feat: memories menu (#17632)

Add menu that:
1. If memories feature is not enabled, propose to enable it
2. Let you choose if you want to generate memories and to use memories

codex-rs/tui/src/chatwidget.rs

@@ -251,6 +251,11 @@ const MULTI_AGENT_ENABLE_TITLE: &str = "Enable subagents?";
 const MULTI_AGENT_ENABLE_YES: &str = "Yes, enable";
 const MULTI_AGENT_ENABLE_NO: &str = "Not now";
 const MULTI_AGENT_ENABLE_NOTICE: &str = "Subagents will be enabled in the next session.";
+const MEMORIES_DOC_URL: &str = "https://developers.openai.com/codex/memories";
+const MEMORIES_ENABLE_TITLE: &str = "Enable memories?";
+const MEMORIES_ENABLE_YES: &str = "Yes, enable";
+const MEMORIES_ENABLE_NO: &str = "Not now";
+const MEMORIES_ENABLE_NOTICE: &str = "Memories will be enabled in the next session.";
 const PLAN_MODE_REASONING_SCOPE_TITLE: &str = "Apply reasoning change";
 const PLAN_MODE_REASONING_SCOPE_PLAN_ONLY: &str = "Apply to Plan mode override";
 const PLAN_MODE_REASONING_SCOPE_ALL_MODES: &str = "Apply to global default and Plan mode override";
@@ -311,6 +316,7 @@ use crate::bottom_pane::ExperimentalFeaturesView;
 use crate::bottom_pane::InputResult;
 use crate::bottom_pane::LocalImageAttachment;
 use crate::bottom_pane::McpServerElicitationFormRequest;
+use crate::bottom_pane::MemoriesSettingsView;
 use crate::bottom_pane::MentionBinding;
 use crate::bottom_pane::QUIT_SHORTCUT_TIMEOUT;
 use crate::bottom_pane::SelectionAction;
@@ -2588,6 +2594,61 @@ impl ChatWidget {
         });
     }
 
+    pub(crate) fn open_memories_popup(&mut self) {
+        if !self.config.features.enabled(Feature::MemoryTool) {
+            self.open_memories_enable_prompt();
+            return;
+        }
+
+        let view = MemoriesSettingsView::new(
+            self.config.memories.use_memories,
+            self.config.memories.generate_memories,
+            self.app_event_tx.clone(),
+        );
+        self.bottom_pane.show_view(Box::new(view));
+    }
+
+    pub(crate) fn open_memories_enable_prompt(&mut self) {
+        let items = vec![
+            SelectionItem {
+                name: MEMORIES_ENABLE_YES.to_string(),
+                description: Some(
+                    "Save the setting now. You will need a new session to use it.".to_string(),
+                ),
+                actions: vec![Box::new(|tx| {
+                    tx.send(AppEvent::UpdateFeatureFlags {
+                        updates: vec![(Feature::MemoryTool, true)],
+                    });
+                })],
+                dismiss_on_select: true,
+                ..Default::default()
+            },
+            SelectionItem {
+                name: MEMORIES_ENABLE_NO.to_string(),
+                description: Some("Keep memories disabled.".to_string()),
+                dismiss_on_select: true,
+                ..Default::default()
+            },
+        ];
+
+        self.bottom_pane.show_selection_view(SelectionViewParams {
+            title: Some(MEMORIES_ENABLE_TITLE.to_string()),
+            subtitle: Some("Memories are currently disabled in your config.".to_string()),
+            footer_note: Some(Line::from(vec![
+                "Learn more: ".dim(),
+                MEMORIES_DOC_URL.cyan().underlined(),
+            ])),
+            footer_hint: Some(standard_popup_hint_line()),
+            items,
+            ..Default::default()
+        });
+    }
+
+    pub(crate) fn set_memory_settings(&mut self, use_memories: bool, generate_memories: bool) {
+        self.config.memories.use_memories = use_memories;
+        self.config.memories.generate_memories = generate_memories;
+    }
+
     pub(crate) fn set_token_info(&mut self, info: Option<TokenUsageInfo>) {
         match info {
             Some(info) => self.apply_token_info(info),
@@ -9693,6 +9754,13 @@ impl ChatWidget {
         self.request_redraw();
     }
 
+    pub(crate) fn add_memories_enable_notice(&mut self) {
+        self.add_to_history(history_cell::new_warning_event(
+            MEMORIES_ENABLE_NOTICE.to_string(),
+        ));
+        self.request_redraw();
+    }
+
     pub(crate) fn add_plain_history_lines(&mut self, lines: Vec<Line<'static>>) {
         self.add_boxed_history(Box::new(PlainHistoryCell::new(lines)));
         self.request_redraw();
@@ -10372,6 +10440,7 @@ impl ChatWidget {
         self.config.features = config.features.clone();
         self.config.config_layer_stack = config.config_layer_stack.clone();
         self.config.realtime = config.realtime.clone();
+        self.config.memories = config.memories.clone();
     }
 
     pub(crate) fn open_review_popup(&mut self) {