@@ -55,6 +55,23 @@ renderer/
     60-modals.css       — Rack-edit / friend / account / login / alert modals
     70-detail-misc.css  — icons, stats, table/grid, detail panel, debug, twin-link, toolbox, TD edit, TD1S, display-name
   locales/         — en.json fr.json de.json es.json it.json zh.json pt.json pt-pt.json pl.json
+  printers/        — one sub-folder per brand; each has PROTOCOL.md + index.js
+    bambulab/
+      PROTOCOL.md  — agent skill: MQTTS port 8883, AMS, SSDP+TLS discovery, camera JPEG/RTSP
+      index.js     — live integration (stub — not yet implemented)
+    creality/
+      PROTOCOL.md  — agent skill: WS port 9999, heartbeat, CFS boxsInfo, WebRTC camera
+      RETRO.md     — live SSH observations on real Ender-3 V4 hardware (reference)
+      index.js     — live integration (implemented)
+    elegoo/
+      PROTOCOL.md  — agent skill: MQTT port 1883, UDP discovery port 52700
+      index.js     — live integration (stub — not yet implemented)
+    flashforge/
+      PROTOCOL.md  — agent skill: HTTP port 8898, TCP 8899, UDP multicast discovery, MJPEG camera
+      index.js     — live integration (implemented)
+    snapmaker/
+      PROTOCOL.md  — agent skill: WS port 7125 (Moonraker), JSON-RPC, HTTP discovery
+      index.js     — live integration (implemented)
 data/
   id_brand.json id_material.json id_aspect.json id_type.json
   id_diameter.json id_measure_unit.json id_version.json
@@ -63,6 +80,20 @@ assets/svg/
   tigertag_logo.svg  tigertag_logo_contouring.svg
 ```
 
+## Printer agent skills
+
+Each brand under `renderer/printers/<brand>/PROTOCOL.md` is a **self-contained agent skill** — a complete reference that lets an AI implement the integration without reading Flutter source. Read the relevant `PROTOCOL.md` **before** touching any `index.js` in that folder.
+
+| Brand | PROTOCOL.md highlights | index.js status |
+|-------|------------------------|-----------------|
+| **Bambu Lab** | MQTTS 8883 TLS, AMS 16-slot, SSDP+TLS scan, JPEG TCP 6000 / RTSP 322 | stub |
+| **Creality** | WS 9999, heartbeat `"ok"`, CFS boxsInfo type 0/1, WebRTC port 8000 | ✅ implemented |
+| **Elegoo** | MQTT 1883, UDP spray port 52700, filament 4 slots canvas/tray | stub |
+| **FlashForge** | HTTP poll 8898, TCP M-codes 8899, UDP multicast 225.0.0.9:19000 | ✅ implemented |
+| **Snapmaker** | WS 7125 Moonraker + proprietary, RRGGBBAA color, HTTP scan | ✅ implemented |
+
+> **RETRO.md** (Creality only) — raw live-hardware SSH observations; PROTOCOL.md is the authoritative merge.
+
 ## LocalStorage keys
 | Key | Content |
 |-----|---------|
 
@@ -5,6 +5,39 @@ Mis à jour en fin de chaque session Claude.
