refactor!: rebrand CCAM to AgentHub

Clean break, no compatibility alias. Renames the product name, the CLI
binary (`ccam` -> `agenthub`), the env var prefix (`CCAM_` ->
`AGENTHUB_`), the Prometheus metric namespace (`ccam_*` ->
`agenthub_*`), the tmux session prefix (`ccam-lane-<id>` ->
`agenthub-lane-<id>`), the per-repo runtime profile directory
(`.ccam/profile` -> `.agenthub/profile`), the lanes state root
(`~/.claude/ccam-lanes` -> `~/.claude/agenthub-lanes`), the bundled
plugins (`plugins/ccam*` -> `plugins/agenthub*`) and their slash
commands (`/ccam-doctor` -> `/agenthub-doctor`, `/ccam:*` ->
`/agenthub:*`).

Because there is no alias, an existing install has to be updated by
hand: rename its `.ccam/profile` directory and any `CCAM_*` variables,
and reinstall the plugin under its new name.

Two other name families are deliberately left alone here, since they are
not just strings: the `Claude-Code-Monitor` repository/marketplace name,
and the `agent-dashboard` npm package plus its `~/.claude/agent-dashboard`
runtime directory, which holds the live database and needs a migration
rather than a rename.

Verified: server 1406/1406, client 459/459, `grep -i ccam` clean across
tracked files, `openapi.yaml` regenerated (95 paths, unchanged count).

server/lib/pty-run.js

@@ -13,9 +13,9 @@
  * exists but its pane sits at a shell prompt, the argv is typed into that
  * pane instead of being dropped on the floor by a silent adopt.
  *
- * Every session is named `ccam-lane-<laneId>` so a real terminal can attach
- * to the exact same session (`tmux attach -t ccam-lane-<id>`, or
- * `ccam lanes shell`) — that's the whole point: the dashboard both creates
+ * Every session is named `agenthub-lane-<laneId>` so a real terminal can attach
+ * to the exact same session (`tmux attach -t agenthub-lane-<id>`, or
+ * `agenthub lanes shell`) — that's the whole point: the dashboard both creates
  * the session (one-click Start/Resume) and is just one of possibly several
  * attached clients tmux already keeps in sync.
  *
@@ -33,7 +33,7 @@ try {
   /* db-less environment, skip persistence */
 }
 
-const RUN_ID_RE = /^ccam-lane-(\d+)$/;
+const RUN_ID_RE = /^agenthub-lane-(\d+)$/;
 const EFFORT_LEVELS = new Set(["low", "medium", "high", "xhigh", "max"]);
 const ALLOWED_PERMISSION_MODES = new Set(["acceptEdits", "default", "plan", "bypassPermissions"]);
 // Pane commands that mean "idle shell prompt, safe to type a command into".
@@ -45,7 +45,7 @@ const CODEX_APPROVALS = new Set(["on-request", "never"]);
 const CODEX_EFFORTS = new Set(["low", "medium", "high", "xhigh"]);
 
 function runIdForLane(laneId) {
-  return `ccam-lane-${laneId}`;
+  return `agenthub-lane-${laneId}`;
 }
 
 function laneIdFromRunId(id) {
@@ -216,18 +216,18 @@ function spawnRun(args) {
     });
   };
 
-  // Every pane the dashboard starts carries its lane id. A `ccam stage` call
+  // Every pane the dashboard starts carries its lane id. A `agenthub stage` call
   // from inside it then resolves the lane exactly, instead of matching on cwd —
   // which is ambiguous now that one directory can back both a `claude` lane and
-  // a `codex` lane (see bin/ccam.js's resolveLaneArg).
-  const env = { CCAM_LANE_ID: String(laneId) };
+  // a `codex` lane (see bin/agenthub.js's resolveLaneArg).
+  const env = { AGENTHUB_LANE_ID: String(laneId) };
 
   if (!tmux.hasSession(id)) {
     tmux.newSession({ name: id, cwd, argv, env });
     record();
   } else if (SHELL_COMMANDS.has(tmux.paneCommand(id) || "")) {
     // The session exists but its pane is sitting at a bare shell prompt — a
-    // `ccam lanes shell`, or a `claude` that already exited. Adopting it
+    // `agenthub lanes shell`, or a `claude` that already exited. Adopting it
     // silently here would swallow the whole request: a Resume would spawn no
     // `--resume` and an initial prompt would never be typed, while the API
     // still answered 200. Run the argv in the pane the user already sees
@@ -278,7 +278,7 @@ function getRun(id) {
 
 /** Computed fresh from tmux state every call — see file header. */
 function listRuns() {
-  return tmux.listSessions("ccam-lane-").map(publicRun);
+  return tmux.listSessions("agenthub-lane-").map(publicRun);
 }
 
 module.exports = {