rename(162): drop HIVE_PORT fallback; sweep remaining hm1nd in docs

docs/agent-hierarchy.md

@@ -47,7 +47,7 @@ viewers see the tree repaint without polling
 (`ContainerView.parent` is sourced from `topology.json`).
 
 **Today's caveat:** the move is purely a JSON edit. Only the
-top-level manager (`hm1nd`) gets `/var/lib/hyperhive/agents`
+top-level manager (`root`) gets `/var/lib/hyperhive/agents`
 bind-mounted at `/agents` in its container, so sub-agents don't yet
 see their would-be children's state. Once sub-manager bind mounts
 land alongside cap enforcement, `set_parent` grows a companion
@@ -105,12 +105,12 @@ which axis the post-milestone version reads each special-case along:
 ### A — naming + bootstrap
 
 - `MANAGER_AGENT = "manager"` (broker recipient name) and
-  `MANAGER_NAME = "hm1nd"` (container name). ~28 grep hits across
-  `hive-c0re/src/`. **Just a name** — the rename plan is `manager` →
-  `root`, executed via the one-shot migration script in
-  `migrate.rs` (idempotent, marker-guarded).
+  `MANAGER_NAME = "root"` (container name). ~28 grep hits across
+  `hive-c0re/src/`. **Just a name** — renamed from `hm1nd` to `root`
+  via the one-shot migration script in `migrate.rs` (idempotent,
+  marker-guarded).
 - `auto_update::ensure_manager` runs at hive-c0re boot and spawns
-  `hm1nd` if missing. Becomes "ensure the root agent exists" once any
+  `root` if missing. Becomes "ensure the root agent exists" once any
   agent can be at the root. **Topology**: root has no parent, so
   hive-c0re itself owns its lifecycle (no parent to delegate to).
 
@@ -235,12 +235,9 @@ repos they're working on.
 
 `nixosConfigurations.manager` must build standalone (without the
 meta-flake's per-agent flake.nix wrapper). For the manager unit
-that means hardcoded `HIVE_PORT` / `HIVE_LABEL` env values:
+that means a hardcoded `HIVE_LABEL` env value:
 
-- `HIVE_PORT = "8875"` — FNV-1a(`"hm1nd"`) % 900 + 8100, matching
-  `lifecycle::agent_web_port`. Sub-agents have the same shape via
-  the meta-flake-generated `applied/<name>/flake.nix`.
-- `HIVE_LABEL = "hm1nd"` — container name; matches what `meta.rs`
+- `HIVE_LABEL = "root"` — container name; matches what `meta.rs`
   injects at deploy time.
 
 Real deploys never read these — `meta::render_flake` overrides them