 
 ---
 
+## 2026-05-11 — v1.5.0
+
+### Demandes
+- **Elegoo** : fix corrélation thumbnail historique (firmware renvoie le numéro de méthode 1045 en tant qu'`id`, pas notre request ID incrémental)
+- **TigerScale** : bouton connexion/déconnexion WS unique par card
+- **TigerScale** : log WS collapsible dans chaque card (80 lignes, direction ← → ·, timestamp)
+- **TigerScale** : fix CORS — `fetch()` ping bloqué par Chromium dans Electron renderer → supprimé, WS se connecte directement
+- **TigerScale** : fix noms de champs WS (`netWeight`, `scaleStatus` camelCase, pas snake_case)
+- **TigerScale** : refonte complète du panneau live — gradient violet, badge statut, mini-panel filament, affichage poids 56 px, split CONTAINER/FILAMENT, grille UID 2 colonnes avec logique `resolve()` twin, bouton TARE hold-to-confirm
+- **TigerScale** : card et bouton TARE masqués automatiquement à la déconnexion
+- **TigerScale** : 0 → `—` pour container et filament (pas pour le poids principal)
+
+### Fichiers modifiés
+| Fichier | Nature de la modification |
+|---------|--------------------------|
+| `renderer/printers/elegoo/index.js` | Corrélation thumbnail : remplace ID-based par `_historyThumbPendingFn !== null`; live-print thumbnail supprimé pendant queue active |
+| `renderer/IoT/tigerscale/index.js` | `connectScaleWs` sync (no ping); `_scaleLocalState` étendu (`brand`, `material`, `color`, `uidTwin`); `onmessage` parse `brand`/`material`/`color` + clear sur `"ready"`; `_buildScaleLocalBlockHtml` entièrement réécrit (gradient card, badge, filament panel WS-driven, weight, split row, UID grid avec `resolve()`); `_buildScaleCardHtml` : tare-btn sibling hors `.scale-card-local`; `_wireScaleCardEvents` hold-to-confirm 1 s; `.tare-success` → `.success` |
+| `renderer/IoT/tigerscale/tigerscale.css` | Refonte CSS : `.sc2-live-card` gradient spec, `.send-status`, `.filament-panel`/`-dot`/`-row`/`-label`/`-value`, `.sc2-inner`, `.user-name`, `.weight-display`, `.sc2-weight-num`, `.weight-unit`, `.weight-meta-*`, `.uid-rows` grid 2 col, `.uid-row`/`-chip-label`/`-value`, `.uid-value--twin` (vert), `.tare-hold-btn` + `.tare-progress` + `@keyframes fillProgress` + `.success`; suppression classes obsolètes sc2-badge/split/readers |
+| `package.json` | version `1.4.15` → `1.5.0` |
+| `README.md` | Sections changelog v1.4.15 et v1.5.0 |
+| `ROADMAP.md` | ✅ TigerScale live WS panel + backlog mis à jour |
+| `DEVLOG.md` | Ce fichier |
+
+### Notes techniques
+- **Elegoo thumbnail** : `_historyThumbPendingFn !== null` comme discriminateur — pas besoin de comparer des IDs que le firmware ne respecte pas
+- **CORS Electron** : `fetch()` vers IP locale bloqué par Chromium renderer (pas d'en-tête `Access-Control-Allow-Origin`); WebSocket contourne CORS nativement
+- **Filament panel** : données 100 % WS (`brand`, `material`, `color`). Format couleur firmware : `"Red #FF0000"` → regex `/#([0-9A-Fa-f]{6})\b/` pour extraire le hex; fallback `rgba(255,255,255,0.25)`
+- **UID resolve()** : si slot physique vide + autre slot occupé + `uidTwin` connu → afficher twin en vert dans le slot vide. Si `uidTwin` absent → `🔗 Twin` (placeholder vert). Grille toujours à 2 colonnes.
+- **TARE** : bouton sibling hors `.scale-card-local` → jamais re-rendu au 10 Hz. CSS sibling selector `.scale-card-local:empty ~ .tare-hold-btn { display:none }` pour masquer sans JS supplémentaire
+- **10 Hz rebuild** : `_buildScaleLocalBlockHtml` retourne `""` si `!st.connected` → `.scale-card-local:empty { display:none }` cache la card automatiquement
+
+---
+
 ## 2026-05-09 — v1.4.15
 
 ### Demandes
 
@@ -35,6 +35,7 @@
 - **Friends system** — Share a 6-character public code (`XXX-XXX`) with friends, send/accept/refuse/block friend requests, view a friend's inventory in the main interface in read-only mode, optional public inventory toggle for frictionless sharing
 - **Friend inventory view** — A friend appears as a switchable pseudo-account in the avatar dropdown and profiles modal; clicking opens their inventory in the same table/grid UI with a "Read-only" banner and a quick "← My inventory" button
 - **3D printer management** — Dedicated "Printers" tab with a drag-and-drop grid of all your printers across the 5 supported brands (Bambu Lab / Creality / Elegoo / FlashForge / Snapmaker); per-brand "Add" flow with model picker, side card with editable connection details, and online / offline indicator driven by an HTTP ping
+- **TigerScale live integration** — Real-time WebSocket connection to the open-source TigerScale ESP32 filament scale. Each scale card shows live weight (56 px display), CONTAINER / FILAMENT split, send-status badge (`idle` → `scanning` → `stable` → `send` → `success`), filament mini-panel (brand + material + colour dot, driven by the WS frame), and a 2-column UID reader grid where the empty slot auto-fills with the Firestore-resolved twin tag in green. TARE is a hold-to-confirm button (1 s) that POSTs `/api/tare`. The card and TARE button hide automatically when the WebSocket is disconnected; a connect/disconnect toggle in the card header gives manual control with auto-reconnect suppression on explicit disconnect.
