feat: Add GPUI component library

Add core UI components for TaskWarrior GUI application:

Components:
- Input: Text input with autocomplete suggestions, keyboard navigation
- Button: Multiple variants (Primary, Secondary, Ghost, Danger, Success,
  Text)
- DropdownButton: Compound button with dropdown menu
- Icon: SVG icons with customizable sizes
- Label: Simple text display
- Panel: Container with optional title
- List: List container
- Modal: Modal dialog
- Divider: Visual separator

Infrastructure:
- Theme system with dark/light modes (Catppuccin colors)
- App module with window management

src/app.rs

@@ -0,0 +1,82 @@
+use gpui::prelude::*;
+use std::sync::Arc;
+
+use crate::components::{
+    self,
+    input::{Input, Suggestion},
+};
+
+pub(crate) struct App {
+    input: gpui::Entity<Input>,
+    current_text: gpui::SharedString,
+}
+
+impl gpui::Render for App {
+    fn render(
+        &mut self,
+        _window: &mut gpui::Window,
+        _cx: &mut gpui::Context<Self>,
+    ) -> impl gpui::IntoElement {
+        components::panel::Panel::new()
+            .child(self.input.clone())
+            .child(components::label::Label::new(format!(
+                "Text: {}",
+                &self.current_text
+            )))
+    }
+}
+
+impl App {
+    pub fn run() -> () {
+        let app = gpui::Application::new();
+
+        app.run(|app: &mut gpui::App| {
+            app.set_global(crate::theme::Theme::dark());
+            app.open_window(
+                gpui::WindowOptions::default(),
+                |_window: &mut gpui::Window, app: &mut gpui::App| {
+                    app.new(|cx: &mut gpui::Context<'_, App>| {
+                        let input = cx.new(|cx| {
+                            Input::new("input", cx, "Type here...").with_suggest(Arc::new(|text| {
+                                let suggestions = vec![
+                                    ("project:", "Filter by project"),
+                                    ("+work", "Tag: work"),
+                                    ("+personal", "Tag: personal"),
+                                    ("due:today", "Tasks for today"),
+                                    ("due:tomorrow", "Tasks for tomorrow"),
+                                    ("priority:H", "Priority high"),
+                                    ("priority:M", "Priority medium"),
+                                    ("priority:L", "Priority low"),
+                                ];
+
+                                suggestions
+                                    .into_iter()
+                                    .filter(|(insert, _)| {
+                                        text.is_empty()
+                                            || insert.to_lowercase().contains(&text.to_lowercase())
+                                    })
+                                    .map(|(insert, label)| {
+                                        Suggestion::new(format!("{} - {}", insert, label), insert)
+                                    })
+                                    .collect()
+                            }))
+                        });
+
+                        cx.observe(&input, |this, input, cx| {
+                            let value = input.read(cx).value().to_string();
+                            this.current_text = value.into();
+                            cx.notify();
+                        })
+                        .detach();
+
+                        App {
+                            input,
+                            current_text: "".into(),
+                        }
+                    })
+                },
+            )
+            .unwrap();
+        });
+    }
+}

src/components/button/dropdown.rs

@@ -0,0 +1,261 @@
+use std::sync::Arc;
+
+use gpui::prelude::*;
+
+use crate::components::button::Button;
+use crate::theme::ActiveTheme;
+
+#[derive(Clone, Debug)]
+pub struct DropdownItem {
+    pub label: gpui::SharedString,
+}
+
+impl DropdownItem {
+    pub fn new(label: impl Into<gpui::SharedString>) -> Self {
+        Self {
+            label: label.into(),
+        }
+    }
+}
+
+pub struct Dropdown {
+    id: gpui::ElementId,
+    button: Option<Button>,
+    items: Vec<DropdownItem>,
+    open: bool,
+    selected_index: Option<usize>,
+    disabled: bool,
+    loading: bool,
+    placeholder: gpui::SharedString,
+    on_select: Option<Arc<dyn Fn(usize, &DropdownItem, &mut gpui::Context<Self>) + Send + Sync>>,
+}
+
+impl Dropdown {
+    pub fn new(id: impl Into<gpui::ElementId>) -> Self {
+        Self {
+            id: id.into(),
+            button: None,
+            items: Vec::new(),
+            open: false,
+            selected_index: None,
+            disabled: false,
+            loading: false,
+            placeholder: "Seleccionar".into(),
+            on_select: None,
+        }
+    }
+
+    pub fn button(mut self, button: Button) -> Self {
+        self.button = Some(button);
+        self
+    }
+
+    pub fn item(mut self, item: DropdownItem) -> Self {
+        self.items.push(item);
+        self
+    }
+
+    pub fn items<I>(mut self, items: I) -> Self
+    where
+        I: IntoIterator<Item = DropdownItem>,
+    {
+        self.items = items.into_iter().collect();
+        self
+    }
+
+    pub fn placeholder(mut self, placeholder: impl Into<gpui::SharedString>) -> Self {
+        self.placeholder = placeholder.into();
+        self
+    }
+
+    pub fn selected_index(mut self, index: usize) -> Self {
+        self.selected_index = Some(index);
+        self
+    }
+
+    pub fn selected_index_value(&self) -> Option<usize> {
+        self.selected_index
+    }
+
+    pub fn selected_item(&self) -> Option<&DropdownItem> {
+        self.selected_index.and_then(|index| self.items.get(index))
+    }
+
+    pub fn is_open(&self) -> bool {
+        self.open
+    }
+
+    pub fn disabled(mut self, disabled: bool) -> Self {
+        self.disabled = disabled;
+        self
+    }
+
+    pub fn loading(mut self, loading: bool) -> Self {
+        self.loading = loading;
+        self
+    }
+
+    pub fn on_select(
+        mut self,
+        handler: Arc<dyn Fn(usize, &DropdownItem, &mut gpui::Context<Self>) + Send + Sync>,
+    ) -> Self {
+        self.on_select = Some(handler);
+        self
+    }
+
+    pub fn selected_label(&self) -> Option<gpui::SharedString> {
+        self.selected_index
+            .and_then(|index| self.items.get(index).map(|item| item.label.clone()))
+    }
+
+    fn toggle_open(&mut self, cx: &mut gpui::Context<Self>) {
+        if self.disabled || self.loading || self.items.is_empty() {
+            return;
+        }
+        self.open = !self.open;
+        cx.notify();
+    }
+
+    fn select_item(&mut self, index: usize, cx: &mut gpui::Context<Self>) {
+        if self.disabled || self.loading {
+            return;
+        }
+        let item = match self.items.get(index) {
+            Some(item) => item,
+            None => return,
+        };
+        self.selected_index = Some(index);
+        self.open = false;
+        if let Some(on_select) = self.on_select.clone() {
+            on_select(index, item, cx);
+        }
+        cx.notify();
+    }
+
+    fn handle_trigger_mouse_down(
+        &mut self,
+        _event: &gpui::MouseDownEvent,
+        _window: &mut gpui::Window,
+        cx: &mut gpui::Context<Self>,
+    ) {
+        self.toggle_open(cx);
+    }
+
+    fn handle_mouse_down_out(
+        &mut self,
+        _event: &gpui::MouseDownEvent,
+        _window: &mut gpui::Window,
+        cx: &mut gpui::Context<Self>,
+    ) {
+        if self.open {
+            self.open = false;
+            cx.notify();
+        }
+    }
+
+    fn render_menu(&self, cx: &gpui::Context<Self>) -> gpui::AnyElement {
+        if !self.open || self.items.is_empty() {
+            return gpui::div().into_any_element();
+        }
+
+        let theme = cx.theme();
+        let is_disabled = self.disabled || self.loading;
+        let items: Vec<gpui::AnyElement> = self
+            .items
+            .iter()
+            .enumerate()
+            .map(|(index, item)| {
+                let is_selected = self.selected_index == Some(index);
+                let mut row = gpui::div()
+                    .id(index)
+                    .px_2()
+                    .py_1()
+                    .text_color(if is_selected {
+                        theme.selection_foreground
+                    } else {
+                        theme.foreground
+                    })
+                    .when(is_selected, |el| el.bg(theme.selection))
+                    .hover(|s: gpui::StyleRefinement| s.bg(theme.selection))
+                    .child(item.label.clone());
+
+                if is_disabled {
+                    row = row.text_color(theme.muted).cursor_not_allowed();
+                } else {
+                    row = row.cursor_pointer().on_mouse_down(
+                        gpui::MouseButton::Left,
+                        cx.listener(move |this, _event, _window, cx| {
+                            this.select_item(index, cx);
+                        }),
+                    );
+                }
+
+                row.into_any_element()
+            })
+            .collect();
+
+        gpui::div()
+            .absolute()
+            .top_full()
+            .left_0()
+            .right_0()
+            .mt_1()
+            .border_1()
+            .border_color(theme.border)
+            .bg(theme.panel)
+            .rounded_md()
+            .overflow_hidden()
+            .children(items)
+            .into_any_element()
+    }
+}
+
+impl gpui::Render for Dropdown {
+    fn render(
+        &mut self,
+        _window: &mut gpui::Window,
+        cx: &mut gpui::Context<Self>,
+    ) -> impl IntoElement {
+        let is_disabled = self.disabled || self.loading;
+        let label = self
+            .selected_label()
+            .unwrap_or_else(|| self.placeholder.clone());
+
+        let mut trigger = if let Some(button) = self.button.clone() {
+            let mut button = button;
+            button.on_click = None;
+            button.label = Some(label.clone());
+            button.disabled(is_disabled).loading(self.loading)
+        } else {
+            Button::label(self.id.clone(), label)
+                .disabled(is_disabled)
+                .loading(self.loading)
+        };
+
+        if is_disabled || self.items.is_empty() {
+            trigger = trigger.disabled(true);
+        }
+
+        let mut trigger_wrap = gpui::div().child(trigger);
+        if !is_disabled && !self.items.is_empty() {
+            trigger_wrap = trigger_wrap.on_mouse_down(
+                gpui::MouseButton::Left,
+                cx.listener(Self::handle_trigger_mouse_down),
+            );
+        }
+
+        let mut container = gpui::div()
+            .id(self.id.clone())
+            .relative()
+            .flex()
+            .flex_col()
+            .child(trigger_wrap)
+            .child(self.render_menu(cx));
+
+        if self.open {
+            container = container.on_mouse_down_out(cx.listener(Self::handle_mouse_down_out));
+        }
+
+        container
+    }
+}

