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/components/icon.tsx

@@ -36,6 +36,8 @@ import {
 	ArrowLeft,
 	DotsSixVertical,
 	Bell,
+	CaretDown,
+	CaretRight,
 } from "@phosphor-icons/react";
 
 export type IconName =
@@ -79,7 +81,9 @@ export type IconName =
 	| "terminal"
 	| "arrow-left"
 	| "drag"
-	| "bell";
+	| "bell"
+	| "chevron-down"
+	| "chevron-right";
 
 const iconMap: Record<
 	IconName,
@@ -129,6 +133,8 @@ const iconMap: Record<
 	"arrow-left": ArrowLeft,
 	drag: DotsSixVertical,
 	bell: Bell,
+	"chevron-down": CaretDown,
+	"chevron-right": CaretRight,
 };
 
 export interface IconProps {