 - **Snapmaker live integration** — Real-time WebRTC camera, live extruder + bed temperatures, filament data per slot (color, brand, material) with click-to-edit, and active-print job card (preview thumbnail + progress + state + layer counter) over the Moonraker WebSocket
 - **FlashForge live integration** — HTTP polling on port 8898 (`/detail` every 2 s), real-time MJPEG camera with auto-recovery on connection failure (mjpg-streamer's 1-client limit handled gracefully), 5-slot matlStation grid (`Ext.` + `1A` `1B` `1C` `1D`) showing each bay's assigned colour + material — even when empty — so the user knows what to refill where, click-to-edit per slot via FlashForge's `/control` HTTP API (`msConfig_cmd` / `ipdMsConfig_cmd`), and a debug-mode Request log surfacing every outgoing POST + response in real time
 - **Snapmaker LAN discovery** — Side-panel scanner that finds Snapmaker printers on the local network: instant mDNS browse on `_snapmaker._tcp.local.` (TXT record carries IP / model / device name / serial), parallel Moonraker port-scan as fallback (port 7125 with `/printer/info` + `/server/info` + `/machine/system_info`), per-source batch sizing (24 on local LAN, 4 on user-declared extras to survive anti-scan firewalls), brand-confirmed candidates only (`machine_type` containing "Snapmaker"), one-click add that writes the printer doc directly to Firestore and opens its detail panel, plus inline "Add by IP" with live IPv4 validation
@@ -52,6 +53,34 @@
 
 ## Changelog
 
+### v1.5.0 — 2026-05-11
+
+#### TigerScale — live WebSocket panel
+- **Connect / disconnect toggle button** on each scale card. A single button in the card header opens or closes the WebSocket connection manually; manual disconnect suppresses the 5-second auto-reconnect so the card stays quiet until the user reconnects explicitly.
+- **WS event log** — collapsible `<details>` strip below each scale card showing the last 80 events (connect, raw frames, errors, retries) with direction arrows (← / → / ·) and per-line timestamps. Useful for diagnosing firmware issues without opening DevTools.
+- **CORS fix** — removed the pre-connect `fetch()` ping (blocked by Chromium CORS in Electron renderer when the firmware returns no `Access-Control-Allow-Origin` header). `connectScaleWs` is now synchronous and opens the WebSocket directly; `onclose` handles retries.
+- **Field-name fix** — WS parser corrected from snake_case (`net_weight`, `status`) to the actual camelCase fields the firmware sends (`netWeight`, `scaleStatus`).
+- **Gradient live card** — a second card below the dark info card (head + chips + last spool) shows live data with a purple gradient matching the TigerScale mobile app. Hidden automatically when the WS is disconnected; reappears on reconnect.
+- **Send-status badge** — top-left absolute pill inside the gradient card maps `scaleStatus` firmware values (`idle`, `scanning:N`, `stable:N`, `send`, `success`, `error`, `done`, `ready`) to emoji + text with per-state background colours.
+- **Filament mini-panel** — top-right overlay (dark blur) shows the colour dot (extracted from the firmware `color` field `"Red #FF0000"` format), brand, and material. Appears only when the firmware sends non-empty brand or material; clears automatically when `scaleStatus` becomes `"ready"` (spool removed). Data comes from the WebSocket — no Firestore lookup.
+- **Weight display** — 56 px bold weight number with unit. Container and filament show `—` when zero; main weight shows `0` normally.
