v0.2.0 — Plugin & Agent identity

First release to use Wave 2.0 Plugin & Agent identity — EvoNexus now renders plugin icon in the plugin card/detail, and PM Nova shows her own avatar in the agent chat and listing.

Added

• ui/assets/icon.png — 128×128 PNG plugin icon (kanban-style flat design, Evolution green #00FFA7 on dark #0d1117). Served by the existing /plugins/pm-essentials/ui/<path> endpoint.
• ui/assets/avatars/pm-nova.png — 256×256 PNG avatar for PM Nova agent. Injected into the frontend agent registry via GET /api/agent-meta and rendered in chat bubbles and the /agents page.
• metadata.icon and agents[].avatar fields in plugin.yaml, both with *_sha256 for tamper detection (verified by plugin-health).

Notes

• Requires EvoNexus core with Wave 2.0 schema support (branch feature/plugins-v1, merge pending). Installs cleanly on older cores — metadata and agents are optional fields; the icon simply won't appear until the core is updated.
• Browser cache for assets is max-age=3600 immutable. After update from v0.1.x the new icon appears within 1 hour, or immediately on hard refresh.