feat: Allow inline buttons and popup confirmation for both ACP and normal Providers (#2760)

Co-authored-by: pre-commit-ci-lite[bot] <117423508+pre-commit-ci-lite[bot]@users.noreply.github.com>

lua/avante/ui/acp_confirm_adapter.lua

@@ -0,0 +1,65 @@
+local Highlights = require("avante.highlights")
+
+---@class avante.ui.ConfirmAdapter
+local M = {}
+
+---@class avante.ui.ACPConfirmAdapter.ACPMappedOptions
+---@field yes? string
+---@field all? string
+---@field no? string
+
+---Converts the ACP permission options to confirmation popup-compatible format (yes/all/no)
+---@param options avante.acp.PermissionOption[]
+---@return avante.ui.ACPConfirmAdapter.ACPMappedOptions
+function M.map_acp_options(options)
+  local option_map = { yes = nil, all = nil, no = nil }
+
+  for _, opt in ipairs(options) do
+    if opt.kind == "allow_once" then
+      option_map.yes = opt.optionId
+    elseif opt.kind == "allow_always" then
+      option_map.all = opt.optionId
+    elseif opt.kind == "reject_once" then
+      option_map.no = opt.optionId
+
+      -- elseif opt.kind == "reject_always" then
+      -- ignore, no 4th option in the confirm popup yet
+    end
+  end
+
+  return option_map
+end
+
+---@class avante.ui.ACPConfirmAdapter.ButtonOption
+---@field id string
+---@field icon string
+---@field name string
+---@field hl? string
+
+---@param options avante.acp.PermissionOption[]
+---@return avante.ui.ACPConfirmAdapter.ButtonOption[]
+function M.generate_buttons_for_acp_options(options)
+  local items = vim
+    .iter(options)
+    :map(function(item)
+      ---@cast item avante.acp.PermissionOption
+      local icon = item.kind == "allow_once" and "" or ""
+      if item.kind == "allow_always" then icon = "" end
+      local hl = nil
+      if item.kind == "reject_once" or item.kind == "reject_always" then hl = Highlights.BUTTON_DANGER_HOVER end
+      ---@type avante.ui.ACPConfirmAdapter.ButtonOption
+      local button = {
+        id = item.optionId,
+        name = item.name,
+        icon = icon,
+        hl = hl,
+      }
+      return button
+    end)
+    :totable()
+  -- Sort to have "allow" first, then "allow always", then "reject"
+  table.sort(items, function(a, b) return a.name < b.name end)
+  return items
+end
+
+return M