docs(#1110): update README diagram; add animated SVG component diagram

README: fix stale ASCII diagram
- hm1nd → h-ruth (manager container name, post-#1014 rename)
- per-agent web UIs now route through hive-gateway unix sockets, not
  direct :8100-8999 TCP (HIVE_WEB_SOCKET is now unconditional)
- split into 'optional containers' and 'agent containers' sections
- add hive-gateway, hive-forge, hive-matrix rows

New: branding/component-diagram.svg — extended animated diagram
for website use (as suggested in the issue). Matches the existing
hyperhive branding aesthetic (dark #0a0600 bg, amber #ffb300 accents,
monospace, scanlines). Shows:
- host machine frame with hive-c0re as central hub
- optional containers: gateway, forge, matrix
- agent containers: h-ruth, h-iris, h-damocles, h-<name>
- animated dots flowing along connection paths (broker messages,
  HTTP proxying, config pushes)
- pulsing glow ring on hive-c0re
- legend panel

README.md

@@ -21,16 +21,21 @@ the substrate.
 host (NixOS, runs hive-c0re.service)
 │
 ├── operator
-│   ├── browser → :7000          hive-c0re dashboard
-│   ├── browser → :8100-8999     per-agent web UIs (all agents, FNV-1a hash)
+│   ├── browser → :80 (hive-gateway)    dashboard + per-agent UIs
+│   │                                   /agent/<name>/ → per-agent unix socket
 │   └── CLI     → /run/hyperhive/host.sock   admin protocol
 │
 ├── hive-c0re  (Rust daemon: lifecycle / broker / approvals /
 │               auto-update / dashboard / sockets)
 │
-└── nixos-containers
-    ├── hm1nd      manager agent (privileged MCP surface)
-    └── h-<name>   sub-agent (vanilla MCP surface + per-agent extras)
+├── optional containers
+│   ├── hive-gateway   nginx — proxies :80 → c0re dashboard + per-agent sockets
+│   ├── hive-forge     Forgejo — per-agent accounts, config mirror (agent-configs/)
+│   └── hive-matrix    tuwunel — Matrix homeserver + per-agent accounts
+│
+└── agent containers
+    ├── h-ruth     manager (privileged MCP surface, approval gating)
+    └── h-<name>   sub-agent (claude + MCP tools + per-agent web UI + unix socket)
 ```
 
 Depth lives in [`docs/`](docs/) — pick the one matching your task: