Support Remote browser and media keys and connection history UI

Accept the eighteen browser, volume, media and launch identities in the input vocabulary and both SDKs. Exercise media-key capture on the private Xorg harness, and permit only the new remember-host checkbox in the connection form integration test.

Validated: affected-package race tests, Tentacles make check, private native_remote_input.py and native_remote_keys.py. Physical input, live peer interoperability, speech and Braille acceptance remain pending.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

internal/tentaclewire/remote_key_test.go

@@ -22,6 +22,10 @@ func TestRemoteKeySDKValidation(t *testing.T) {
 		{`{"name":"Control_R","pressed":false}`, true},
 		{`{"name":"KP_Enter","pressed":true}`, true},
 		{`{"name":"semicolon","pressed":false}`, true},
+		{`{"name":"XF86AudioRaiseVolume","pressed":true}`, true},
+		{`{"name":"XF86Calculator","pressed":false}`, true},
+		{`{"name":"XF86Eject","pressed":true}`, false},
+		{`{"name":"XF86PowerOff","pressed":true}`, false},
 		{`{"name":"Prior","pressed":true}`, false},
 		{`{"name":"A","pressed":true}`, false},
 		{`{"name":"F01","pressed":true}`, false},