not yet exposed in the editor UI; will land in PR 2
alongside font/sizing surface. |
| \`saveCurrentThemeAs(name)\` | Rebuilds nested JSON from the flat
dotted-key map (so on-disk shape matches bundled themes), writes to user
themes dir, registers + activates. Handles QString/int/double/bool
scalars + full \`ThemeGradient\` round-trip so the waterfall colormap
and slice.dim tokens persist correctly. |

## Explicitly NOT in this PR (deferred to Phase 5 PR 2-4)

1. **Inspector mode** (click-on-widget to find tokens that paint it).
\`ThemeManager::tokensForWidget()\` already exposes the reverse-map
populated by \`applyStyleSheet\`; wiring is a few hundred lines once we
settle on the latch/unlatch UX. Probably matches the AetherControl
double-click convention (aethersdr#3103).
2. **Gradient editing** for
\`waterfall.colormap.{default,grayscale,fire,…}\` and
\`slice.dim.{a..h}\`. The list filters them out via the
\`brush().gradient()\` probe so they don't render as
misleading-first-stop swatches.
3. **Font / sizing editing** — same Phase 5 PR 2 surface as the
inspector mode.
4. **Import** (file picker for arbitrary JSON), drag-and-drop, theme
deletion, theme renaming.

## Build verified clean

- [x] AetherSDR builds clean
- [x] All 320 targets including every test target

## Phase status

| Phase | Item | Status |
|---|---|---|
| 1 | ThemeManager scaffolding + JSON loader | ✅ |
| 2 | Gradient tokens + applyStyleSheet reverse-map + mass migration | ✅
|
| 3 | Paint-code migration + canonical-table closeout | ✅ |
| 4 | Default Light theme | ⏳ (aethersdr#3129, in review) |
| **5** | **Editor UI (PR 1: live colour editing + Save As)** | **this
PR** |

## Test plan

- [ ] CI: build / check-paths / check-windows / CodeQL
- [ ] Visual smoke:
  - [ ] View → Theme Editor… opens the modeless dialog
  - [ ] Title shows "Editing: Default Dark" (or whatever's active)
  - [ ] Filter bar — type \`accent\` → only accent.* rows visible
- [ ] Click an accent row → QColorDialog opens, pick a wild hue, accept
→ that colour appears immediately wherever \`color.accent\` paints (most
buttons, slider handles, badges)
  - [ ] Save As… → name it "Test", confirm:
    - File written to \`~/.config/AetherSDR/themes/Test.json\`
    - Title bar updates to "Editing: Test"
    - View → Theme submenu (from aethersdr#3129) now lists "Test"
- [ ] Switch back to Default Dark via the View menu → original colours
restored, custom edits gone (file on disk preserved)
- [ ] Reopen Test from the menu → custom edits restored from the saved
file

73, Jeremy KK7GWY & Claude (AI dev partner)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

---------

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>