feat(config): add pre-save LSP code actions and UI toggle helpers

lua/config/picker.lua

@@ -0,0 +1,21 @@
+--- Shared snacks.picker helpers.
+--- @module config.picker
+
+local M = {}
+
+--- Open a snacks picker with trouble.nvim's send-to-list action bound to <C-t>,
+--- so a picker result set can be promoted to a persistent Trouble list.
+--- @param source string snacks.picker source name (e.g. "diagnostics")
+--- @param opts? snacks.picker.Config extra picker options
+function M.with_trouble(source, opts)
+  opts = opts or {}
+  opts.actions = require("trouble.sources.snacks").actions
+  opts.win = opts.win or {}
+  opts.win.input = opts.win.input or {}
+  opts.win.input.keys = vim.tbl_extend("force", opts.win.input.keys or {}, {
+    ["<c-t>"] = { "trouble_open", mode = { "n", "i" } },
+  })
+  require("snacks").picker[source](opts)
+end
+
+return M