src/components/button/mod.rs

@@ -0,0 +1,287 @@
+pub mod dropdown;
+pub use dropdown::{Dropdown, DropdownItem};
+
+use gpui::{
+    App, ClickEvent, ElementId, Pixels, SharedString, StyleRefinement, Window, div, prelude::*, px,
+};
+use std::sync::Arc;
+
+use crate::components::icon::{Icon, IconSize};
+use crate::theme::ActiveTheme;
+
+fn darken(color: gpui::Rgba, amount: f32) -> gpui::Rgba {
+    gpui::Rgba {
+        r: (color.r * (1.0 - amount)).max(0.0),
+        g: (color.g * (1.0 - amount)).max(0.0),
+        b: (color.b * (1.0 - amount)).max(0.0),
+        a: color.a,
+    }
+}
+
+#[derive(Debug, Clone, Copy, Default)]
+pub enum ButtonSize {
+    Small,
+    #[default]
+    Medium,
+    Large,
+}
+
+impl ButtonSize {
+    fn height(self) -> Pixels {
+        match self {
+            ButtonSize::Small => px(28.),
+            ButtonSize::Medium => px(36.),
+            ButtonSize::Large => px(44.),
+        }
+    }
+
+    fn px(self) -> Pixels {
+        match self {
+            ButtonSize::Small => px(8.),
+            ButtonSize::Medium => px(12.),
+            ButtonSize::Large => px(16.),
+        }
+    }
+
+    fn icon_size(self) -> IconSize {
+        match self {
+            ButtonSize::Small => IconSize::Small,
+            ButtonSize::Medium => IconSize::Medium,
+            ButtonSize::Large => IconSize::Large,
+        }
+    }
+}
+
+#[derive(Debug, Clone, Copy, Default, PartialEq, Eq)]
+pub enum ButtonVariant {
+    Primary,
+    #[default]
+    Secondary,
+    Ghost,
+    Danger,
+    Success,
+    Text,
+}
+
+pub trait ButtonVariants: Sized {
+    fn with_variant(self, variant: ButtonVariant) -> Self;
+
+    fn primary(self) -> Self {
+        self.with_variant(ButtonVariant::Primary)
+    }
+
+    fn secondary(self) -> Self {
+        self.with_variant(ButtonVariant::Secondary)
+    }
+
+    fn ghost(self) -> Self {
+        self.with_variant(ButtonVariant::Ghost)
+    }
+
+    fn danger(self) -> Self {
+        self.with_variant(ButtonVariant::Danger)
+    }
+
+    fn success(self) -> Self {
+        self.with_variant(ButtonVariant::Success)
+    }
+
+    fn text(self) -> Self {
+        self.with_variant(ButtonVariant::Text)
+    }
+}
+
+#[derive(Clone, IntoElement)]
+pub struct Button {
+    id: ElementId,
+    label: Option<SharedString>,
+    icon: Option<Icon>,
+    variant: ButtonVariant,
+    size: ButtonSize,
+    disabled: bool,
+    loading: bool,
+    style: StyleRefinement,
+    on_click: Option<Arc<dyn Fn(&ClickEvent, &mut Window, &mut App) + 'static>>,
+}
+
+impl Button {
+    pub fn new(id: impl Into<ElementId>) -> Self {
+        Self {
+            id: id.into(),
+            label: None,
+            icon: None,
+            variant: ButtonVariant::default(),
+            size: ButtonSize::default(),
+            disabled: false,
+            loading: false,
+            style: StyleRefinement::default(),
+            on_click: None,
+        }
+    }
+
+    pub fn label(id: impl Into<ElementId>, label: impl Into<SharedString>) -> Self {
+        Self::new(id).with_label(label)
+    }
+
+    pub fn icon(id: impl Into<ElementId>, icon: impl Into<Icon>) -> Self {
+        Self::new(id).with_icon(icon)
+    }
+
+    pub fn with_label(mut self, label: impl Into<SharedString>) -> Self {
+        self.label = Some(label.into());
+        self
+    }
+
+    pub fn with_icon(mut self, icon: impl Into<Icon>) -> Self {
+        self.icon = Some(icon.into());
+        self
+    }
+
+    pub fn with_size(mut self, size: ButtonSize) -> Self {
+        self.size = size;
+        self
+    }
+
+    pub fn small(self) -> Self {
+        self.with_size(ButtonSize::Small)
+    }
+
+    pub fn medium(self) -> Self {
+        self.with_size(ButtonSize::Medium)
+    }
+
+    pub fn large(self) -> Self {
+        self.with_size(ButtonSize::Large)
+    }
+
+    pub fn disabled(mut self, disabled: bool) -> Self {
+        self.disabled = disabled;
+        self
+    }
+
+    pub fn loading(mut self, loading: bool) -> Self {
+        self.loading = loading;
+        self
+    }
+
+    pub fn on_click(
+        mut self,
+        handler: impl Fn(&ClickEvent, &mut Window, &mut App) + 'static,
+    ) -> Self {
+        self.on_click = Some(Arc::new(handler));
+        self
+    }
+}
+
+impl ButtonVariants for Button {
+    fn with_variant(mut self, variant: ButtonVariant) -> Self {
+        self.variant = variant;
+        self
+    }
+}
+
+impl Styled for Button {
+    fn style(&mut self) -> &mut StyleRefinement {
+        &mut self.style
+    }
+}
+
+impl RenderOnce for Button {
+    fn render(self, _window: &mut Window, cx: &mut App) -> impl IntoElement {
+        let theme = cx.theme();
+        let is_icon_only = self.label.is_none();
+
+        let transparent = gpui::rgba(0x00000000);
+
+        let (bg, fg, border, hover_bg) = match self.variant {
+            ButtonVariant::Primary => (
+                theme.accent,
+                theme.background,
+                theme.accent,
+                darken(theme.accent, 0.1),
+            ),
+            ButtonVariant::Secondary => {
+                (theme.panel, theme.foreground, theme.border, theme.selection)
+            }
+            ButtonVariant::Ghost => (transparent, theme.foreground, transparent, theme.selection),
+            ButtonVariant::Danger => (
+                theme.error,
+                theme.background,
+                theme.error,
+                darken(theme.error, 0.1),
+            ),
+            ButtonVariant::Success => (
+                theme.success,
+                theme.background,
+                theme.success,
+                darken(theme.success, 0.1),
+            ),
+            ButtonVariant::Text => (transparent, theme.foreground, transparent, transparent),
+        };
+
+        let (bg, fg, border) = if self.disabled {
+            (transparent, theme.muted, theme.border)
+        } else {
+            (bg, fg, border)
+        };
+
+        let height = self.size.height();
+        let px = self.size.px();
+        let icon_size = self.size.icon_size();
+
+        let mut base = div()
+            .id(self.id)
+            .flex()
+            .items_center()
+            .justify_center()
+            .gap_2()
+            .h(height)
+            .border_1()
+            .rounded_md()
+            .cursor_pointer()
+            .bg(bg)
+            .border_color(border)
+            .text_color(fg);
+
+        base = if is_icon_only {
+            base.px(px)
+        } else {
+            base.px(px * 1.5)
+        };
+
+        if !self.disabled && self.variant != ButtonVariant::Text {
+            base = base
+                .hover(|s: gpui::StyleRefinement| s.bg(hover_bg))
+                .active(|s: gpui::StyleRefinement| s.opacity(0.8));
+        }
+
+        if self.disabled {
+            base = base.cursor_not_allowed();
+        }
+
+        if let Some(icon) = self.icon {
+            base = base.child(icon.size(icon_size));
+        }
+
+        if let Some(label) = self.label {
+            base = base.child(label);
+        }
+
+        if self.loading {
+            base = base.opacity(0.7);
+        }
+
+        if let Some(on_click) = self.on_click {
+            let disabled = self.disabled || self.loading;
+            base = base.on_click(move |event, window, cx| {
+                if !disabled {
+                    on_click(event, window, cx);
+                }
+            });
+        }
+
+        *base.style() = self.style;
+
+        base
+    }
+}

