fix(opencode): update msgfmt for latest version

lib/msgfmt/message_box.go

@@ -63,17 +63,17 @@ func removeCodexInputBox(msg string) string {
 
 func removeOpencodeMessageBox(msg string) string {
 	lines := strings.Split(msg, "\n")
-	// Check the last 3 lines for
 	//
-	//  ┃                                                                      ┃
-	//  ┃ >                                                                    ┃
-	//  ┃                                                                      ┃
-	// We only check for the first ┃ and then an empty line above it - as sometimes the full input block does not load within a snapshot,
-	// this leads to displaying a bunch of newlines.
-	for i := len(lines) - 1; i >= 2; i-- {
-		if strings.ReplaceAll(lines[i-2], " ", "") != "┃┃" &&
-			strings.ReplaceAll(lines[i], " ", "") == "┃┃" {
-			lines = lines[:i-1]
+	//  ┃
+	//  ┃
+	//  ┃
+	//  ┃  Build  Anthropic Claude Sonnet 4
+	//  ╹▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀
+	//                                tab switch agent  ctrl+p commands
+	//
+	for i := len(lines) - 1; i >= 4; i-- {
+		if strings.HasPrefix(strings.TrimSpace(lines[i]), "╹▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀") {
+			lines = lines[:i-4]
 			break
 		}
 	}

lib/msgfmt/testdata/format/opencode/first_message/expected.txt

@@ -1,12 +1,10 @@
-                    █▀▀█ █▀▀█ █▀▀ █▀▀▄ █▀▀ █▀▀█ █▀▀▄ █▀▀
-                    █░░█ █░░█ █▀▀ █░░█ █░░ █░░█ █░░█ █▀▀
-                    ▀▀▀▀ █▀▀▀ ▀▀▀ ▀  ▀ ▀▀▀ ▀▀▀▀ ▀▀▀  ▀▀▀
-                                                  v0.6.8
+                                                                                                                                        ▄
+                                                                                                       █▀▀█ █▀▀█ █▀▀█ █▀▀▄ █▀▀▀ █▀▀█ █▀▀█ █▀▀█
+                                                                                                       █░░█ █░░█ █▀▀▀ █░░█ █░░░ █░░█ █░░█ █▀▀▀
+                                                                                                       ▀▀▀▀ █▀▀▀ ▀▀▀▀ ▀  ▀ ▀▀▀▀ ▀▀▀▀ ▀▀▀▀ ▀▀▀▀
+                                                                                                                                        1.0.98
 
-                     /new      new session     ctrl+x n
-                     /help     show help       ctrl+x h
-                     /share    share session   ctrl+x s
-                     /models   list models     ctrl+x m
-
-
-                    Grok Code is free for a limited time
+                                                                                                       Commands                         ctrl+p
+                                                                                                       List sessions                  ctrl+x l
+                                                                                                       Switch model                   ctrl+x m
+                                                                                                       Switch agent                        tab

lib/msgfmt/testdata/format/opencode/second_message/expected.txt

@@ -1,14 +1,15 @@
-  ┃
-  ┃  Shell Check git remote URLs to identify repository
-  ┃
-  ┃  $ git remote -v
-  ┃  origin    https://github.com/35C4n0r/agentapi (fetch)
-  ┃  origin    https://github.com/35C4n0r/agentapi (push)
-  ┃  upstream    https://github.com/coder/agentapi.git (fetch)
-  ┃  upstream    https://github.com/coder/agentapi.git (push)
-  ┃
-
-
-     This is the 35C4n0r/agentapi repository, which is a fork of
-     coder/agentapi.
-     Build claude-sonnet-4-20250514 (09:19 PM)
+     This is the agentapi repository. Based on the codebase structure and documentation, it's a Go HTTP API server that controls various coding agents (like Claude Code, Aider, Goose, etc.) through
+     terminal emulation.
+
+     The main purpose of this repository is to:
+
+     - Run coding agents in an in-memory terminal emulator
+     - Provide a unified HTTP API to interact with different agent types
+     - Parse terminal output into structured messages
+     - Include a Next.js web chat UI for interacting with agents
+     - Support multiple agent types with different message formats
+
+     The project supports agents like Claude Code, Aider, Goose, Codex, Gemini, and others, providing a standardized interface to communicate with them through HTTP endpoints and a web-based chat
+     interface.
+
+     Build claude-sonnet-4-20250514