fix(ux): resolve tickets #51 #53 #54 from gitlooper sweep

- #51: Add permanent redirect /login → /auth/signin in next.config.ts
  so users/testers who type the common alias land on the correct auth page
- #53: Add "Allocations → New Planning Entry" link to empty states of
  ProjectDemandsTable and ProjectAssignmentsTable; add shortcut link in
  demands table header for canEdit users
- #54: Track confirmed dropdown selection in ResourcePersonPicker —
  green ring + checkmark icon shown when user picks from suggestions;
  cleared on any manual keypress so free-text is clearly unconfirmed

Co-Authored-By: claude-flow <ruv@ruv.net>

apps/web/next.config.ts

@@ -18,6 +18,12 @@ const nextConfig: NextConfig = {
     "@capakraken/ui",
   ],
   typedRoutes: true,
+  async redirects() {
+    return [
+      // Common URL alias — redirect to the real auth entry point
+      { source: "/login", destination: "/auth/signin", permanent: true },
+    ];
+  },
   async headers() {
     return [
       {