feat: enhance spec regeneration management by project

- Refactored spec regeneration status tracking to support multiple projects using a Map for running states and abort controllers.
- Updated `getSpecRegenerationStatus` to accept a project path, allowing retrieval of status specific to a project.
- Modified `setRunningState` to manage running states and abort controllers per project.
- Adjusted related route handlers to utilize project-specific status checks and updates.
- Introduced a new Graph View page and integrated it into the routing structure.
- Enhanced UI components to reflect the current project’s spec generation state.

apps/ui/src/components/views/board-view/board-controls.tsx

@@ -1,16 +1,12 @@
 import { Button } from '@/components/ui/button';
 import { Tooltip, TooltipContent, TooltipProvider, TooltipTrigger } from '@/components/ui/tooltip';
-import { ImageIcon, Archive, Columns3, Network } from 'lucide-react';
-import { cn } from '@/lib/utils';
-import { BoardViewMode } from '@/store/app-store';
+import { ImageIcon, Archive } from 'lucide-react';
 
 interface BoardControlsProps {
   isMounted: boolean;
   onShowBoardBackground: () => void;
   onShowCompletedModal: () => void;
   completedCount: number;
-  boardViewMode: BoardViewMode;
-  onBoardViewModeChange: (mode: BoardViewMode) => void;
 }
 
 export function BoardControls({
@@ -18,59 +14,12 @@ export function BoardControls({
   onShowBoardBackground,
   onShowCompletedModal,
   completedCount,
-  boardViewMode,
-  onBoardViewModeChange,
 }: BoardControlsProps) {
   if (!isMounted) return null;
 
   return (
     <TooltipProvider>
       <div className="flex items-center gap-2">
-        {/* View Mode Toggle - Kanban / Graph */}
-        <div
-          className="flex items-center rounded-lg bg-secondary border border-border"
-          data-testid="view-mode-toggle"
-        >
-          <Tooltip>
-            <TooltipTrigger asChild>
-              <button
-                onClick={() => onBoardViewModeChange('kanban')}
-                className={cn(
-                  'p-2 rounded-l-lg transition-colors',
-                  boardViewMode === 'kanban'
-                    ? 'bg-brand-500/20 text-brand-500'
-                    : 'text-muted-foreground hover:text-foreground hover:bg-accent'
-                )}
-                data-testid="view-mode-kanban"
-              >
-                <Columns3 className="w-4 h-4" />
-              </button>
-            </TooltipTrigger>
-            <TooltipContent>
-              <p>Kanban Board View</p>
-            </TooltipContent>
-          </Tooltip>
-          <Tooltip>
-            <TooltipTrigger asChild>
-              <button
-                onClick={() => onBoardViewModeChange('graph')}
-                className={cn(
-                  'p-2 rounded-r-lg transition-colors',
-                  boardViewMode === 'graph'
-                    ? 'bg-brand-500/20 text-brand-500'
-                    : 'text-muted-foreground hover:text-foreground hover:bg-accent'
-                )}
-                data-testid="view-mode-graph"
-              >
-                <Network className="w-4 h-4" />
-              </button>
-            </TooltipTrigger>
-            <TooltipContent>
-              <p>Dependency Graph View</p>
-            </TooltipContent>
-          </Tooltip>
-        </div>
-
         {/* Board Background Button */}
         <Tooltip>
           <TooltipTrigger asChild>