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

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

packages/app/src/components/workspace-setup-dialog.tsx

@@ -8,7 +8,7 @@ import { FileDropZone } from "@/components/file-drop/file-drop-zone";
 import { Composer } from "@/composer";
 import { useToast } from "@/contexts/toast-context";
 import { useAgentInputDraft } from "@/composer/draft/input-draft";
-import { useProjectIconQuery } from "@/hooks/use-project-icon-query";
+import { useProjectIcon } from "@/projects/icons";
 import { useHostRuntimeClient, useHostRuntimeIsConnected } from "@/runtime/host-runtime";
 import { normalizeWorkspaceDescriptor, useSessionStore } from "@/stores/session-store";
 import { useWorkspaceSetupStore } from "@/stores/workspace-setup-store";
@@ -195,7 +195,7 @@ export function WorkspaceSetupDialog() {
     throw new Error(t("workspaceSetup.errors.composerStateRequired"));
   }
 
-  const { icon: projectIcon } = useProjectIconQuery({
+  const { icon: projectIcon } = useProjectIcon({
     serverId,
     cwd: sourceDirectory,
   });