src/components/divider.rs

@@ -0,0 +1,46 @@
+use gpui::Styled as _;
+
+use crate::theme::{ActiveTheme, Color};
+
+pub enum DividerDirection {
+    Horizontal,
+    Vertical,
+}
+
+#[derive(gpui::IntoElement)]
+pub struct Divider {
+    color: Color,
+    direction: DividerDirection,
+}
+
+impl Divider {
+    pub fn new(color: Color, direction: DividerDirection) -> Self {
+        Self { color, direction }
+    }
+
+    pub fn build(cx: &mut gpui::Context<Self>) -> Self {
+        Self {
+            color: cx.theme().border,
+            direction: DividerDirection::Horizontal,
+        }
+    }
+
+    pub fn color(mut self, color: Color) -> Self {
+        self.color = color;
+        self
+    }
+
+    pub fn direction(mut self, direction: DividerDirection) -> Self {
+        self.direction = direction;
+        self
+    }
+}
+
+impl gpui::RenderOnce for Divider {
+    fn render(self, _window: &mut gpui::Window, _cx: &mut gpui::App) -> impl gpui::IntoElement {
+        match self.direction {
+            DividerDirection::Horizontal => gpui::div().h(gpui::px(1.0)).w_full().bg(self.color),
+            DividerDirection::Vertical => gpui::div().w(gpui::px(1.0)).h_full().bg(self.color),
+        }
+    }
+}

src/components/icon.rs

@@ -0,0 +1,162 @@
+use gpui::{Pixels, SharedString, StyleRefinement, Styled, prelude::*, px, rems};
+
+#[derive(Debug, Clone, Copy, Default)]
+pub enum IconSize {
+    XSmall, // 12px
+    Small,  // 14px
+    #[default]
+    Medium, // 16px
+    Large,  // 20px
+    XLarge, // 24px
+    Custom(Pixels),
+}
+
+impl IconSize {
+    pub fn px(self) -> Pixels {
+        match self {
+            IconSize::XSmall => px(12.),
+            IconSize::Small => px(14.),
+            IconSize::Medium => px(16.),
+            IconSize::Large => px(20.),
+            IconSize::XLarge => px(24.),
+            IconSize::Custom(size) => size,
+        }
+    }
+
+    pub fn rems(self) -> gpui::Rems {
+        match self {
+            IconSize::XSmall => rems(0.75),
+            IconSize::Small => rems(0.875),
+            IconSize::Medium => rems(1.),
+            IconSize::Large => rems(1.25),
+            IconSize::XLarge => rems(1.5),
+            IconSize::Custom(size) => rems(f32::from(size) / 16.),
+        }
+    }
+}
+
+impl From<Pixels> for IconSize {
+    fn from(px: Pixels) -> Self {
+        IconSize::Custom(px)
+    }
+}
+
+impl From<f32> for IconSize {
+    fn from(px: f32) -> Self {
+        IconSize::Custom(gpui::px(px))
+    }
+}
+
+pub trait IconNamed {
+    fn path(&self) -> SharedString;
+}
+
+#[derive(Debug, Clone, Copy)]
+pub enum IconName {}
+
+impl IconNamed for IconName {
+    fn path(&self) -> SharedString {
+        match self {
+            // Mapear cada variante a su path SVG
+            // IconName::Check => "icons/check.svg".into(),
+            // IconName::Close => "icons/close.svg".into(),
+            _ => "".into(),
+        }
+    }
+}
+
+impl<T: IconNamed> From<T> for Icon {
+    fn from(name: T) -> Self {
+        Self::new(name)
+    }
+}
+
+#[derive(Clone, IntoElement)]
+pub struct Icon {
+    path: SharedString,
+    size: IconSize,
+    color: Option<gpui::Hsla>,
+    style: StyleRefinement,
+}
+
+impl Default for Icon {
+    fn default() -> Self {
+        Self {
+            path: SharedString::default(),
+            size: IconSize::default(),
+            color: None,
+            style: StyleRefinement::default(),
+        }
+    }
+}
+
+impl Icon {
+    pub fn new(name: impl IconNamed) -> Self {
+        Self::default().path(name.path())
+    }
+
+    pub fn from_path(path: impl Into<SharedString>) -> Self {
+        Self::default().path(path)
+    }
+
+    pub fn path(mut self, path: impl Into<SharedString>) -> Self {
+        self.path = path.into();
+        self
+    }
+
+    pub fn size(mut self, size: impl Into<IconSize>) -> Self {
+        self.size = size.into();
+        self
+    }
+
+    pub fn xsmall(self) -> Self {
+        self.size(IconSize::XSmall)
+    }
+
+    pub fn small(self) -> Self {
+        self.size(IconSize::Small)
+    }
+
+    pub fn medium(self) -> Self {
+        self.size(IconSize::Medium)
+    }
+
+    pub fn large(self) -> Self {
+        self.size(IconSize::Large)
+    }
+
+    pub fn xlarge(self) -> Self {
+        self.size(IconSize::XLarge)
+    }
+
+    pub fn color(mut self, color: impl Into<gpui::Hsla>) -> Self {
+        self.color = Some(color.into());
+        self
+    }
+
+    pub fn with_style(mut self, style: StyleRefinement) -> Self {
+        self.style = style;
+        self
+    }
+}
+
+impl Styled for Icon {
+    fn style(&mut self) -> &mut StyleRefinement {
+        &mut self.style
+    }
+}
+
+impl RenderOnce for Icon {
+    fn render(mut self, window: &mut gpui::Window, _cx: &mut gpui::App) -> impl IntoElement {
+        let size = self.size.rems();
+        let color = self.color.unwrap_or_else(|| window.text_style().color);
+        self.style.size.width = Some(size.into());
+        self.style.size.height = Some(size.into());
+
+        let mut svg = gpui::svg().path(self.path).flex_none().text_color(color);
+
+        *svg.style() = self.style;
+
+        svg
+    }
+}

