feat: copy tweaks (#2502)

- For selectable options, use sentences starting in lowercase and not
ending with periods. To be honest I don't love this style, but better to
be consistent for now.
- Tweak some other strings.
- Put in more compelling suggestions on launch. Excited to put `/mcp` in
there next.

codex-rs/common/src/approval_presets.rs

@@ -24,21 +24,21 @@ pub fn builtin_approval_presets() -> Vec<ApprovalPreset> {
         ApprovalPreset {
             id: "read-only",
             label: "Read Only",
-            description: "Codex can read files and answer questions. Codex requires approval to make edits, run commands, or access network.",
+            description: "Codex can read files and answer questions. Codex requires approval to make edits, run commands, or access network",
             approval: AskForApproval::OnRequest,
             sandbox: SandboxPolicy::ReadOnly,
         },
         ApprovalPreset {
             id: "auto",
             label: "Auto",
-            description: "Codex can read files, make edits, and run commands in the workspace. Codex requires approval to work outside the workspace or access network.",
+            description: "Codex can read files, make edits, and run commands in the workspace. Codex requires approval to work outside the workspace or access network",
             approval: AskForApproval::OnRequest,
             sandbox: SandboxPolicy::new_workspace_write_policy(),
         },
         ApprovalPreset {
             id: "full-access",
             label: "Full Access",
-            description: "Codex can read files, make edits, and run commands with network access, without approval. Exercise caution.",
+            description: "Codex can read files, make edits, and run commands with network access, without approval. Exercise caution",
             approval: AskForApproval::Never,
             sandbox: SandboxPolicy::DangerFullAccess,
         },

codex-rs/common/src/model_presets.rs

@@ -24,28 +24,28 @@ pub fn builtin_model_presets() -> &'static [ModelPreset] {
         ModelPreset {
             id: "gpt-5-minimal",
             label: "gpt-5 minimal",
-            description: "— Fastest responses with very limited reasoning; ideal for coding, instructions, or lightweight tasks.",
+            description: "— fastest responses with limited reasoning; ideal for coding, instructions, or lightweight tasks",
             model: "gpt-5",
             effort: ReasoningEffort::Minimal,
         },
         ModelPreset {
             id: "gpt-5-low",
             label: "gpt-5 low",
-            description: "— Balances speed with some reasoning; useful for straightforward queries and short explanations.",
+            description: "— balances speed with some reasoning; useful for straightforward queries and short explanations",
             model: "gpt-5",
             effort: ReasoningEffort::Low,
         },
         ModelPreset {
             id: "gpt-5-medium",
             label: "gpt-5 medium",
-            description: "— Default setting; provides a solid balance of reasoning depth and latency for general-purpose tasks.",
+            description: "— default setting; provides a solid balance of reasoning depth and latency for general-purpose tasks",
             model: "gpt-5",
             effort: ReasoningEffort::Medium,
         },
         ModelPreset {
             id: "gpt-5-high",
             label: "gpt-5 high",
-            description: "— Maximizes reasoning depth for complex or ambiguous problems.",
+            description: "— maximizes reasoning depth for complex or ambiguous problems",
             model: "gpt-5",
             effort: ReasoningEffort::High,
         },

codex-rs/tui/src/chatwidget.rs

@@ -771,7 +771,7 @@ impl ChatWidget<'_> {
         }
 
         self.bottom_pane.show_selection_view(
-            "Select Approvals Mode".to_string(),
+            "Select Approval Mode".to_string(),
             None,
             Some("Press Enter to confirm or Esc to go back".to_string()),
             items,

codex-rs/tui/src/history_cell.rs

@@ -168,7 +168,8 @@ pub(crate) fn new_session_info(
             Line::from("".dim()),
             Line::from(format!(" /init - {}", SlashCommand::Init.description()).dim()),
             Line::from(format!(" /status - {}", SlashCommand::Status.description()).dim()),
-            Line::from(format!(" /diff - {}", SlashCommand::Diff.description()).dim()),
+            Line::from(format!(" /approvals - {}", SlashCommand::Approvals.description()).dim()),
+            Line::from(format!(" /model - {}", SlashCommand::Model.description()).dim()),
             Line::from("".dim()),
         ];
         PlainHistoryCell { lines }

codex-rs/tui/src/slash_command.rs

@@ -38,7 +38,7 @@ impl SlashCommand {
             SlashCommand::Diff => "show git diff (including untracked files)",
             SlashCommand::Mention => "mention a file",
             SlashCommand::Status => "show current session configuration and token usage",
-            SlashCommand::Model => "choose a model preset (model + reasoning effort)",
+            SlashCommand::Model => "choose what model and reasoning effort to use",
             SlashCommand::Approvals => "choose what Codex can do without approval",
             SlashCommand::Mcp => "list configured MCP tools",
             SlashCommand::Logout => "log out of Codex",