fix(autocomplete): Cursor igual que TextInput - altura completa + parpadeo

- Altura del cursor: inner.h (toda la altura del campo, no 8px fijos)
- Posición Y: inner.y (no centrado en el texto)
- Parpadeo: usa CURSOR_BLINK_PERIOD_MS y CURSOR_IDLE_TIMEOUT_MS
- Lógica idéntica a TextInput para consistencia visual

src/widgets/autocomplete.zig

@@ -59,6 +59,10 @@ pub const AutoCompleteState = struct {
         @memcpy(self.buffer[0..copy_len], new_text[0..copy_len]);
         self.len = copy_len;
         self.cursor = copy_len;
+
+        // Sync filter to avoid spurious text_changed events
+        @memcpy(self.last_filter[0..copy_len], new_text[0..copy_len]);
+        self.last_filter_len = copy_len;
     }
 
     /// Clear the input
@@ -68,6 +72,7 @@ pub const AutoCompleteState = struct {
         self.selected = -1;
         self.highlighted = -1;
         self.open = false;
+        self.last_filter_len = 0;
     }
 
     /// Insert a single character at cursor
@@ -370,12 +375,28 @@ pub fn autocompleteRect(
         ctx.pushCommand(Command.text(inner.x, text_y, config.placeholder, Style.Color.rgb(100, 100, 100)));
     }
 
-    // Draw cursor if focused
+    // Draw cursor if focused (same style as TextInput)
     if (is_focused and !config.disabled) {
-        // Use ctx.measureTextToCursor for accurate cursor positioning with variable-width fonts
-        const cursor_offset = ctx.measureTextToCursor(filter_text, state.cursor);
-        const cursor_x = inner.x + @as(i32, @intCast(cursor_offset));
-        ctx.pushCommand(Command.rect(cursor_x, text_y, 2, char_height, Style.Color.rgb(200, 200, 200)));
+        // Cursor blink logic (identical to TextInput)
+        const cursor_visible = blk: {
+            if (ctx.current_time_ms == 0) break :blk true;
+            const idle_time = ctx.current_time_ms -| ctx.last_input_time_ms;
+            if (idle_time >= Context.CURSOR_IDLE_TIMEOUT_MS) {
+                // Idle: cursor always visible (solid, no blink)
+                break :blk true;
+            } else {
+                // Active: cursor blinks
+                break :blk (ctx.current_time_ms / Context.CURSOR_BLINK_PERIOD_MS) % 2 == 0;
+            }
+        };
+
+        if (cursor_visible) {
+            // Use ctx.measureTextToCursor for accurate cursor positioning with variable-width fonts
+            const cursor_offset = ctx.measureTextToCursor(filter_text, state.cursor);
+            const cursor_x = inner.x + @as(i32, @intCast(cursor_offset));
+            // Full height cursor (inner.h), same as TextInput
+            ctx.pushCommand(Command.rect(cursor_x, inner.y, 2, inner.h, Style.Color.rgb(200, 200, 200)));
+        }
     }
 
     // Draw dropdown arrow
@@ -403,11 +424,15 @@ pub fn autocompleteRect(
     var filtered_indices: [256]usize = undefined;
     var filtered_count: usize = 0;
 
-    for (options, 0..) |opt, i| {
-        if (filtered_count >= filtered_indices.len) break;
-        if (matchesFilter(opt, filter_text, config.match_mode, config.case_sensitive)) {
-            filtered_indices[filtered_count] = i;
-            filtered_count += 1;
+    if (options.len == 0) {
+        state.closeDropdown();
+    } else {
+        for (options, 0..) |opt, i| {
+            if (filtered_count >= filtered_indices.len) break;
+            if (matchesFilter(opt, filter_text, config.match_mode, config.case_sensitive)) {
+                filtered_indices[filtered_count] = i;
+                filtered_count += 1;
+            }
         }
     }