src/components/input/mod.rs

@@ -0,0 +1,567 @@
+mod suggestion;
+
+use crate::theme::ActiveTheme;
+use gpui::prelude::*;
+use std::sync::Arc;
+
+pub use suggestion::Suggestion;
+
+pub struct Input {
+    id: gpui::ElementId,
+    focus: gpui::FocusHandle,
+    value: String,
+    placeholder: gpui::SharedString,
+
+    cursor_pos: usize,
+
+    suggestions: Vec<Suggestion>,
+    suggestions_open: bool,
+    active_suggestion: usize,
+
+    suggest: Option<Arc<dyn Fn(&str) -> Vec<Suggestion> + Send + Sync>>,
+    on_change: Option<Arc<dyn Fn(&str, &mut gpui::Context<Self>) + Send + Sync>>,
+    on_submit: Option<Arc<dyn Fn(&str, &mut gpui::Context<Self>) + Send + Sync>>,
+}
+
+impl Input {
+    pub fn new(
+        id: impl Into<gpui::ElementId>,
+        cx: &mut gpui::Context<Self>,
+        placeholder: impl Into<gpui::SharedString>,
+    ) -> Self {
+        Self {
+            id: id.into(),
+            focus: cx.focus_handle(),
+            value: String::new(),
+            placeholder: placeholder.into(),
+
+            cursor_pos: 0,
+
+            suggestions: vec![],
+            suggestions_open: false,
+            active_suggestion: 0,
+
+            suggest: None,
+            on_change: None,
+            on_submit: None,
+        }
+    }
+
+    pub fn with_suggest(mut self, f: Arc<dyn Fn(&str) -> Vec<Suggestion> + Send + Sync>) -> Self {
+        self.suggest = Some(f);
+        self
+    }
+
+    pub fn with_on_change(
+        mut self,
+        f: Arc<dyn Fn(&str, &mut gpui::Context<Self>) + Send + Sync>,
+    ) -> Self {
+        self.on_change = Some(f);
+        self
+    }
+
+    pub fn with_on_submit(
+        mut self,
+        f: Arc<dyn Fn(&str, &mut gpui::Context<Self>) + Send + Sync>,
+    ) -> Self {
+        self.on_submit = Some(f);
+        self
+    }
+
+    pub fn value(&self) -> &str {
+        &self.value
+    }
+
+    pub fn set_value(&mut self, value: impl Into<String>, cx: &mut gpui::Context<Self>) {
+        self.value = value.into();
+        self.cursor_pos = self.value.len();
+        self.refresh_suggestions(cx);
+        cx.notify();
+    }
+
+    pub fn clear(&mut self, cx: &mut gpui::Context<Self>) {
+        self.set_value("", cx);
+    }
+
+    pub fn focus(&self, window: &mut gpui::Window, cx: &mut gpui::Context<Self>) {
+        window.focus(&self.focus);
+        cx.notify();
+    }
+
+    fn word_start_before(&self, pos: usize) -> usize {
+        if pos == 0 {
+            return 0;
+        }
+        let bytes = self.value.as_bytes();
+        let mut i = pos;
+
+        while i > 0 && bytes[i - 1].is_ascii_whitespace() {
+            i -= 1;
+        }
+
+        while i > 0 && !bytes[i - 1].is_ascii_whitespace() {
+            i -= 1;
+        }
+
+        i
+    }
+
+    fn word_end_after(&self, pos: usize) -> usize {
+        let len = self.value.len();
+        if pos >= len {
+            return len;
+        }
+        let bytes = self.value.as_bytes();
+        let mut i = pos;
+
+        while i < len && !bytes[i].is_ascii_whitespace() {
+            i += 1;
+        }
+
+        while i < len && bytes[i].is_ascii_whitespace() {
+            i += 1;
+        }
+
+        i
+    }
+
+    fn move_left(&mut self) {
+        if self.cursor_pos > 0 {
+            let mut new_pos = self.cursor_pos - 1;
+            while new_pos > 0 && !self.value.is_char_boundary(new_pos) {
+                new_pos -= 1;
+            }
+            self.cursor_pos = new_pos;
+        }
+    }
+
+    fn move_right(&mut self) {
+        if self.cursor_pos < self.value.len() {
+            let mut new_pos = self.cursor_pos + 1;
+            while new_pos < self.value.len() && !self.value.is_char_boundary(new_pos) {
+                new_pos += 1;
+            }
+            self.cursor_pos = new_pos;
+        }
+    }
+
+    fn refresh_suggestions(&mut self, cx: &mut gpui::Context<Self>) {
+        if let Some(suggest) = &self.suggest {
+            self.suggestions = suggest(&self.value);
+            self.active_suggestion = 0;
+            self.suggestions_open = !self.suggestions.is_empty() && !self.value.is_empty();
+            cx.notify();
+        }
+    }
+
+    fn open_suggestions(&mut self, cx: &mut gpui::Context<Self>) {
+        if let Some(suggest) = &self.suggest {
+            self.suggestions = suggest(&self.value);
+            self.active_suggestion = 0;
+            self.suggestions_open = !self.suggestions.is_empty();
+            cx.notify();
+        }
+    }
+
+    fn accept_suggestion(&mut self, cx: &mut gpui::Context<Self>) {
+        if !self.suggestions_open {
+            return;
+        }
+        if let Some(s) = self.suggestions.get(self.active_suggestion).cloned() {
+            self.value = s.insert.to_string();
+            self.cursor_pos = self.value.len();
+            self.suggestions_open = false;
+
+            if let Some(on_change) = self.on_change.clone() {
+                on_change(&self.value, cx);
+            }
+            cx.notify();
+        }
+    }
+
+    fn click_suggestion(&mut self, index: usize, cx: &mut gpui::Context<Self>) {
+        if !self.suggestions_open {
+            return;
+        }
+        if index >= self.suggestions.len() {
+            return;
+        }
+        self.active_suggestion = index;
+        self.accept_suggestion(cx);
+    }
+
+    fn submit(&mut self, cx: &mut gpui::Context<Self>) {
+        self.suggestions_open = false;
+        if let Some(on_submit) = self.on_submit.clone() {
+            on_submit(&self.value, cx);
+        }
+        cx.notify();
+    }
+
+    fn move_suggestion(&mut self, delta: isize, cx: &mut gpui::Context<Self>) {
+        if !self.suggestions_open || self.suggestions.is_empty() {
+            return;
+        }
+        let len = self.suggestions.len() as isize;
+        let mut next = self.active_suggestion as isize + delta;
+        if next < 0 {
+            next = len - 1;
+        }
+        if next >= len {
+            next = 0;
+        }
+        self.active_suggestion = next as usize;
+        cx.notify();
+    }
+
+    fn insert_text(&mut self, text: &str, cx: &mut gpui::Context<Self>) {
+        self.value.insert_str(self.cursor_pos, text);
+        self.cursor_pos += text.len();
+
+        if let Some(on_change) = self.on_change.clone() {
+            on_change(&self.value, cx);
+        }
+        self.refresh_suggestions(cx);
+        cx.notify();
+    }
+
+    fn delete_backward(&mut self, cx: &mut gpui::Context<Self>) {
+        if self.cursor_pos == 0 {
+            return;
+        }
+
+        let old_pos = self.cursor_pos;
+        self.move_left();
+        self.value.drain(self.cursor_pos..old_pos);
+
+        if let Some(on_change) = self.on_change.clone() {
+            on_change(&self.value, cx);
+        }
+        self.refresh_suggestions(cx);
+        cx.notify();
+    }
+
+    fn delete_forward(&mut self, cx: &mut gpui::Context<Self>) {
+        if self.cursor_pos >= self.value.len() {
+            return;
+        }
+
+        let mut end = self.cursor_pos + 1;
+        while end < self.value.len() && !self.value.is_char_boundary(end) {
+            end += 1;
+        }
+        self.value.drain(self.cursor_pos..end);
+
+        if let Some(on_change) = self.on_change.clone() {
+            on_change(&self.value, cx);
+        }
+        self.refresh_suggestions(cx);
+        cx.notify();
+    }
+
+    fn delete_word_backward(&mut self, cx: &mut gpui::Context<Self>) {
+        if self.cursor_pos == 0 {
+            return;
+        }
+
+        let word_start = self.word_start_before(self.cursor_pos);
+        self.value.drain(word_start..self.cursor_pos);
+        self.cursor_pos = word_start;
+
+        if let Some(on_change) = self.on_change.clone() {
+            on_change(&self.value, cx);
+        }
+        self.refresh_suggestions(cx);
+        cx.notify();
+    }
+
+    fn delete_word_forward(&mut self, cx: &mut gpui::Context<Self>) {
+        if self.cursor_pos >= self.value.len() {
+            return;
+        }
+
+        let word_end = self.word_end_after(self.cursor_pos);
+        self.value.drain(self.cursor_pos..word_end);
+
+        if let Some(on_change) = self.on_change.clone() {
+            on_change(&self.value, cx);
+        }
+        self.refresh_suggestions(cx);
+        cx.notify();
+    }
+
+    fn handle_key_down(
