fix(01-foundation): revise plans based on checker feedback

- 01-04: wave 3 → 4 (01-03 is also wave 3; parallel executor would race)
- 01-06: wave 4 → 5 (cascades from 01-04 fix); add FeatureTabBase UserControl
  for per-tab progress/cancel strip; bind StatusBar middle item to ProgressStatus
  instead of ConnectionStatus per locked CONTEXT.md decision
- 01-07: wave 5 → 6 (cascades)
- 01-08: wave 6 → 7 (cascades)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.planning/phases/01-foundation/01-04-PLAN.md

@@ -2,7 +2,7 @@
 phase: 01-foundation
 plan: 04
 type: execute
-wave: 3
+wave: 4
 depends_on:
   - 01-02
   - 01-03