✅ Update progress documentation and mark Step 3 as completed in project tracker

docs/projects/Pokedex.Online/PROGRESS.md

@@ -7,7 +7,7 @@ Last Updated: January 28, 2026
 **Total Phases:** 12  
 **Completed Phases:** 1 (In Progress)  
 **Total Steps:** 68  
-**Completed Steps:** 4 / 68 (5.9%)
+**Completed Steps:** 5 / 68 (7.4%)
 
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@@ -31,10 +31,10 @@ Last Updated: January 28, 2026
 - [x] Added test scripts to package.json
 
 ### ✅ Step 3: Split package.json Dependencies
-- [ ] Create `server/package.json` (backend only)
-- [ ] Update root package.json (frontend only)
-- [ ] Configure npm workspaces
-- [ ] Test both installs independently
+- [x] Create `server/package.json` (backend only)
+- [x] Update root package.json (frontend only)
+- [x] Configure npm workspaces
+- [x] Test both installs independently
 
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