+        &mut self,
+        event: &gpui::KeyDownEvent,
+        _window: &mut gpui::Window,
+        cx: &mut gpui::Context<Self>,
+    ) {
+        let key = event.keystroke.key.as_str();
+        let ctrl = event.keystroke.modifiers.control;
+        let shift = event.keystroke.modifiers.shift;
+
+        match key {
+            "enter" => {
+                if self.suggestions_open {
+                    self.accept_suggestion(cx);
+                } else {
+                    self.submit(cx);
+                }
+            }
+
+            "escape" => {
+                self.suggestions_open = false;
+                cx.notify();
+            }
+
+            "tab" => {
+                if shift {
+                    if self.suggestions_open {
+                        self.move_suggestion(-1, cx);
+                    }
+                } else {
+                    if self.suggestions_open {
+                        self.move_suggestion(1, cx);
+                    } else {
+                        self.open_suggestions(cx);
+                    }
+                }
+            }
+
+            "up" => self.move_suggestion(-1, cx),
+            "down" => self.move_suggestion(1, cx),
+
+            "left" => {
+                if ctrl {
+                    self.cursor_pos = self.word_start_before(self.cursor_pos);
+                    cx.notify();
+                } else {
+                    self.move_left();
+                    cx.notify();
+                }
+            }
+
+            "right" => {
+                if ctrl {
+                    self.cursor_pos = self.word_end_after(self.cursor_pos);
+                    cx.notify();
+                } else {
+                    self.move_right();
+                    cx.notify();
+                }
+            }
+
+            "home" => {
+                self.cursor_pos = 0;
+                cx.notify();
+            }
+
+            "end" => {
+                self.cursor_pos = self.value.len();
+                cx.notify();
+            }
+
+            "backspace" => {
+                if ctrl {
+                    self.delete_word_backward(cx);
+                } else {
+                    self.delete_backward(cx);
+                }
+            }
+
+            "delete" => {
+                if ctrl {
+                    self.delete_word_forward(cx);
+                } else {
+                    self.delete_forward(cx);
+                }
+            }
+
+            "w" if ctrl => {
+                self.delete_word_backward(cx);
+            }
+
+            "a" if ctrl => {
+                self.cursor_pos = 0;
+                cx.notify();
+            }
+
+            "e" if ctrl => {
+                self.cursor_pos = self.value.len();
+                cx.notify();
+            }
+
+            "u" if ctrl => {
+                self.value.drain(0..self.cursor_pos);
+                self.cursor_pos = 0;
+                if let Some(on_change) = self.on_change.clone() {
+                    on_change(&self.value, cx);
+                }
+                self.refresh_suggestions(cx);
+                cx.notify();
+            }
+
+            "k" if ctrl => {
+                self.value.truncate(self.cursor_pos);
+                if let Some(on_change) = self.on_change.clone() {
+                    on_change(&self.value, cx);
+                }
+                self.refresh_suggestions(cx);
+                cx.notify();
+            }
+
+            _ => {
+                if let Some(ch) = event.keystroke.key_char.as_ref() {
+                    if !ctrl && ch != "\n" && ch != "\r" && ch != "\t" {
+                        self.insert_text(ch, cx);
+                    }
+                }
+            }
+        }
+    }
+
+    fn render_suggestions(&self, cx: &gpui::Context<Self>) -> impl IntoElement {
+        if !self.suggestions_open {
+            return gpui::div().into_any_element();
+        }
+
+        let theme = cx.theme();
+        let items: Vec<gpui::AnyElement> = self
+            .suggestions
+            .iter()
+            .enumerate()
+            .map(|(i, s)| {
+                let is_active = i == self.active_suggestion;
+                gpui::div()
+                    .on_mouse_down(
+                        gpui::MouseButton::Left,
+                        cx.listener(move |this, _e, _w, cx| {
+                            this.click_suggestion(i, cx);
+                        }),
+                    )
+                    .cursor_pointer()
+                    .px_2()
+                    .py_1()
+                    .when(is_active, |el| el.bg(theme.selection))
+                    .text_color(if is_active {
+                        theme.selection_foreground
+                    } else {
+                        theme.foreground
+                    })
+                    .child(s.label.clone())
+                    .into_any_element()
+            })
+            .collect();
+
+        gpui::div()
+            .absolute()
+            .top_full()
+            .left_0()
+            .right_0()
+            .mt_1()
+            .border_1()
+            .border_color(theme.border)
+            .bg(theme.panel)
+            .rounded_md()
+            .overflow_hidden()
+            .children(items)
+            .into_any_element()
+    }
+}
+
+impl gpui::Render for Input {
+    fn render(
+        &mut self,
+        window: &mut gpui::Window,
+        cx: &mut gpui::Context<Self>,
+    ) -> impl IntoElement {
+        let theme = cx.theme();
+        let is_focused = self.focus.is_focused(window);
+
+        let show_placeholder = self.value.is_empty();
+
+        let content = if show_placeholder {
+            let cursor = if is_focused {
+                gpui::div().w_px().h_4().bg(theme.accent).into_any_element()
+            } else {
+                gpui::div().into_any_element()
+            };
+
+            gpui::div()
+                .id(self.id.clone())
+                .flex()
+                .flex_row()
+                .items_center()
+                .child(cursor)
+                .child(
+                    gpui::div()
+                        .text_color(theme.muted)
+                        .child(self.placeholder.clone()),
+                )
+                .into_any_element()
+        } else {
+            let before = &self.value[..self.cursor_pos];
+            let after = &self.value[self.cursor_pos..];
+
+            let cursor = if is_focused {
+                gpui::div()
+                    .id(self.id.clone())
+                    .w_px()
+                    .h_4()
+                    .bg(theme.accent)
+                    .into_any_element()
+            } else {
+                gpui::div().id(self.id.clone()).into_any_element()
+            };
+
+            gpui::div()
+                .id(self.id.clone())
+                .flex()
+                .flex_row()
+                .items_center()
+                .child(
+                    gpui::div()
+                        .text_color(theme.foreground)
+                        .child(before.to_string()),
+                )
+                .child(cursor)
+                .child(
+                    gpui::div()
+                        .text_color(theme.foreground)
+                        .child(after.to_string()),
+                )
+                .into_any_element()
+        };
+
+        let focus_handle = self.focus.clone();
+
+        gpui::div()
+            .id(self.id.clone())
+            .key_context("Input")
+            .track_focus(&self.focus)
+            .on_key_down(cx.listener(Self::handle_key_down))
+            .on_mouse_down(gpui::MouseButton::Left, move |_ev, window, _cx| {
+                window.focus(&focus_handle);
+            })
+            .relative()
+            .min_w(gpui::rems(12.))
+            .border_1()
+            .border_color(if is_focused {
+                theme.accent
+            } else {
+                theme.border
+            })
+            .bg(theme.background)
+            .rounded_md()
+            .p_2()
+            .cursor(gpui::CursorStyle::IBeam)
+            .child(content)
+            .child(self.render_suggestions(cx))
+    }
+}
+
+impl gpui::Focusable for Input {
+    fn focus_handle(&self, _: &gpui::App) -> gpui::FocusHandle {
+        self.focus.clone()
+    }
+}

