feat: project settings page with paseo.json editor

Adds a Projects settings flow for inspecting and editing per-project
paseo.json (worktree setup/teardown, scripts, terminals) directly from the
app. Reads/writes go through new daemon RPCs with revision-based optimistic
concurrency, and the screen always keeps its header and host picker visible
so a hung host doesn't trap the user.

packages/app/src/utils/sidebar-project-row-model.test.ts

@@ -13,6 +13,7 @@ function workspace(overrides: Partial<SidebarWorkspaceEntry> = {}): SidebarWorks
     workspaceKey: "srv:ws-root",
     serverId: "srv",
     workspaceId: "ws-root",
+    projectKey: "project-1",
     workspaceDirectory: "/repo",
     projectKind: "git",
     workspaceKind: "checkout",