Let each install pick its app icon

Settings > General gets an App icon (super admin): one of the seven
stones, or an uploaded image with the picked stone as a top-left corner
mark (inside a round launcher's crop, clear of the browser's badge),
previewed in both launcher crops before saving.

Uploads are decoded and cropped to a stored square (no SVG); the set is
drawn into DATA_DIR/install-icon/<version>/ and served publicly and
immutable. The manifest, head icon links and push notifications point at
it; the ember stone keeps the stock icons. The generator shares the icon
renderer.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

src/types/index.ts

@@ -36,6 +36,7 @@ import type { BotFace, BotMessageReactionEmoji } from "../dict/bot-dict";
 import type { HarnessCallSettings, TokenUsageSummary } from "../harness/usage/types";
 import type { McpServerStatus, McpTransport } from "../dict/mcp-dict";
 import type { ExtensionProposalKind, ExtensionProposalStatus } from "../dict/extension-proposal-dict";
+import type { PwaInstallIcon } from "../data/pwa-data";
 import type {
     CustomToolHttpMethod,
     CustomToolKind,
@@ -1443,6 +1444,11 @@ export type PagePropsType = {
      * General, and the root's head tags). Empty when never named.
      */
     install_name?: string | null;
+    /**
+     * The icon the install goes by as an installed app (Settings >
+     * General, and the root's icon links).
+     */
+    install_icon?: PwaInstallIcon | null;
     /**
      * The release the server is running, for the General settings page.
      */