feat: add host-local custom project icons (#2335)

* feat(projects): add local icons and colors

* refactor(projects): simplify appearance handling

* fix(projects): serialize appearance saves

* test(app): update project appearance expectations

* test: fix project appearance CI expectations

* refactor(projects): organize appearance code

* fix(server): adopt main's reconcile model in project appearance updates

* fix(projects): preserve host-local appearance targets

* fix(desktop): restore Linux development startup

Ubuntu can block Electron's unprivileged user-namespace fallback while the npm-installed sandbox helper is not SUID. Disable the Chromium process sandbox only in the Linux development runner so packaged desktop policy remains unchanged.

* feat(projects): add custom project icons

Keep URL acquisition in the client so the host daemon only validates uploaded bytes. Project name and icon changes share one adaptive edit sheet.

* refactor(settings): scope projects by host

---------

Co-authored-by: Mohamed Boudra <boudra.moha@gmail.com>

packages/app/e2e/sidebar-project-grouping.spec.ts

@@ -9,11 +9,11 @@ import {
   expectProjectWorkspaceCountForHost,
   expectSeparateProjects,
   openGroupedProjectSettings,
+  openProjectsForSettingsHost,
   openProjectDirectory,
   openProjectDirectoryWithHosts,
   renameProject,
   selectWorkspaceHost,
-  switchProjectSettingsHost,
 } from "./helpers/project-grouping";
 import { type IsolatedHostDaemon, startIsolatedHostDaemon } from "./helpers/isolated-host-daemon";
 import { connectSeedClient, type SeedDaemonClient } from "./helpers/seed-client";
@@ -380,10 +380,18 @@ test.describe("Sidebar project grouping", () => {
 
   test("renames only the selected host's grouped project", async ({ page, crossHostProject }) => {
     await openScenario(page, crossHostProject);
-    await openGroupedProjectSettings(page, GROUPED_PROJECT_NAME);
+    await openGroupedProjectSettings(page, {
+      serverId: getServerId(),
+      projectName: GROUPED_PROJECT_NAME,
+    });
     await renameProject(page, "Primary-only project name");
     await expectProjectSettingsName(page, "Primary-only project name");
-    await switchProjectSettingsHost(page, SECONDARY_HOST_LABEL);
+    const secondaryHost = crossHostProject.hosts[0];
+    if (!secondaryHost) throw new Error("Expected a secondary host");
+    await openProjectsForSettingsHost(page, {
+      serverId: secondaryHost.serverId,
+      projectName: GROUPED_PROJECT_NAME,
+    });
     await expectProjectSettingsName(page, GROUPED_PROJECT_NAME);
   });