Allow Open Terminal command when already in terminal mode

- Add KeyContext::Terminal to Open Terminal command contexts
- Remove redundant Close Terminal command (tabs handle this)

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Co-Authored-By: Claude Opus 4.5 <[email protected]>

Author: sinelaw

src/input/commands.rs

@@ -977,14 +977,6 @@ pub fn get_all_commands() -> Vec<Command> {
             name: "Open Terminal".to_string(),
             description: "Open a new terminal in the current split".to_string(),
             action: Action::OpenTerminal,
-            contexts: vec![KeyContext::Normal],
-            custom_contexts: vec![],
-            source: CommandSource::Builtin,
-        },
-        Command {
-            name: "Close Terminal".to_string(),
-            description: "Close the current terminal".to_string(),
-            action: Action::CloseTerminal,
             contexts: vec![KeyContext::Normal, KeyContext::Terminal],
             custom_contexts: vec![],
             source: CommandSource::Builtin,