fix: orchestrator button + Pi SDK session error

- Move leftSidebarMode from URL state to local useState in unified-shell,
    avoiding force-dynamic router round-trip that made the button appear broken                                           - Replace fileURLToPath(new URL(..., import.meta.url)) with process.cwd()
    in bb-pi-bootstrap.ts — import.meta.url is a webpack:// URL in Next.js,
    causing cross-realm TypeError when passed to Node.js fileURLToPath()

docs/plans/2026-03-07-phase-5-agent-presence.md

@@ -0,0 +1,76 @@
+# Phase 5 - Agent Presence in Social/Graph Views
+
+**Status:** Planning
+**Created:** 2026-03-07
+**Goal:** Show active agents in social cards, graph nodes, and make agent activity visible across the UI
+
+---
+
+## Current State
+
+- Agent status panel exists in right panel (for epic/swarm context)
+- Agents have display names (Engineer 01, etc.)
+- Agent instances tracked in `.beads/agents.jsonl`
+- No visibility in main social/graph views
+
+---
+
+## Implementation Plan
+
+### Step 1: Agent Badge on Social Cards
+When a bead has an active agent assigned, show:
+- Agent icon/avatar
+- Display name (Engineer 01)
+- Status indicator (working, blocked, etc.)
+
+**Files:**
+- `src/components/social/social-card.tsx` - add agent badge
+- `src/lib/types.ts` - ensure agentInstanceId on BeadIssue
+
+### Step 2: Agent Indicator on Graph Nodes
+Show agent presence on graph nodes:
+- Small icon when agent assigned
+- Tooltip shows agent name and status
+- Color coding by status
+
+**Files:**
+- `src/components/graph/graph-view.tsx`
+- Node rendering logic
+
+### Step 3: Agent Activity in Activity Panel
+If activity panel exists, show agent events:
+- "Engineer 01 started working on BEAD-001"
+- "Reviewer 01 completed review of BEAD-005"
+
+**Files:**
+- Check if activity panel still exists or needs rebuilding
+
+### Step 4: Agent Filter/View
+Add filter option to show only beads with active agents:
+- "Show my agents" filter in social view
+- Highlight beads with active work
+
+**Files:**
+- `src/components/social/social-page.tsx`
+- Filter controls
+
+---
+
+## Blocked Items
+
+None identified.
+
+---
+
+## Success Criteria
+
+- [ ] Social cards show agent badge when agent assigned
+- [ ] Graph nodes show agent indicator
+- [ ] Agent status visible at a glance
+- [ ] Can filter by "has active agent"
+
+---
+
+## Estimated Effort
+
+2-3 hours