Add Hardware tab with sensor stills next to UI previews.

Map each firmware project to a Commons or original module photo for local catalog browsing.

Co-authored-by: Cursor <cursoragent@cursor.com>

public/sensors/ATTRIBUTION.md

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+# Sensor / hardware stills — attribution
+
+Images under `public/sensors/` are used only for the flasher catalog “Hardware” tab.
+
+## Wikimedia Commons (Creative Commons)
+
+| File | Source file on Commons | License (typical) |
+|------|------------------------|-------------------|
+| `dht.jpg` | AM2302 (DHT22) digital temperature and humidity sensor module | CC BY-SA (see Commons page) |
+| `pir.jpg` | PIR motion sensor for Arduino oblique view | CC (see Commons page) |
+| `lcd1602.jpg` | 16x2 Character LCD Display | CC (see Commons page) |
+| `button.jpg` | Tactile switches / related Commons photo | CC (see Commons page) |
+| `microsd.jpg` / `sd.jpg` | MicroSD / SD card Commons photos | CC (see Commons page) |
+| `speaker.jpg` | Loudspeaker / speaker Commons photo | CC (see Commons page) |
+| `rgb.jpg` | RGB LED Commons photo | CC (see Commons page) |
+| `led.jpg` | Red LED Commons photo | CC (see Commons page) |
+| `mic.jpg` | Microphone Commons photo | CC (see Commons page) |
+| `wifi_icon.svg` | Wi-Fi Logo.svg | Trademarked logo; used for identification of onboard Wi‑Fi only |
+| `bluetooth_icon.svg` | Bluetooth.svg | Trademarked logo; used for identification of onboard BLE only |
+
+Full license text and author credit: open the matching file page on https://commons.wikimedia.org/
+
+## Original studio stubs (no third-party copyright)
+
+Generated for this project (no brand marks):
+
+- `bh1750.jpg` — GY-30 / BH1750 style breakout
+- `sgp30.jpg` — SGP30 style breakout
+- `ld2420.jpg` — LD2420 style mmWave module
+- `tm1637.jpg` — TM1637 / HW-069 style 4-digit display
+- `buzzer.jpg` / `active_buzzer` source — active buzzer module
+- `white_led.jpg` — HW-269 style white LED module
+- `ttp223.jpg` — TTP223 style capacitive touch module
+- `sound_sensor.jpg` — digital whistle / sound module
+
+These are illustrative look-alikes, not manufacturer product photos.