feat: add FAB26 Boston event firmware edition

Adds FAB26 Boston (22nd International Fab Lab Conference & Symposium,
July 27-31 2026, MIT / Cambridge MA) to the event firmware manifest,
inserted chronologically between Open Sauce and DEF CON.

- data/eventFirmware.json: new FAB edition with the official brand theme
  (navy/red/gold palette sampled from fab26.fabevent.org, Montserrat
  fonts). firmware block left null until a build ships. Bumped generatedAt.
- static/eventFirmware/fab26.png: bundled official 200x200 logo (RGBA).
- src/lib/eventFirmware.ts: refresh the theme doc comment.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: thebentern

data/eventFirmware.json

@@ -1,6 +1,6 @@
 {
   "version": 2,
-  "generatedAt": "2026-06-30T00:00:00Z",
+  "generatedAt": "2026-07-18T00:00:00Z",
   "source": "bundled",
   "editions": [
     {
@@ -65,6 +65,38 @@
         "releaseNotes": "## Welcome to Open Sauce 2026! 🔧\n\nThis firmware has been customized for Open Sauce with factory default configurations.\n\n### ⚠️ Important: Backup Before Flashing\n\nIf your device has existing settings or encryption keys, **backup your keys / configurations** before proceeding. Flashing will reset your device to factory settings for the event.\n\n### Quick Start\n\n1. Ensure a **data-capable USB cable** is connected\n2. Select your device type\n3. Choose \"Full Erase and Install\"\n4. After flashing, download the Meshtastic app and pair via Bluetooth\n5. If you updated from a previous version or installed a UF2 on an NRF52 device, you will need to perform a factory reset on the device to activate the Open Sauce mode.\n\n**Happy meshing from San Mateo!**"
       }
     },
+    {
+      "edition": "FAB",
+      "displayName": "FAB26 Boston",
+      "welcomeMessage": "Welcome to FAB26 Boston! 🛠️",
+      "tag": "FAB26",
+      "eventStart": "2026-07-27",
+      "eventEnd": "2026-07-31",
+      "timeZone": "America/New_York",
+      "location": "MIT, Cambridge, Massachusetts, USA",
+      "iconUrl": "https://api.meshtastic.org/resource/eventFirmware/fab26.png",
+      "accentColor": "#13293D",
+      "domain": "fab26.meshtastic.org",
+      "links": [
+        { "label": "Event Website", "url": "https://fab26.fabevent.org" },
+        { "label": "Fab Foundation", "url": "https://fabfoundation.org" }
+      ],
+      "theme": {
+        "name": "Reimagine the Future",
+        "tagline": "Celebrating 25 years of the Fab Lab Network and reimagining the next 25.",
+        "colors": { "primary": "#13293D", "secondary": "#BF2620", "accent": "#EAB14B" },
+        "palette": ["#13293D", "#BF2620", "#F6F2E8", "#EAB14B", "#D3CABA"],
+        "fonts": { "heading": "Montserrat", "body": "Montserrat" }
+      },
+      "firmware": {
+        "slug": "fab2026",
+        "version": null,
+        "id": null,
+        "title": null,
+        "zipUrl": null,
+        "releaseNotes": null
+      }
+    },
     {
       "edition": "DEFCON",
       "displayName": "DEF CON 34",

src/lib/eventFirmware.ts

@@ -17,7 +17,8 @@ export interface EventFirmwareLink {
 // Brand/theme metadata for ambient event styling (web-flasher tints its whole
 // UI from this; Android may adopt it later). accentColor stays the single
 // primary swatch for clients that only want one color; theme.colors.primary
-// mirrors it. All optional — only DEFCON ships a full published style guide.
+// mirrors it. All optional — DEFCON and FAB26 carry the fullest themes
+// (multi-color palette + fonts); others may ship only a single accent.
 export interface EventFirmwareTheme {
   name?: string | null; // theme title, e.g. "Agency"
   tagline?: string | null; // one-line theme statement