src/components/input/suggestion.rs

@@ -0,0 +1,24 @@
+use gpui::SharedString;
+
+#[derive(Clone, Debug)]
+pub struct Suggestion {
+    pub label: SharedString,
+    pub insert: SharedString,
+}
+
+impl Suggestion {
+    pub fn new(label: impl Into<SharedString>, insert: impl Into<SharedString>) -> Self {
+        Self {
+            label: label.into(),
+            insert: insert.into(),
+        }
+    }
+
+    pub fn simple(text: impl Into<SharedString>) -> Self {
+        let text = text.into();
+        Self {
+            label: text.clone(),
+            insert: text,
+        }
+    }
+}

src/components/label.rs

@@ -0,0 +1,31 @@
+use gpui::prelude::*;
+
+use crate::theme::ActiveTheme;
+
+#[derive(gpui::IntoElement)]
+pub struct Label {
+    text: gpui::SharedString,
+}
+
+impl Label {
+    pub fn new(text: impl Into<gpui::SharedString>) -> Self {
+        Self { text: text.into() }
+    }
+}
+
+// impl gpui::Styled for Label {
+//     fn style(&mut self) -> &mut gpui::StyleRefinement {
+//         &mut self.style
+//     }
+// }
+
+impl RenderOnce for Label {
+    fn render(self, _window: &mut gpui::Window, cx: &mut gpui::App) -> impl gpui::IntoElement {
+        let theme = cx.theme();
+
+        gpui::div()
+            .line_height(gpui::rems(1.25))
+            .text_color(theme.foreground)
+            .child(gpui::StyledText::new(&self.text))
+    }
+}

src/components/list.rs

@@ -0,0 +1,198 @@
+use std::sync::Arc;
+
+use gpui::prelude::*;
+
+use crate::theme::ActiveTheme;
+
+#[derive(Clone, Debug)]
+pub struct ListItem {
+    pub label: gpui::SharedString,
+    pub disabled: bool,
+}
+
+impl ListItem {
+    pub fn new(label: impl Into<gpui::SharedString>) -> Self {
+        Self {
+            label: label.into(),
+            disabled: false,
+        }
+    }
+
+    pub fn disabled(mut self, disabled: bool) -> Self {
+        self.disabled = disabled;
+        self
+    }
+}
+
+pub struct List {
+    id: gpui::ElementId,
+    items: Vec<ListItem>,
+    selected_index: Option<usize>,
+    height: Option<gpui::Pixels>,
+    on_click: Option<Arc<dyn Fn(usize, &ListItem, &mut gpui::Context<Self>) + Send + Sync>>,
+    on_hover: Option<Arc<dyn Fn(usize, bool, &ListItem, &mut gpui::Context<Self>) + Send + Sync>>,
+}
+
+impl List {
+    pub fn new(id: impl Into<gpui::ElementId>) -> Self {
+        Self {
+            id: id.into(),
+            items: Vec::new(),
+            selected_index: None,
+            height: None,
+            on_click: None,
+            on_hover: None,
+        }
+    }
+
+    pub fn item(mut self, item: ListItem) -> Self {
+        self.items.push(item);
+        self
+    }
+
+    pub fn items<I>(mut self, items: I) -> Self
+    where
+        I: IntoIterator<Item = ListItem>,
+    {
+        self.items = items.into_iter().collect();
+        self
+    }
+
+    pub fn selected_index(mut self, index: usize) -> Self {
+        self.selected_index = Some(index);
+        self
+    }
+
+    pub fn selected_index_value(&self) -> Option<usize> {
+        self.selected_index
+    }
+
+    pub fn selected_item(&self) -> Option<&ListItem> {
+        self.selected_index.and_then(|index| self.items.get(index))
+    }
+
+    pub fn height(mut self, height: gpui::Pixels) -> Self {
+        self.height = Some(height);
+        self
+    }
+
+    pub fn on_click(
+        mut self,
+        handler: Arc<dyn Fn(usize, &ListItem, &mut gpui::Context<Self>) + Send + Sync>,
+    ) -> Self {
+        self.on_click = Some(handler);
+        self
+    }
+
+    pub fn on_hover(
+        mut self,
+        handler: Arc<dyn Fn(usize, bool, &ListItem, &mut gpui::Context<Self>) + Send + Sync>,
+    ) -> Self {
+        self.on_hover = Some(handler);
+        self
+    }
+
+    fn click_item(&mut self, index: usize, cx: &mut gpui::Context<Self>) {
+        let item = match self.items.get(index) {
+            Some(item) => item,
+            None => return,
+        };
+
+        if item.disabled {
+            return;
+        }
+
+        self.selected_index = Some(index);
+
+        if let Some(on_click) = self.on_click.clone() {
+            on_click(index, item, cx);
+        }
+
+        cx.notify();
+    }
+
+    fn hover_item(&mut self, index: usize, hovering: bool, cx: &mut gpui::Context<Self>) {
+        let item = match self.items.get(index) {
+            Some(item) => item,
+            None => return,
+        };
+
+        if item.disabled {
+            return;
+        }
+
+        if let Some(on_hover) = self.on_hover.clone() {
+            on_hover(index, hovering, item, cx);
+        }
+    }
+}
+
+impl gpui::Render for List {
+    fn render(
+        &mut self,
+        _window: &mut gpui::Window,
+        cx: &mut gpui::Context<Self>,
+    ) -> impl IntoElement {
+        let theme = cx.theme();
+
+        let items: Vec<gpui::AnyElement> = self
+            .items
+            .iter()
+            .enumerate()
+            .map(|(index, item)| {
+                let is_selected = self.selected_index == Some(index);
+
+                let mut row = gpui::div()
+                    .id(index)
+                    .w_full()
+                    .px_2()
+                    .py_1()
+                    .text_color(if is_selected {
+                        theme.selection_foreground
+                    } else {
+                        theme.foreground
+                    })
+                    .when(is_selected, |el| el.bg(theme.selection))
+                    .hover(|s: gpui::StyleRefinement| s.bg(theme.selection))
+                    .child(item.label.clone());
+
+                if item.disabled {
+                    row = row.text_color(theme.muted).cursor_not_allowed();
+                } else {
+                    row = row
+                        .cursor_pointer()
+                        .on_mouse_down(
+                            gpui::MouseButton::Left,
+                            cx.listener(move |this, _event, _window, cx| {
+                                this.click_item(index, cx);
+                            }),
+                        )
+                        .on_hover(cx.listener(move |this, hovering, _window, cx| {
+                            this.hover_item(index, *hovering, cx);
+                        }));
+                }
+
+                row.into_any_element()
+            })
+            .collect();
+
+        let mut container = gpui::div()
+            .id(self.id.clone())
+            .flex()
+            .flex_col()
+            .w_full()
+            .border_1()
+            .border_color(theme.border)
+            .bg(theme.panel)
+            .rounded_md()
+            .overflow_y_scroll()
+            .scrollbar_width(gpui::px(6.0))
+            .children(items);
+
+        if let Some(height) = self.height {
+            container = container.h(height);
+        }
+
+        container
+    }
+}

src/components/mod.rs

@@ -0,0 +1,8 @@
+pub mod button;
+pub mod divider;
+pub mod icon;
+pub mod input;
+pub mod label;
+pub mod list;
+pub mod modal;
+pub mod panel;

