Display AI-assigned expertise tags on project detail page

- Add projectTags relation to project.get query
- Show expertise tags with confidence percentages
- Tags displayed with their assigned colors

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/server/routers/project.ts

@@ -222,6 +222,14 @@ export const projectRouter = router({
               },
             },
           },
+          projectTags: {
+            include: {
+              tag: {
+                select: { id: true, name: true, category: true, color: true },
+              },
+            },
+            orderBy: { confidence: 'desc' },
+          },
         },
       })