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/src/utils/sidebar-project-row-model.ts

@@ -4,6 +4,7 @@ export interface SidebarProjectHostTarget {
   serverId: string;
   projectId: string;
   iconWorkingDir: string;
+  customIconRevision?: string | null;
 }
 
 export type SidebarProjectTrailingAction =
@@ -23,12 +24,18 @@ function hostTarget(input: {
   serverId: string;
   projectId: string;
   iconWorkingDir: string;
+  customIconRevision?: string | null;
 }): SidebarProjectHostTarget | null {
   const iconWorkingDir = input.iconWorkingDir.trim();
   if (!input.serverId || !iconWorkingDir) {
     return null;
   }
-  return { serverId: input.serverId, projectId: input.projectId, iconWorkingDir };
+  return {
+    serverId: input.serverId,
+    projectId: input.projectId,
+    iconWorkingDir,
+    customIconRevision: input.customIconRevision,
+  };
 }
 
 export function resolveSidebarProjectIconTarget(