feat & fix: Add status bar with sync button and fix filter bugs

Added a status bar at the bottom with a sync button that updates the task list from the local database.
The button shows different states (idle, syncing, success, error) with colors and icons, and displays status messages.
Fixed the layout shift bug when clearing filters by giving dropdowns a minimum width.
Also fixed sidebar counts not updating when filters change - now the sidebar shows correct project and tag counts based on filtered tasks.

Extracted reusable button and dropdown styles to keep the UI consistent across components.

src/components/button/dropdown.rs

@@ -5,6 +5,7 @@ use gpui::prelude::*;
 use crate::components::button::Button;
 use crate::components::label::Label;
 use crate::theme::ActiveTheme;
+use crate::ui::{clickable_control_style, disabled_control_style};
 
 #[derive(Clone, Debug)]
 pub struct DropdownItem {
@@ -288,36 +289,20 @@ impl gpui::Render for Dropdown {
                 .text_color(theme.foreground)
                 .into_any_element()
         } else {
-            let mut trigger = gpui::div()
-                .flex()
-                .items_center()
-                .gap_2()
-                .px_3()
-                .py_2()
-                .rounded_md()
-                .border_1()
-                .border_color(theme.border)
-                .bg(theme.background)
-                .text_sm()
-                .text_color(theme.foreground)
-                .whitespace_nowrap()
+            let base = gpui::div()
                 .child(Label::new(label.clone()))
                 .child(Label::new(arrow).text_color(theme.muted));
 
-            if disabled {
-                trigger = trigger.text_color(theme.muted).cursor_not_allowed();
+            let trigger = if disabled {
+                disabled_control_style(base, theme)
             } else {
-                trigger = trigger
-                    .cursor_pointer()
-                    .hover(|s: gpui::StyleRefinement| s.bg(theme.hover));
-            }
+                clickable_control_style(base, theme)
+            };
 
             trigger.into_any_element()
         };
 
-        let mut trigger_wrap = gpui::div()
-            .flex_shrink_0()
-            .child(trigger);
+        let mut trigger_wrap = gpui::div().flex_shrink_0().child(trigger);
         if !disabled {
             trigger_wrap = trigger_wrap.on_mouse_down(
                 gpui::MouseButton::Left,