docs(limits): state when the 462 ceiling holds; skill docs follow CODEMAN_MAX_SESSIONS

The tab layout's 512 refs also count pinned sessions kept as stopped records, so
the ceiling holds at the default MAX_WEBVIEWS and with no pinned closed sessions.
SKILL.md, verbs.md (both copies) and the cron guide no longer give a fixed 50/25.

Co-Authored-By: Christian Haberl <116439789+christianhaberl@users.noreply.github.com>
Co-Authored-By: Claude <noreply@anthropic.com>

docs/cron-guide.md

@@ -284,7 +284,7 @@ automatically after **Run Now**.
 > ⚠️ **Session-cap math if you disable auto-close.** With
 > `autoClosePreviousSession: false`, nothing ever closes the sessions a
 > recurring job creates — an interval job every 30 min creates 48 tabs/day and
-> hits the global 50-session cap in ~25 hours (sooner with existing tabs), after
+> hits the global session cap (50 by default, `CODEMAN_MAX_SESSIONS`) in ~25 hours (sooner with existing tabs), after
 > which **every** fire of **every** job fails with "Maximum concurrent sessions
 > reached" until you delete tabs by hand. Leave auto-close on for unattended
 > recurring jobs, or clean up sessions yourself.

docs/wiki/Settings-Reference.md

@@ -221,7 +221,7 @@ Some things are configured before the server starts, not in the UI:
 | `CODEMAN_FILE_PICKER_ROOTS`         | Extra roots for the path picker.                                        |
 | `CODEMAN_ALLOW_UNAUTHENTICATED_NETWORK` | Acknowledges exposing the server with no password.                  |
 | `CODEMAN_BASE_URL`                  | Mounts Codeman under a sub-path behind a reverse proxy that forwards the prefix unchanged. See [Remote Access](Remote-Access). |
-| `CODEMAN_MAX_SESSIONS`              | Cap on concurrent sessions. 50 by default, 1 to 462 (a larger value is clamped to 462, anything that is not a positive integer falls back to 50). Read at startup. In multi-user mode the per-user cap defaults to half of it unless `CODEMAN_MAX_SESSIONS_PER_USER` is set. |
+| `CODEMAN_MAX_SESSIONS`              | Cap on concurrent sessions. 50 by default, 1 to 462 (a larger value is clamped to 462, anything that is not a positive integer falls back to 50). Read at startup. The 462 assumes the default `CODEMAN_MAX_WEBVIEWS` and no pinned closed sessions, which share the same 512-entry tab layout. In multi-user mode the per-user cap defaults to half of it unless `CODEMAN_MAX_SESSIONS_PER_USER` is set. |
 | `CODEMAN_MAX_DOWNLOAD_BYTES`        | Cap on raw file bodies and downloads. 2 GB by default, `0` for none.    |
 | `CODEMAN_MAX_PASTE_IMAGE_BYTES`     | Cap on one pasted, dropped or attached image or document. 50 MB by default. |
 | `CODEMAN_MAX_PASTE_VIDEO_BYTES`     | Cap on one attached video (phone Attach, drop). 1 GB by default; videos stream to disk, so this bounds disk use, not memory. |