+- **UID reader grid** — 2-column grid (Left reader ◀ / Right reader ▶) always visible. A `resolve()` function fills the empty slot with the twin UID (green `#4ade80`) when Firestore resolves it, or `🔗 Twin` as placeholder while waiting. The twin row is never a third row — it appears in the vacant slot.
+- **TARE hold-to-confirm** — 1-second press on the TARE button (`#667eea`) fills a white progress bar then POSTs `/api/tare` to the scale. Button is hidden when disconnected (CSS sibling selector on empty `.scale-card-local`). Success flashes green (`#48bb78`).
+
+#### Elegoo — thumbnail correlation fix
+- History thumbnail responses are now correlated by `_historyThumbPendingFn !== null` rather than by request ID. The Elegoo firmware echoes the method number (1045) as the response `id` — not our incremental request ID — so ID-based matching never worked and history thumbnails were silently dropped.
+
+### v1.4.15 — 2026-05-09
+
+#### Creality live integration
+- Real-time WebSocket connection to Creality printers on port 9999 with automatic heartbeat (request/response polling every 2 s).
+- Live nozzle, bed, and enclosure temperatures with colour-coded indicators; print state (`idle` / `printing` / `finished`), job progress bar, layer counter, and estimated duration.
+- **CFS colour grid** — activated when `cfsConnect=1` and `materialBoxs[]` is non-empty; shows each slot's assigned colour pill and material label.
+- **WebRTC camera** — inline `<iframe>` at `http://$ip/webcam/webrtc` (same pattern as Snapmaker / Crowsnest) when `webrtcSupport=1`.
+- **Print thumbnail** — fetched from `http://$ip/downloads/original/current_print_image.png` while a job is active.
+- WS event log with Pause / Clear / row-expand, same UI as Snapmaker and FlashForge.
+- Online / Offline badge in the printer grid and side panel driven by a lightweight WS probe (open → mark online → close immediately, 30 s TTL).
+
 ### v1.4.14 — 2026-05-08
 
 #### Add Product — multi-colour picker (Mono / Dual / Tri / Rainbow)
@@ -816,4 +845,10 @@ Please use [GitHub Issues](https://github.com/TigerTag-Project/TigerTag_Studio_M
 
 [MIT](LICENSE) — © TigerTag Project
 
-You are free to use, modify, and distribute this software. See the [LICENSE](LICENSE) file for details.
+You are free to use, modify, and distribute Tiger Studio — including commercially.
+
+The **"TigerTag"** name (RFID protocol + cloud service) is a trademark of the TigerTag Project.
+See [TRADEMARK.md](TRADEMARK.md) for usage conditions (short version: reference freely, don't rebrand a competing service).
+
+All 303 npm dependencies are permissive (MIT / ISC / BSD / Apache — zero copyleft).
+See [THIRD_PARTY_LICENSES.md](THIRD_PARTY_LICENSES.md) for the full breakdown.
@@ -78,6 +78,7 @@ Grouped by domain. Versions in parentheses are the release that landed the featu
 - ✅ **ACR122U NFC reader** (USB) via `nfc-pcsc` — `main.js` ↔ renderer IPC bridge
 - ✅ **TD1S sensor** integration — TD + color reading, auto-detect on USB plug, log panel
 - ✅ **TigerScale heartbeat** — `users/{uid}/scales/{mac}` with 90s online threshold, scale panel render
+- ✅ **TigerScale live WebSocket panel** — connect/disconnect toggle, WS event log, gradient live card matching mobile app, send-status badge, filament mini-panel (WS-driven: brand/material/color from firmware), 56 px weight display, UID reader 2-col grid with `resolve()` twin logic (vert = cloud, blanc = physique), TARE hold-to-confirm 1 s → POST `/api/tare`, card + button hidden on disconnect. (v1.5.0)
 - ✅ **TD1S button in Add Product panel** — icon in the ADP header: disconnected → opens connect modal; connected → glows green and auto-fills colour HEX + TD value fields on scan. State syncs on every `onStatus` event and `openAddProductPanel()` call. (v1.4.13)
 
 ### Distribution & i18n
@@ -691,7 +692,7 @@ No commitment, no ETA. Listed roughly by likely impact.