src/components/modal.rs

@@ -0,0 +1,369 @@
+use std::sync::Arc;
+
+use gpui::prelude::*;
+
+use crate::components::button::{Button, ButtonVariants};
+use crate::theme::ActiveTheme;
+
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+pub enum ModalAction {
+    Close,
+    Cancel,
+    Save,
+}
+
+#[derive(Clone, Debug, Default)]
+pub struct ModalState {
+    pub open: bool,
+    pub last_action: Option<ModalAction>,
+}
+
+pub struct Modal {
+    id: gpui::ElementId,
+    focus: gpui::FocusHandle,
+    title: Option<gpui::SharedString>,
+    content: Vec<Arc<dyn Fn() -> gpui::AnyElement + Send + Sync>>,
+    footer: Vec<Arc<dyn Fn() -> gpui::AnyElement + Send + Sync>>,
+    width: Option<gpui::Pixels>,
+    open: bool,
+    close_on_backdrop: bool,
+    last_action: Option<ModalAction>,
+    on_close: Option<Arc<dyn Fn(ModalAction, &mut gpui::Context<Self>) + Send + Sync>>,
+    on_save: Option<Arc<dyn Fn(&mut gpui::Context<Self>) + Send + Sync>>,
+    on_cancel: Option<Arc<dyn Fn(&mut gpui::Context<Self>) + Send + Sync>>,
+}
+
+impl Modal {
+    pub fn new(id: impl Into<gpui::ElementId>, cx: &mut gpui::Context<Self>) -> Self {
+        Self {
+            id: id.into(),
+            focus: cx.focus_handle(),
+            title: None,
+            content: Vec::new(),
+            footer: Vec::new(),
+            width: Some(gpui::px(520.0)),
+            open: false,
+            close_on_backdrop: true,
+            last_action: None,
+            on_close: None,
+            on_save: None,
+            on_cancel: None,
+        }
+    }
+
+    pub fn title(mut self, title: impl Into<gpui::SharedString>) -> Self {
+        self.title = Some(title.into());
+        self
+    }
+
+    pub fn width(mut self, width: gpui::Pixels) -> Self {
+        self.width = Some(width);
+        self
+    }
+
+    pub fn close_on_backdrop(mut self, close: bool) -> Self {
+        self.close_on_backdrop = close;
+        self
+    }
+
+    pub fn child<E>(mut self, child: E) -> Self
+    where
+        E: gpui::IntoElement + Clone + Send + Sync + 'static,
+    {
+        let element = child.clone();
+        self.content
+            .push(Arc::new(move || element.clone().into_any_element()));
+        self
+    }
+
+    pub fn children<E>(mut self, children: impl IntoIterator<Item = E>) -> Self
+    where
+        E: gpui::IntoElement + Clone + Send + Sync + 'static,
+    {
+        self.content.extend(
+            children
+                .into_iter()
+                .map(|child| {
+                    let element = child.clone();
+                    Arc::new(move || element.clone().into_any_element())
+                        as Arc<dyn Fn() -> gpui::AnyElement + Send + Sync>
+                })
+                .collect::<Vec<_>>(),
+        );
+        self
+    }
+
+    pub fn footer_child<E>(mut self, child: E) -> Self
+    where
+        E: gpui::IntoElement + Clone + Send + Sync + 'static,
+    {
+        let element = child.clone();
+        self.footer
+            .push(Arc::new(move || element.clone().into_any_element()));
+        self
+    }
+
+    pub fn footer_children<E>(mut self, children: impl IntoIterator<Item = E>) -> Self
+    where
+        E: gpui::IntoElement + Clone + Send + Sync + 'static,
+    {
+        self.footer.extend(
+            children
+                .into_iter()
+                .map(|child| {
+                    let element = child.clone();
+                    Arc::new(move || element.clone().into_any_element())
+                        as Arc<dyn Fn() -> gpui::AnyElement + Send + Sync>
+                })
+                .collect::<Vec<_>>(),
+        );
+        self
+    }
+
+    pub fn on_close(
+        mut self,
+        handler: Arc<dyn Fn(ModalAction, &mut gpui::Context<Self>) + Send + Sync>,
+    ) -> Self {
+        self.on_close = Some(handler);
+        self
+    }
+
+    pub fn on_save(mut self, handler: Arc<dyn Fn(&mut gpui::Context<Self>) + Send + Sync>) -> Self {
+        self.on_save = Some(handler);
+        self
+    }
+
+    pub fn on_cancel(
+        mut self,
+        handler: Arc<dyn Fn(&mut gpui::Context<Self>) + Send + Sync>,
+    ) -> Self {
+        self.on_cancel = Some(handler);
+        self
+    }
+
+    pub fn set_open(&mut self, open: bool, cx: &mut gpui::Context<Self>) {
+        if self.open == open {
+            return;
+        }
+        self.open = open;
+        cx.notify();
+    }
+
+    pub fn open(&mut self, cx: &mut gpui::Context<Self>) {
+        self.set_open(true, cx);
+    }
+
+    pub fn close(&mut self, cx: &mut gpui::Context<Self>) {
+        self.close_with_action(ModalAction::Close, cx);
+    }
+
+    pub fn toggle(&mut self, cx: &mut gpui::Context<Self>) {
+        let next = !self.open;
+        self.set_open(next, cx);
+    }
+
+    pub fn is_open(&self) -> bool {
+        self.open
+    }
+
+    pub fn focus_handle(&self) -> &gpui::FocusHandle {
+        &self.focus
+    }
+
+    pub fn state(&self) -> ModalState {
+        ModalState {
+            open: self.open,
+            last_action: self.last_action,
+        }
+    }
+
+    pub fn last_action(&self) -> Option<ModalAction> {
+        self.last_action
+    }
+
+    pub fn take_last_action(&mut self) -> Option<ModalAction> {
+        self.last_action.take()
+    }
+
+    fn close_with_action(&mut self, action: ModalAction, cx: &mut gpui::Context<Self>) {
+        self.last_action = Some(action);
+
+        if let Some(on_close) = self.on_close.clone() {
+            on_close(action, cx);
+        }
+
+        self.open = false;
+        cx.notify();
+    }
+
+    fn handle_backdrop_mouse_down(
+        &mut self,
+        _event: &gpui::MouseDownEvent,
+        _window: &mut gpui::Window,
+        cx: &mut gpui::Context<Self>,
+    ) {
+        if self.close_on_backdrop {
+            self.close_with_action(ModalAction::Close, cx);
+        }
+    }
+
+    fn handle_cancel(&mut self, cx: &mut gpui::Context<Self>) {
+        if let Some(on_cancel) = self.on_cancel.clone() {
+            on_cancel(cx);
+        }
+        self.close_with_action(ModalAction::Cancel, cx);
+    }
+
+    fn handle_save(&mut self, cx: &mut gpui::Context<Self>) {
+        if let Some(on_save) = self.on_save.clone() {
+            on_save(cx);
+        }
+        self.close_with_action(ModalAction::Save, cx);
+    }
+}
+
+impl gpui::Render for Modal {
+    fn render(
+        &mut self,
+        _window: &mut gpui::Window,
+        cx: &mut gpui::Context<Self>,
+    ) -> impl IntoElement {
+        if !self.open {
+            return gpui::Empty.into_any_element();
+        }
+
+        let theme = cx.theme();
+
+        let title = self.title.clone().map(|title| {
+            gpui::div()
+                .px_3()
+                .py_2()
+                .text_color(theme.foreground)
+                .child(title)
+                .into_any_element()
+        });
+
+        let body: Vec<gpui::AnyElement> = self
+            .content
+            .iter()
+            .enumerate()
+            .map(|(ix, build)| gpui::div().id(ix).child(build()).into_any_element())
+            .collect();
+
+        let mut footer: Vec<gpui::AnyElement> = self.footer.iter().map(|build| build()).collect();
+
+        if footer.is_empty() {
+            let mut actions = Vec::new();
+            if self.on_cancel.is_some() {
+                actions.push(
+                    Button::label((self.id.clone(), "cancel"), "Cancel")
+                        .text()
+                        .on_click(cx.listener(|this, _e, _w, cx| {
+                            this.handle_cancel(cx);
+                        }))
+                        .into_any_element(),
+                );
+            }
+            if self.on_save.is_some() {
+                actions.push(
+                    Button::label((self.id.clone(), "save"), "Save")
+                        .primary()
+                        .on_click(cx.listener(|this, _e, _w, cx| {
+                            this.handle_save(cx);
+                        }))
+                        .into_any_element(),
+                );
+            }
+
+            if !actions.is_empty() {
+                footer = actions;
+            }
+        }
+
+        let footer = if footer.is_empty() {
+            gpui::div().into_any_element()
+        } else {
+            gpui::div()
+                .px_3()
+                .py_2()
+                .flex()
+                .flex_row()
+                .justify_end()
+                .gap_2()
+                .children(footer)
+                .into_any_element()
+        };
+
+        let mut panel = gpui::div()
+            .id(gpui::ElementId::Name(format!("{}-panel", self.id).into()))
+            .flex()
+            .flex_col()
+            .bg(theme.panel)
+            .border_1()
+            .border_color(theme.border)
+            .rounded_md()
+            .children(title)
+            .child(
+                gpui::div()
+                    .px_3()
+                    .py_2()
+                    .flex()
+                    .flex_col()
+                    .gap_2()
+                    .children(body),
+            )
+            .child(footer)
+            .block_mouse_except_scroll()
+            .track_focus(&self.focus)
+            .on_key_down(
+                cx.listener(|this, event: &gpui::KeyDownEvent, _window, cx| {
+                    if event.keystroke.key.as_str() == "escape" {
+                        this.close_with_action(ModalAction::Cancel, cx);
+                    }
+                }),
+            );
+
+        if let Some(width) = self.width {
+            panel = panel.w(width);
+        }
+
+        let panel_wrap = if self.close_on_backdrop {
+            gpui::div()
+                .child(panel)
+                .on_mouse_down_out(cx.listener(|this, event, window, cx| {
+                    this.handle_backdrop_mouse_down(event, window, cx);
+                }))
+        } else {
+            gpui::div().child(panel)
+        };
+
+        gpui::div()
+            .id(self.id.clone())
+            .size_full()
+            .absolute()
+            .top_0()
+            .left_0()
+            .occlude()
+            .child(
+                gpui::div()
+                    .size_full()
+                    .bg(gpui::rgba(0x00000080))
+                    .absolute()
+                    .top_0()
+                    .left_0(),
+            )
+            .child(
+                gpui::div()
+                    .size_full()
+                    .absolute()
+                    .top_0()
+                    .left_0()
+                    .flex()
+                    .flex_col()
+                    .items_center()
+                    .justify_center()
+                    .child(panel_wrap),
+            )
+            .into_any_element()
+    }
+}

