- Added keyboard mapping for pushbuttons – assign a key from the component property dialog; keycap badge shows the mapping on the canvas.
- Introduced global message dialog and confirm modal replacing native `confirm()` and `alert()` calls across the editor, file explorer, and other modals.
- Preserved in-progress workspace across login redirect using sessionStorage (stashed as `.vlx` and restored after authentication).
- Added full 830-point and mini 170-point breadboard parts with Fritzing artwork (CC-BY-SA 3.0) and computed pin geometry.
- Added built-in internal connectivity for breadboard strips and power rails (netlist merging).
- Added new 4-pin I2C SSD1306 OLED module and gallery examples for Uno, ESP32, Pico, and STM32.
- Added auto-detecting SSD1306 part that automatically selects I2C or SPI protocol based on wiring.
- Added ESP32 WiFi + MQTT (PubSubClient) gallery example that round-trips through a public broker.
- Added ESP32-S3 ILI9341 TFT display example.
- Added multi-board “Run All” button with split-menu to run only the active board.
- Added wire color discoverable UI on desktop: context menu with color swatches and floating palette when a wire is selected.
- Added featured component sorting – breadboards now lead the component picker.
- Added per-component pin hover highlighting (only the pin under the cursor lights up, matching the breadboard behaviour).
- Added runtime burnout for resistors, electrolytic capacitors, and LEDs (sustained overload destroys the part; charred visual and open circuit).
- Added pre-flight circuit verifier rules: missing power, dangling two‑terminal parts, power shorts, over‑voltage warnings for boards and electrolytic capacitors.
- Added Pico W WiFi emulation (paid feature): virtual DHCP/ARP net, IoT gateway, internet bridge, and full associaton.
- Added AVR EEPROM emulation (fixes hangs on `EEPROM.read/write/update`).
- Added ATtiny85 USI I2C bridge enabling SSD1306 OLED support via TinyWireM.
- Added feedback mechanisms: star banner follow-up for users who dismissed the first prompt, and circuit verification results now appear in the output console.
### Changed
- Redesigned the examples page: compact toolbar, denser grid with 5:3 thumbnails (no black bars), and filter chips with dropdown selects.
- Unified editor toolbar controls now collapse by container width instead of viewport, preventing overlap when the AI chat panel is open.
- Removed redundant file-tabs bar from the toolbar; file switching is now done exclusively from the left explorer.
- Breadboards now always sit behind all other components (z‑index -1) to reflect their physical role.
- Pin overlays stack within their component group and no longer leak through covering components.
- Board pins stay clickable – hover handlers moved to the component wrapper, not the drag overlay.
- Slide-switch model corrected from SPST to genuine SPDT with pin‑1/pin‑3 throws and a common wiper.
- NTC temperature sensor SPICE model fixed (pull‑up on top, NTC to GND) so the decode matches the example sketch.
- SPICE pre-flight and runtime electrical re-solve now triggered on all output pin edges (ESP32, STM32, Raspberry Pi) and on component burnout.
- Circuit verifier findings are now logged to the output console instead of a toolbar toast.
- Virtual file system upload now auto‑starts the Pi and waits for the shell before sending files.
- The Run button shows a spinner and stays disabled while circuit verification is in progress.
- Non‑English locales (zh‑cn, pt‑br) now load correctly on direct navigation.
-`/en/*` routes are redirected to the prefix‑free path instead of rendering a blank page.
- Star banner flags are now separate for dismissal and click‑through, allowing one follow‑up prompt.
- Built‑In breadboard and minimap artwork switched to the Fritzing parts‑library (CC‑BY‑SA 3.0).
- ESP32 digital inputs are now driven from the real SPICE solve for accurate `digitalRead()`; AVR inputs include modeled internal pull‑up resistors; RP2040 and STM32 also benefit from SPICE‑driven inputs.
- Pico W board now loads the `RPI_PICO_W` firmware variant (with `network` module) when a CYW43 peripheral is present.
