feat(theseus/screenshot): 0.2.2 — 3 extra swatches, updateURL points at live theseus.x endpoint

Bundled screenshot addon bump:
- version 0.2.1 → 0.2.2
- palette grows from 5 to 8 colors: adds Orange (#ff9500), Blue
  (#0a84ff), Purple (#bf5af2) alongside acid/red/yellow/white/black —
  common annotation colors that were conspicuously missing
- updateURL swings from the aspirational addons.silentmode.st (which
  never resolved) to the live gateway URL
  https://navigate.st/bns/theseus.x/extensions/screenshot/updates.json,
  where the operator's first signed update entry is now published

The gateway URL is deliberate over the bare `theseus.x/...` form: the
add-on updater runs from Node's main-process https module, which uses
the OS resolver. On installs without Ariadne's Thread the OS can't
resolve theseus.x (BNS-only TLD), so the poll would silently fail;
the navigate.st gateway resolves via standard DNS and forwards to the
same BNS-backed Sia content, so every install reaches the endpoint.

First signed update is live at:
  https://navigate.st/bns/theseus.x/extensions/screenshot/updates.json
  https://navigate.st/bns/theseus.x/extensions/screenshot/screenshot-0.2.2.tar.gz
signed 59a35370fdbc9d1e24834fa26c7765d27e8763fe928bfa23b202ca666a6a6973
by the ops key baked into 0.3.19. End-to-end verified via
scratchpad/decoupling-test/verify-live.mjs against the live endpoint:
fetch, sig-verify, download, sha-verify, extract, stage, promote,
backup — all pass.

Installs polling the previous updateURL (addons.silentmode.st) get
this new URL only after their bundled copy is refreshed to 0.2.2,
which means either a Theseus release with 0.2.2 bundled (0.3.20+) or
a signed update at the old URL that carries the URL change (impossible
because addons.silentmode.st doesn't resolve). Ship a Theseus release
that bundles this 0.2.2 to activate the update path on existing
installs; from then on the endpoint self-perpetuates via the theseus.x
URL.

bundled-addons/screenshot/addon.json

@@ -1,13 +1,13 @@
 {
   "id": "screenshot",
   "name": "Screenshot",
-  "version": "0.2.1",
+  "version": "0.2.2",
   "description": "Capture the current tab — visible viewport, entire scrollable page, or a rectangle you draw. Pick a mode from a toolbar dropdown; the capture opens in a full-tab editor (crop, annotate, redact, save).",
   "author": "Silent Mode",
   "icon": "📸",
   "main": "index.js",
   "capabilities": ["toolbar-menu", "capture-tab", "open-tab"],
-  "updateURL": "https://addons.silentmode.st/screenshot/updates.json",
+  "updateURL": "https://navigate.st/bns/theseus.x/extensions/screenshot/updates.json",
   "toolbar-menu": {
     "title": "Screenshot",
     "icon": "📸",

bundled-addons/screenshot/editor.html

@@ -45,7 +45,10 @@
   <!-- Palette -->
   <button class="swatch active" data-color="#d6ff3d" style="background:#d6ff3d" title="Acid"></button>
   <button class="swatch" data-color="#ff3b30" style="background:#ff3b30" title="Red"></button>
+  <button class="swatch" data-color="#ff9500" style="background:#ff9500" title="Orange"></button>
   <button class="swatch" data-color="#ffcc00" style="background:#ffcc00" title="Yellow"></button>
+  <button class="swatch" data-color="#0a84ff" style="background:#0a84ff" title="Blue"></button>
+  <button class="swatch" data-color="#bf5af2" style="background:#bf5af2" title="Purple"></button>
   <button class="swatch" data-color="#ffffff" style="background:#ffffff" title="White"></button>
   <button class="swatch" data-color="#000000" style="background:#000000" title="Black"></button>