feat: add remote trust and server identity pinning

- Add SSH-style server identity keys and known-host verification for remote serve endpoints.
- Add remote add/list/remove commands for explicit endpoint persistence.
- Fix remote clients listing to fan out through target discovery instead of ambiguous auto-routing.
- Add URL glob matching for tabs filter and count with extension tests.
- Add n8n credential pinning for server public keys or SHA256 fingerprints.
- Remove obsolete compat shim behavior while keeping empty compat seams for future protocol changes.
- Bump browser-cli to 0.16.4 and n8n node to 0.3.1.
- Cover known-hosts, remote registry, compat seams, n8n protocol verification, and URL matching with tests.

README.md

@@ -196,8 +196,9 @@ browser-cli search so click choices
 ```sh
 browser-cli tabs list                        # list all open tabs (all windows)
 browser-cli tabs count                       # count all tabs
-browser-cli tabs count youtube               # count tabs matching URL pattern
-browser-cli tabs filter youtube              # list tabs matching URL pattern
+browser-cli tabs count youtube               # count tabs whose URL contains "youtube"
+browser-cli tabs filter youtube              # list tabs whose URL contains "youtube"
+browser-cli tabs filter 'twitch.tv/*'        # glob: list every twitch.tv tab
 browser-cli tabs query "pull request"        # search tabs by URL or title
 
 browser-cli tabs active 1234                 # switch browser focus to tab
@@ -219,6 +220,10 @@ browser-cli tabs sort --by time
 browser-cli tabs merge-windows               # pull all tabs into the current window
 ```
 
+> URL patterns for `tabs filter` / `tabs count` match against the full tab URL.
+> A plain string is a case-sensitive substring (`youtube`); a pattern containing
+> `*` or `?` is treated as a glob (`twitch.tv/*`, `*.twitch.tv`).
+
 ### Tab groups
 ```sh
 browser-cli groups list                      # list all tab groups