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/projects.ts

@@ -24,6 +24,7 @@ export interface ProjectHostEntry {
   workspaces: WorkspaceSummary[];
   gitRuntime?: WorkspaceDescriptor["gitRuntime"];
   githubRuntime?: WorkspaceDescriptor["githubRuntime"];
+  customIconRevision?: string | null;
 }
 
 export interface ProjectSummary {
@@ -85,6 +86,7 @@ interface HostGroup {
   serverName: string;
   isOnline: boolean;
   workspaces: WorkspaceDescriptor[];
+  customIconRevision?: string | null;
   // Repo root for a project parent that has no workspaces yet. Without it the
   // host's repoRoot resolves to "" and the project reads as non-editable.
   fallbackRepoRoot: string;
@@ -156,6 +158,7 @@ function toHostEntry(group: HostGroup): ProjectHostEntry {
     workspaces: group.workspaces.map(toWorkspaceSummary),
     gitRuntime: canonical?.gitRuntime,
     githubRuntime: canonical?.githubRuntime,
+    customIconRevision: canonical?.projectCustomIconRevision ?? group.customIconRevision,
   };
 }
 
@@ -219,6 +222,7 @@ function addHostProjects(
         serverName: host.serverName,
         isOnline: host.isOnline,
         workspaces: [],
+        customIconRevision: placement.customIconRevision,
         fallbackRepoRoot: repoRootByProjectId.get(projectId) ?? "",
       });
     }