chore(plans): instance picker — all tasks complete, gate evidence

Claude-Session: https://claude.ai/code/session_01NcMG6xXdsJbmD2wYAgkK29

docs/plans/2026-09-08-instance-picker.md.tasks.json

@@ -25,7 +25,7 @@
     {
       "id": 4,
       "subject": "Task 4: Wire Flow Debugger to the picker",
-      "status": "in_progress",
+      "status": "completed",
       "blockedBy": [
         3
       ]
@@ -33,7 +33,7 @@
     {
       "id": 5,
       "subject": "Task 5: Wire Debug View to the picker",
-      "status": "in_progress",
+      "status": "completed",
       "blockedBy": [
         3
       ]
@@ -41,7 +41,7 @@
     {
       "id": 6,
       "subject": "Task 6: Playwright tests drive the picker",
-      "status": "in_progress",
+      "status": "completed",
       "blockedBy": [
         3
       ]
@@ -49,7 +49,7 @@
     {
       "id": 7,
       "subject": "Task 7: Docs",
-      "status": "in_progress",
+      "status": "completed",
       "blockedBy": [
         3
       ]
@@ -57,7 +57,7 @@
     {
       "id": 8,
       "subject": "Task 8: Gate (controller)",
-      "status": "pending",
+      "status": "completed",
       "blockedBy": [
         4,
         5,