refactor(picker_utils): create a base picker

This creates a base picker module to make it as easy as possible to
create new ones with the same pattern

It also aligns the date to the right properly for every picker

Author: sudo-tee

lua/opencode/config.lua

@@ -86,6 +86,7 @@ M.defaults = {
     input_position = 'bottom',
     window_width = 0.40,
     input_height = 0.15,
+    picker_width = 100,
     display_model = true,
     display_context_size = true,
     display_cost = true,

lua/opencode/core.lua

@@ -37,8 +37,6 @@ function M.switch_session(session_id)
   state.active_session = selected_session
   if state.windows then
     state.restore_points = {}
-    -- Don't need to update either renderer because they subscribe to
-    -- session changes
     ui.focus_input()
   else
     M.open()

lua/opencode/types.lua

@@ -72,6 +72,7 @@
 ---@field output_window OpencodeKeymapOutputWindow
 ---@field permission OpencodeKeymapPermission
 ---@field session_picker OpencodeSessionPickerKeymap
+---@field timeline_picker OpencodeTimelinePickerKeymap
 
 ---@class OpencodeSessionPickerKeymap
 ---@field delete_session OpencodeKeymapEntry
@@ -99,6 +100,7 @@
 ---@field input_position 'bottom'|'top' # Position of the input window (default: 'bottom')
 ---@field window_width number
 ---@field input_height number
+---@field picker_width number|nil # Default width for all pickers (nil uses current window width)
 ---@field display_model boolean
 ---@field display_context_size boolean
 ---@field display_cost boolean