### Fixed
- Fixed keyboard‑mapped buttons firing while typing in the Monaco code editor (focus sink detection improved).
- Fixed board pins being unclickable when the cursor moved from the drag overlay onto a pin square.
- Fixed wire colour changes from the UI being a no‑op (`applyNow` was `false`).
- Fixed `recordUpdateWire` being undefined in `SimulatorCanvas` causing JavaScript reference errors.
- Fixed rotated component pin positions being wrong for wire starting, undo/redo, and import (three separate bugs).
- Fixed Delete/Backspace key inadvertently triggering board removal instead of only deleting selected components.
- Fixed ESP32 UART pin classification missing for multi‑board Serial interconnect (TX/RX, TX2/RX2 now properly mapped).
- Fixed ESP32‑C3 digital inputs not resolving from SPICE (spiceDrivenInputs enabled).
- Fixed ESP32 dual 3V3/5V pins (e.g., DevKitM‑1) not being tied to the supply rail.
- Fixed ATtiny85 pin name mapping and Timer0 PWM register addresses (blink/PWM works).
- Fixed AVR EEPROM not instantiated –`EEPROM.read/write` no longer hangs.
- Fixed SSD1306 page‑addressing mode (default memory mode set to 2) so Tiny4kOLED and U8g2 render correctly.
- Fixed breadboard holes not connecting during netlist building (5‑hole strips and power rails now merge).
- Fixed breadboard pins invisible for dense components – only the pin under the cursor lights up (consistent with other components).
- Fixed Pico W WiFi emulation: gSPI framing, F2 byte order, host‑wake IRQ, event frames (BDC headers), and virtual DHCP/ARP.
- Fixed Pico W MicroPython file writing (UTF‑8 byte length for LittleFS) – multi‑byte characters no longer truncate files.
- Fixed ESP32‑C3/‑S3 compiling with wrong target (`esp32` instead of `esp32s3`) and missing GPIO pins 40‑48.
- Fixed ESP32 firmware download fast‑path for WiFi emulation (inDiscardableWriteData).
- Fixed SPICE re‑solve not being triggered on ESP32/STM32/Pi output pin edges (LED stayed stuck on).
- Fixed SPICE re‑solve not being triggered when a component burns out (burnt part stayed in the circuit).
- Fixed circuit verifier being blind to current faults in production (branch currents not enumerated via ngspice AllVecs).
- Fixed circuit pre‑flight verification never running on Run button click (click event mistaken for `skipVerify` argument).
- Fixed verification findings being wiped when Run auto‑compiled after verification.
- Fixed tooltip/text fields not being respected when Backspace was used to delete wires (AI chat, etc.).
- Fixed window blur not releasing keyboard‑mapped buttons (no stuck keys after Alt‑Tab).
- Fixed minimap red viewport rectangle not updating during canvas drag (now live‑tracked via `requestAnimationFrame`).
- CHANGELOG.md entries reflect all new features and changes for v3.0.0
### Fixed
- ESP32: WiFi/HTTP client link by enabling mbedTLS PSK; BLE stack switched to Bluedroid; LEDC duty routing for multi‑servo; flash image trimming (10× smaller JSON); sdkconfig defaults for cleaner serial output
- RP2040: delay()‑based sketches now run in real‑time on slow hosts; SPI0 routing fixed for Arduino init; UART TX waveform synthesized
- AVR: serial RX queue so `Serial.readStringUntil` sees full input; UART TX waveform at bit level; INPUT_PULLUP pin state; LED visualization through SPICE
- Multi‑board: initSimulator no longer wipes Interconnect’s UART wrapper; board removal reconciles `running` flag
- Canvas: wires follow component rotation; undo/redo state restored; component deletion cascades to wires; sensor panel opens on desktop click; wire color palette works
- i18n: index.html SEO fallback div removed after mount; missing locale keys for admin/user pages added
- Desktop: openExternal works via cascade of IPC paths; native menu routes navigate in‑window
