docs: highlight button remapping (README + CHANGELOG)

README: add a "Button remapping" feature bullet and a "Remap tab" entry
under the Web Config Tool section. CHANGELOG [Unreleased]: add a Companion
web tool note documenting the visual Remap editor + Zacksly CC BY 3.0
asset attribution.

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

CHANGELOG.md

@@ -16,6 +16,10 @@ Format follows [Keep a Changelog](https://keepachangelog.com/en/1.1.0/). Version
 
 - **BT microphone now has packet-loss concealment (PLC).** The mic decode path gained a small decoded-frame jitter buffer (8 frames) drained at a steady 10 ms playout cadence: bursty BT delivery is smoothed, and a dropped mic frame during an active session is concealed with an Opus PLC frame (`opus_decode(decoder, NULL, 0, …)`) instead of leaving a hole the host hears as a click/dropout. Playout pre-buffers 3 frames and stops after 300 ms of no real frames (so it never emits comfort noise when the mic is idle). A new **`Mic PLC:`** counter on the Diagnostics screen climbs only when concealment fires — effectively a live BT link-quality gauge. Verified: forced BT loss kept the captured audio gap-free (longest zero-run ~0 ms) while the counter climbed. Design ported from [SundayMoments/DS5_Bridge](https://github.com/SundayMoments/DS5_Bridge) (credit). Adds ~30 ms mic latency (the pre-buffer).
 
+### Companion web tool
+
+- **Visual button-remapping editor (new Remap tab).** `DS5Dongle-OLED-Config-Web` gains a dedicated **Remap** tab built on the new firmware remap protocol: click a button on a live, theme-aware DualSense diagram to reassign it, with the shoulders/triggers (L1/L2/R1/R2) floated to the corners as labeled glyphs + leader lines (they have no target in a front view). Remapped/selected buttons glow; a collapsible full dropdown list is kept as a fallback. Reads the remap block appended to the `0xF7` config response and writes over `0xF6` (func `0x10`), independent of `Config_body`. Controller outline + button glyphs are [Zacksly's "PS5 Button Icons and Controls"](https://zacksly.itch.io/ps5-button-icons-and-controls) (CC BY 3.0, recolored to `currentColor` and cropped), credited in the footer, each asset file, and a bundled license. Strings translated across all 7 locales.
+
 ---
 
 ## [0.6.8-oled-edition] — 2026-05-24

README.md

@@ -18,6 +18,7 @@ The web tool is a one-stop shop — **no installs, no command line, no `picotool
 
   > **What is BOOTSEL mode?** It's the Pico's built-in flashing mode. To enter it: press and hold the small white button labeled **BOOTSEL** on the Pico, *then* plug the USB cable in (or, if it's already plugged in, briefly disconnect and reconnect while holding BOOTSEL). The Pico will appear to your computer as a removable drive — that's how you know it's in BOOTSEL mode. After the web tool flashes the firmware, the Pico auto-reboots into normal mode and is ready to use.
 - **Config tab** — once the dongle is flashed and reconnected, edit haptics gain, speaker volume, polling rate, audio auto-haptics mode, and the rest of the persistent settings; save to the dongle's flash with one click. Powered by WebHID.
+- **Remap tab** — visual button remapper: click a button on a live DualSense diagram to reassign it to any other (the shoulders/triggers float to the corners as labeled glyphs). The map is stored on the dongle and applied before the host sees the report, so it works in every game and on every OS. Powered by WebHID.
 - **OLED Preview tab** — pixel-perfect emulation of all 11 OLED screens. Use the in-page KEY0/KEY1 buttons (or the controller's △ / R1 / D-pad when a DualSense is paired) to navigate. Adaptive triggers actually fire on the controller when you cycle the Trigger Test preset.
 
 Works in any Chromium-based browser (Chrome, Edge, Brave, Opera). Firefox + Safari don't expose WebHID or WebUSB, so flashing and live config aren't available there — the OLED Preview still renders with mock data.
@@ -43,6 +44,7 @@ This project enables the Raspberry Pi Pico2W to function as a Bluetooth bridge f
 **OLED Edition additions:**
 
 - Optional Pico-OLED-1.3 status display with **11 screens** (status, slots, lightbar, trigger test, gyro tilt, touchpad, diagnostics, CPU/clock, RSSI, VU meters, settings)
+- **Button remapping** — reassign any of the 16 digital controls (face buttons, D-pad, shoulders/triggers, stick clicks, Create/Options) to any other. Stored on the dongle and applied before the host sees the report, so it works in **every game and OS with no host-side software**; identity (no remap) is the default. Edit it visually in the [web config tool](#️-web-config-tool)'s **Remap tab**, or headlessly via `scripts/remap_test.py`. Persisted in its own flash sector, survives reboot.
 - **4-slot persistent multi-controller pairing** — bond up to four DualSenses, switch between them from the OLED, slot 0 reconnects automatically on boot
 - **Lightbar color picker** with 4 user favorite slots + breathing / rainbow / fade effect presets
 - **Persistent settings menu** for the 8 firmware config fields (haptics gain, speaker volume, polling rate, etc.) with hold-to-confirm Reset and Wipe-all-slots actions