src/components/panel.rs

@@ -0,0 +1,88 @@
+use gpui::prelude::*;
+
+use crate::theme::ActiveTheme;
+
+#[derive(gpui::IntoElement)]
+pub struct Panel {
+    content: Vec<gpui::AnyElement>,
+    title: Option<String>,
+    border: f32,
+    padding: f32,
+}
+
+impl Panel {
+    pub fn new() -> Self {
+        Self {
+            content: Vec::new(),
+            title: None,
+            border: 1.0,
+            padding: 8.0,
+        }
+    }
+
+    pub fn title(mut self, title: impl Into<String>) -> Self {
+        self.title = Some(title.into());
+        self
+    }
+
+    pub fn border(mut self, border: f32) -> Self {
+        self.border = border;
+        self
+    }
+
+    pub fn padding(mut self, padding: f32) -> Self {
+        self.padding = padding;
+        self
+    }
+
+    pub fn child(mut self, child: impl gpui::IntoElement) -> Self {
+        self.content.push(child.into_any_element());
+        self
+    }
+
+    pub fn children<E>(mut self, children: impl IntoIterator<Item = E>) -> Self
+    where
+        E: gpui::IntoElement,
+    {
+        self.content
+            .extend(children.into_iter().map(|c| c.into_any_element()));
+        self
+    }
+}
+
+impl gpui::RenderOnce for Panel {
+    fn render(mut self, _window: &mut gpui::Window, cx: &mut gpui::App) -> impl IntoElement {
+        let theme = cx.theme();
+
+        let header = self.title.as_ref().map(|title| {
+            gpui::div()
+                .px_2()
+                .py_1()
+                .text_sm()
+                .text_color(theme.muted)
+                .border_b(gpui::px(self.border))
+                .border_color(theme.border)
+                .child(title.clone())
+                .into_any_element()
+        });
+
+        let children: Vec<gpui::AnyElement> = self
+            .content
+            .drain(..)
+            .enumerate()
+            .map(|(ix, c)| gpui::div().id(ix).child(c).into_any_element())
+            .collect();
+
+        gpui::div()
+            .size_full()
+            .bg(theme.panel)
+            .border(gpui::px(self.border))
+            .border_color(theme.border)
+            .rounded_md()
+            .p(gpui::px(self.padding))
+            .flex()
+            .flex_col()
+            .children(header)
+            .children(children)
+    }
+}

src/main.rs

@@ -1,91 +1,9 @@
-use gpui::{
-    prelude::*, App, Application, Context, CursorStyle, KeyDownEvent, SharedString, Window,
-    WindowOptions,
-};
+use crate::app::App;
 
-struct HelloWorld {
-    text: SharedString,
-    focus_handle: gpui::FocusHandle,
-}
-
-impl Render for HelloWorld {
-    fn render(&mut self, _window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
-        let input_content = if self.text.is_empty() {
-            gpui::div()
-                .text_color(gpui::rgb(0x888888))
-                .child("Escribe aqui...")
-        } else {
-            gpui::div().child(self.text.clone())
-        };
-
-        gpui::div()
-            .size_full()
-            .bg(gpui::white())
-            .flex()
-            .flex_col()
-            .gap_3()
-            .justify_center()
-            .items_center()
-            .text_3xl()
-            .child(
-                gpui::div()
-                    .min_w(gpui::rems(12.))
-                    .border_1()
-                    .border_color(gpui::black())
-                    .bg(gpui::white())
-                    .p_2()
-                    .cursor(CursorStyle::IBeam)
-                    .track_focus(&self.focus_handle)
-                    .on_key_down(cx.listener(Self::on_key_down))
-                    .child(input_content),
-            )
-            .child(format!("Hello, {}!", &self.text))
-    }
-}
-
-impl HelloWorld {
-    fn on_key_down(
-        &mut self,
-        event: &KeyDownEvent,
-        _window: &mut Window,
-        cx: &mut Context<Self>,
-    ) {
-        let mut next = self.text.to_string();
-        match event.keystroke.key.as_str() {
-            "backspace" | "delete" => {
-                next.pop();
-            }
-            _ => {
-                let Some(ch) = event.keystroke.key_char.as_ref() else {
-                    return;
-                };
-                if ch == "\n" || ch == "\r" {
-                    return;
-                }
-                next.push_str(ch);
-            }
-        }
-
-        if next != self.text.as_str() {
-            self.text = next.into();
-            cx.notify();
-        }
-    }
-}
+mod app;
+mod components;
+mod theme;
 
 fn main() {
-    let app = Application::new();
-
-    app.run(|app: &mut App| {
-        app.open_window(
-            WindowOptions::default(),
-            |_window: &mut Window, app: &mut App| {
-                app.new(|cx: &mut Context<'_, HelloWorld>| HelloWorld {
-                    text: SharedString::from("World"),
-                    focus_handle: cx.focus_handle(),
-                })
-            },
-        )
-        .unwrap();
-    });
+    App::run();
 }

src/theme.rs

@@ -0,0 +1,70 @@
+pub type Color = gpui::Rgba;
+
+#[derive(Debug, Clone)]
+pub struct Theme {
+    pub background: Color,
+    pub foreground: Color,
+    pub panel: Color,
+    pub muted: Color,
+    pub accent: Color,
+    pub border: Color,
+    pub error: Color,
+    pub success: Color,
+    pub selection: Color,
+    pub selection_foreground: Color,
+    pub text: Color,
+    pub text_size: Option<gpui::Size<u32>>,
+}
+
+impl Theme {
+    pub fn dark() -> Self {
+        Self {
+            background: gpui::rgb(0x1E1E2E),
+            panel: gpui::rgb(0x181825),
+            foreground: gpui::rgb(0xCDD6F4),
+            muted: gpui::rgb(0x7F849C),
+            accent: gpui::rgb(0x89B4FA),
+            border: gpui::rgb(0x313244),
+            error: gpui::rgb(0xF38BA8),
+            success: gpui::rgb(0xA6E3A1),
+            selection: gpui::rgb(0x45475A),
+            selection_foreground: gpui::rgb(0xCDD6F4),
+            text: gpui::rgb(0xCDD6F4),
+            text_size: Some(gpui::Size::new(14, 14)),
+        }
+    }
+
+    pub fn light() -> Self {
+        Self {
+            background: gpui::rgb(0xF5F5F5),
+            panel: gpui::rgb(0xF0F0F0),
+            foreground: gpui::rgb(0x333333),
+            muted: gpui::rgb(0x999999),
+            accent: gpui::rgb(0x0078D4),
+            border: gpui::rgb(0xE0E0E0),
+            error: gpui::rgb(0xFF4444),
+            success: gpui::rgb(0x4CAF50),
+            selection: gpui::rgb(0xD0D0D0),
+            selection_foreground: gpui::rgb(0x333333),
+            text: gpui::rgb(0x333333),
+            text_size: Some(gpui::Size::new(14, 14)),
+        }
+    }
+
+    pub fn global(app: &gpui::App) -> &Self {
+        app.global::<Self>()
+    }
+}
+
+impl gpui::Global for Theme {}
+
+pub trait ActiveTheme {
+    fn theme(&self) -> &Theme;
+}
+
+impl ActiveTheme for gpui::App {
+    #[inline(always)]
+    fn theme(&self) -> &Theme {
+        Theme::global(self)
+    }
+}