feat: add status line with agent display + fix pa-mode keybind

Status line shows: [agent-name] Model | X% context
- Added statusline.sh script that reads CLAUDE_AGENT env var
- Configured settings.json to use the status line script

Fixed pa-mode keybind issue (terminal closing immediately):
- Changed from detached session + attach to exec tmux -A
- Using exec replaces shell process, keeping terminal open
- Added CLAUDE_AGENT env var export for status line

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

settings.json

@@ -1,4 +1,5 @@
 {
+  "model": "opus",
   "enabledPlugins": {
     "frontend-design@claude-plugins-official": true,
     "typescript-lsp@claude-plugins-official": true,
@@ -6,62 +7,9 @@
     "superpowers@superpowers-marketplace": true
   },
   "alwaysThinkingEnabled": true,
-  "model": "opus",
-  "agents": {
-    "k8s-orchestrator": {
-      "model": "opus",
-      "promptFile": "agents/k8s-orchestrator.md",
-      "description": "Central orchestrator for K8s cluster management tasks"
-    },
-    "k8s-diagnostician": {
-      "model": "sonnet",
-      "promptFile": "agents/k8s-diagnostician.md",
-      "description": "Cluster health, pod/node status, log analysis"
-    },
-    "argocd-operator": {
-      "model": "sonnet",
-      "promptFile": "agents/argocd-operator.md",
-      "description": "ArgoCD app sync, deployments, rollbacks"
-    },
-    "prometheus-analyst": {
-      "model": "sonnet",
-      "promptFile": "agents/prometheus-analyst.md",
-      "description": "Metrics queries, alert analysis, trends"
-    },
-    "git-operator": {
-      "model": "sonnet",
-      "promptFile": "agents/git-operator.md",
-      "description": "Git commits, PRs, manifest management"
-    }
+  "statusLine": {
+    "type": "command",
+    "command": "~/.claude/automation/statusline.sh"
   },
-  "autonomy": {
-    "safe_actions": [
-      "get",
-      "describe",
-      "logs",
-      "list",
-      "top",
-      "diff",
-      "refresh"
-    ],
-    "confirm_actions": [
-      "delete",
-      "patch",
-      "edit",
-      "scale",
-      "rollout",
-      "apply",
-      "sync",
-      "commit",
-      "push",
-      "create-pr"
-    ],
-    "forbidden_actions": [
-      "drain",
-      "cordon",
-      "delete node",
-      "reset",
-      "delete namespace"
-    ]
-  }
+  "_note": "Agent definitions moved to ~/.claude/agents/*.md with YAML frontmatter. Autonomy levels now in ~/.claude/state/autonomy-levels.json"
 }