fix: skip browser open on tray restart, add WLED rename TODO

Set WLED_RESTART=1 env var on tray restart so __main__.py skips
opening a new browser tab — the user already has one open.

Add important TODO item to eliminate WLED naming throughout the app
(package rename, i18n, build scripts, etc.).

TODO-css-improvements.md

@@ -0,0 +1,106 @@
+# TODO
+
+## IMPORTANT: Remove WLED naming throughout the app
+
+- [ ] Rename all references to "WLED" in user-facing strings, class names, module names, config keys, file paths, and documentation
+- [ ] The app is **LedGrab** — not tied to WLED specifically. WLED is just one of many supported output protocols
+- [ ] Audit: i18n keys, page titles, tray labels, installer text, pyproject.toml description, README, CLAUDE.md, context files, API docs
+- [ ] Rename `wled_controller` package → decide on new package name (e.g. `ledgrab`)
+- [ ] Update import paths, entry points, config references, build scripts, Docker, CI/CD
+- [ ] **Migration required** if renaming storage paths or config keys (see data migration policy in CLAUDE.md)
+
+---
+
+# Color Strip Source Improvements
+
+## New Source Types
+
+- [ ] **`weather`** — Weather-reactive ambient: maps weather conditions (rain, snow, clear, storm) to colors/animations via API
+- [ ] **`music_sync`** — Beat-synced patterns: BPM detection, energy envelope, drop detection (higher-level than raw `audio`)
+- [ ] **`math_wave`** — Mathematical wave generator: user-defined sine/triangle/sawtooth expressions, superposition
+- [ ] **`text_scroll`** — Scrolling text marquee: bitmap font rendering, static text or RSS/API data source *(delayed)*
+
+### Discuss: `home_assistant`
+
+Need to research HAOS communication options first (WebSocket API, REST API, MQTT, etc.) before deciding scope.
+
+### Deferred
+
+- `image` — Static image sampler *(not now)*
+- `clock` — Time display *(not now)*
+
+## Improvements to Existing Sources
+
+### `effect` (now 12 types)
+
+- [x] Add effects: rain, comet, bouncing ball, fireworks, sparkle rain, lava lamp, wave interference
+- [x] Custom palette support: user-defined [[pos,R,G,B],...] stops via JSON textarea
+- [ ] Custom palette editor: replace raw JSON textarea with a proper visual editor (reuse gradient editor pattern with color pickers + position sliders)
+
+### `gradient`
+
+- [x] Noise-perturbed gradient: value noise displacement on stop positions (`noise_perturb` animation type)
+- [x] Gradient hue rotation: `hue_rotate` animation type — preserves S/V, rotates H
+- [x] Easing functions between stops: linear, ease_in_out (smoothstep), step, cubic
+
+### `audio`
+
+- [ ] New audio source type: band extractor (bass/mid/treble split) — responsibility of audio source layer, not CSS
+- [ ] Peak hold indicator: global option on audio source (not per-mode), configurable decay time
+
+### `daylight`
+
+- [x] Longitude support for accurate solar position (NOAA solar equations)
+- [x] Season awareness (day-of-year drives sunrise/sunset via solar declination)
+
+### `candlelight`
+
+- [x] Wind simulation: correlated flicker bursts across all candles (wind_strength 0.0-2.0)
+- [x] Candle type presets: taper (steady), votive (flickery), bonfire (chaotic) — applied at render time
+- [x] Wax drip effect: localized brightness dips with fade-in/fade-out recovery
+
+### `composite`
+
+- [ ] Allow nested composites (with cycle detection)
+- [ ] More blend modes: overlay, soft light, hard light, difference, exclusion
+- [ ] Per-layer LED range masks
+
+### `notification`
+
+- [x] Chase effect (light bounces across strip with glowing tail)
+- [x] Gradient flash (bright center fades to edges, exponential decay)
+- [x] Queue priority levels (color_override = high priority, interrupts current)
+
+### `api_input`
+
+- [ ] Crossfade transition when new data arrives
+- [ ] Interpolation when incoming LED count differs from strip count
+- [ ] Last-write-wins from any client (no multi-source blending)
+
+## Architectural / Pipeline
+
+### Processing Templates (CSPT)
+
+- [x] HSL shift filter (hue rotation + lightness adjustment)
+- [x] ~~Color temperature filter~~ — already exists as `color_correction`
+- [x] Contrast filter
+- [x] ~~Saturation filter~~ — already exists
+- [x] ~~Pixelation filter~~ — already exists as `pixelate`
+- [x] Temporal blur filter (blend frames over time)
+
+### Transition Engine
+
+Needs deeper design discussion. Likely a new entity type `ColorStripSourceTransition` that defines how source switches happen (crossfade, wipe, etc.). Interacts with automations when they switch a target's active source.
+
+### Deferred
+
+- Global BPM sync *(not sure)*
+- Recording/playback *(not now)*
+- Source preview in editor modal *(not needed — overlay preview on devices is sufficient)*
+
+---
+
+## Remaining Open Discussion
+
+1. **`home_assistant` source** — Need to research HAOS communication protocols first
+2. **Transition engine** — Design as `ColorStripSourceTransition` entity: what transition types? (crossfade, wipe, dissolve?) How does a target reference its transition config? How do automations trigger it?