 - **Print history per spool** — track which printer used which spool over time. Needs: schema decision (top-level `printJobs/` collection? embedded in spool doc?), capture hook in Snapmaker WS layer (the print job card already has the data we'd need), history UI in spool detail panel.
 - **Spool predictions** — *"this spool will run out around X day"* based on historical usage. Depends on print history existing first.
 - **Filament cost tracking** — per-spool cost field, aggregate by month / by printer / by material in stats. Pure UI + schema addition.
-- **TigerScale enhancements** — current scale panel shows heartbeat + battery; could add: tare action, multi-spool weighing, automatic transfer of weight to the active spool.
+- **TigerScale — auto weight transfer** — after a successful TARE + send cycle, auto-update the matched spool's `weight_available` in Firestore from `netWeight`.
 - **Marketplace / shared filament profiles** — share a `(material, brand, optimal_settings)` triple to a public registry; users could pull recommended print profiles for a given spool.
 - **Web build** — multiple comments in `inventory.js` mention *"future web build hosted on tigertag-cdn"*. Sidesteps Electron's NFC requirement (no NFC = no scan, but read-only inventory works fine in browser). Needs: Electron-API polyfills/stubs, build target split.
 - **Mobile companion app deep-linking** — the desktop app shows a QR for the mobile app; mobile could deep-link back into a specific spool / printer / friend on desktop.
 
@@ -0,0 +1,85 @@
+# Third-Party Licenses
+
+Tiger Studio Manager is released under the **MIT License**.
+It depends on the following third-party components, each retaining its own license.
+
+---
+
+## Runtime — Electron framework
+
+### Electron
+- **License**: MIT
+- **Source**: https://github.com/electron/electron
+
+Electron bundles **Chromium** (BSD / various) and **Node.js** (MIT).
+Their respective license notices are included in the distributed app binary
+under `LICENSE.electron.txt` (generated by electron-builder at build time).
+
+---
+
+## npm dependencies — license summary
+
+All 303 production and build-time dependencies are permissive.
+No GPL, LGPL, AGPL, MPL, CDDL, or EPL dependencies are present.
+
+| License | Count |
+|---|---|
+| MIT | 238 |
+| ISC | 34 |
+| BlueOak-1.0.0 | 8 |
+| BSD-2-Clause | 7 |
+| Apache-2.0 | 6 |
+| BSD-3-Clause | 5 |
+| WTFPL / other permissive | 5 |
+
+### Notable dependencies
+
+| Package | License | Purpose |
+|---|---|---|
+| electron-builder | MIT | Cross-platform packaging & auto-update |
+| serialport | MIT | USB serial (ACR122U RFID reader, TD1S sensor) |
+| @pokusew/pcsclite | ISC | PC/SC smart card layer |
+| firebase (compat SDK) | Apache-2.0 | Firestore + Auth |
+| got | MIT | HTTP client |
+| @electron/notarize | MIT | macOS notarization |
+| @electron/osx-sign | BSD-2-Clause | macOS code signing |
+| 7zip-bin | MIT | App packaging |
+
+### Full dependency list
+
+To generate the complete license list with URLs:
+
+```bash
+npx license-checker --excludePrivatePackages --csv > licenses.csv
+```
+
+---
+
+## Firebase Web SDK
+
+Tiger Studio uses the **Firebase JavaScript SDK (compat)** loaded from local files:
+
+- `firebase-app-compat.js`
+- `firebase-auth-compat.js`
+- `firebase-firestore-compat.js`
+
+- **License**: Apache License 2.0
+- **Source**: https://github.com/firebase/firebase-js-sdk
+- **Copyright**: Google LLC
+
+---
+
+## Fonts & Icons
+
+The UI uses system fonts only — no bundled font files.
+Icons are rendered via CSS (Unicode / emoji) or inline SVG — no icon library bundled.
+
+---
+
+## No copyleft components
+
+Tiger Studio contains **no GPL, LGPL, AGPL, or other copyleft-licensed code**.
+All dependencies are permissive (MIT, ISC, BSD, Apache, BlueOak).
+This means Tiger Studio can be used commercially and in proprietary derivatives
+without any copyleft obligations, subject only to attribution requirements
+of the individual permissive licenses (MIT copyright notices, etc.).