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feat: implement MCP drawing as screensaver instead of standalone app

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- Add ScreensaverType::McpScreen to DisplaySettings enum, toString/fromString
- Add 'MCP Screen' option to the Display settings screensaver dropdown
- New McpScreensaver (Screensaver subclass): creates full-screen lv_canvas on
  the overlay, allocates framebuffer in SPIRAM, registers canvas pointer in
  McpSystemState, shows 'Waiting for LLM...' until first draw command arrives
- Wire McpScreensaver into DisplayIdle::activateScreensaver() switch
- McpSystem::ensureOverrideScreen() now calls displayidle::findService()->
  startScreensaver() instead of launching McpOverrideApp — canvas appears
  automatically on any LLM draw command
- Remove McpOverrideApp (replaced by screensaver), deregister from Tactility.cpp
- Remove mcpOverrideEnabled from McpSettings — no longer needed
- Simplify McpSettingsApp: remove Screen Override toggle, update info text to
  direct users to Settings -> Display -> Screensaver -> MCP Screen
This commit is contained in:
Adolfo Reyna
2026-06-27 09:17:50 -04:00
parent 41004a3c6f
commit cd921e1aa9
11 changed files with 160 additions and 59 deletions
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Tactility/Source/app/display/Display.cpp
+2 -1
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@@ -286,7 +286,8 @@ public:
screensaverDropdown = lv_dropdown_create(screensaver_wrapper);
// Note: order correlates with settings::display::ScreensaverType enum order
lv_dropdown_set_options(screensaverDropdown, "None\nBouncing Balls\nMystify\nMatrix Rain\nStackChan");
lv_dropdown_set_options(screensaverDropdown, "None\nBouncing Balls\nMystify\nMatrix Rain\nStackChan\nMCP Screen");
lv_obj_align(screensaverDropdown, LV_ALIGN_RIGHT_MID, 0, 0);
lv_obj_add_event_cb(screensaverDropdown, onScreensaverChanged, LV_EVENT_VALUE_CHANGED, this);
lv_dropdown_set_selected(screensaverDropdown, static_cast<uint16_t>(displaySettings.screensaverType));