MCPManager.disconnectAll clears connections without notifying the session's
prompt-command consumer, so removed or disabled prompt servers left stale
/server:prompt commands after /reload-plugins and /mcp reload.
Clear the session MCP prompt-command registry immediately after disconnect and
before asynchronous rediscovery. Newly loaded prompts repopulate it through
the existing manager callback. Extend the reload regression coverage.
Fixes#7189
reloadServers() rediscovered MCP with no options, so loadAllMCPConfigs
defaulted enableProjectConfig to true — /reload-plugins (and /mcp reload)
could start project .mcp.json servers a user opted out of.
Derive discovery filters (enableProjectConfig, filterExa, filterBrowser)
from ctx.settings before reconnecting, matching startup discovery. Added a
regression test asserting the opt-out is forwarded.
Fixes#7189
/reload-plugins documents MCP in its reload scope but the TUI handler only
reset skill/command/capability caches and never reconnected MCP servers or
refreshed the session MCP tool registry, so .mcp.json edits stayed inactive
until process restart.
Route the TUI reload pipeline through a shared reloadTuiPluginState() helper
that also runs the disconnect/rediscover/refreshMCPTools path used by
/mcp reload, exposed as MCPCommandController.reloadServers().
Fixes#7189
roboomp