feat: workspace-first UI refresh - PR-3 projects page + routing cleanup

- Rewrite ProjectsPage with inline repository and workspace display
- Expandable project cards showing repos + workspace chips
- Inline workspace creation from project page (New Workspace button per repo)
- Workspace chips link to workspace detail page
- Sync/delete actions on workspace chips
- Update Project type: add ProjectWithRepos, RepositorySummary, WorkspaceSummary
- Update listProjects API to return ProjectWithRepos[]
- Update dashboard, sessions, config-profiles to use ProjectWithRepos
- Remove old /projects/:projectId route (RepoWorkspace)
- Add chevron icons to Icon component
- Projects page CSS: project-toggle, repo-block, workspace-grid, workspace-chip
- TypeScript + eslint clean

Quality gates: tsc --noEmit clean, eslint clean

apps/web/src/pages/sessions.tsx

@@ -1,7 +1,7 @@
 import { useCallback, useEffect, useMemo, useState } from "react";
 
 import { listProjects } from "../api/projects";
-import type { Project } from "../types";
+import type { ProjectWithRepos } from "../types";
 import { listRepositories, type GitRepository } from "../api/git_repositories";
 import {
   getUserSessions,
@@ -24,7 +24,7 @@ export const SessionsPage = () => {
   const [sessions, setSessions] = useState<Session[]>([]);
   const [lastSessionId, setLastSessionId] = useState<string | null>(null);
 
-  const [projects, setProjects] = useState<Project[]>([]);
+  const [projects, setProjects] = useState<ProjectWithRepos[]>([]);
   const [repositories, setRepositories] = useState<GitRepository[]>([]);
   const [toolTypes, setToolTypes] = useState<ToolType[]>([]);
   const [selectedProject, setSelectedProject] = useState<string>("");