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

lua/config/toggles.lua

@@ -0,0 +1,59 @@
+--- UI toggles for the `<Leader>u` group, registered through
+--- `Snacks.toggle():map()` instead of plain astrocore mappings.
+---
+--- That is what buys the snacks default which-key integration: each toggle
+--- adds its own which-key entry with the enabled/disabled state icon, the
+--- green/yellow state colour, and an "Enable X" / "Disable X" label that
+--- flips with the current value. Plain `vim.keymap.set` mappings only ever
+--- show a static description.
+---
+--- Called from polish.lua, i.e. after astrocore has installed its own
+--- `<Leader>u` defaults, so these win on the keys they share. Toggles
+--- AstroNvim provides and snacks does not (`<Leader>ub` background,
+--- `<Leader>uA` autochdir, ...) are left alone.
+--- @module config.toggles
+
+local M = {}
+
+function M.setup()
+  local ok, Snacks = pcall(require, "snacks")
+  if not ok then return end
+  local toggle = Snacks.toggle
+
+  toggle.diagnostics():map "<Leader>ud"
+  toggle.line_number():map "<Leader>un"
+  toggle.option("relativenumber", { name = "Relative Numbers" }):map "<Leader>ur"
+  toggle.option("wrap", { name = "Wrap" }):map "<Leader>uw"
+  toggle.option("spell", { name = "Spelling" }):map "<Leader>us"
+  toggle.option("conceallevel", { off = 0, on = 2, name = "Conceal" }):map "<Leader>uc"
+  toggle.inlay_hints():map "<Leader>ui"
+  toggle.treesitter():map "<Leader>ut"
+  toggle.indent():map "<Leader>uI"
+  toggle.dim():map "<Leader>ux"
+  toggle.zen():map "<Leader>uz"
+  toggle.zoom():map "<Leader>uZ"
+  toggle.animate():map "<Leader>ua"
+  toggle.scroll():map "<Leader>uS"
+  toggle.profiler():map "<Leader>up"
+  toggle.profiler_highlights():map "<Leader>uh"
+
+  -- conform owns format-on-save (astrocommunity conform pack) and gates it on
+  -- vim.b.autoformat / vim.g.autoformat; the pre-save LSP code action pass
+  -- rides the same hook, so this one flag governs the whole on-save pipeline.
+  -- Mirrors the pack's own <Leader>uF, with which-key state on top.
+  toggle({
+    name = "Format on Save",
+    get = function() return vim.F.if_nil(vim.b.autoformat, vim.g.autoformat, true) end,
+    set = function(state) vim.g.autoformat, vim.b.autoformat = state, nil end,
+  }):map "<Leader>uf"
+
+  -- virtual_lines is native since 0.11; showing both at once is unreadable,
+  -- so the two diagnostic renderers trade places
+  toggle({
+    name = "Diagnostic Virtual Lines",
+    get = function() return ((vim.diagnostic.config() or {}).virtual_lines and true) or false end,
+    set = function(state) vim.diagnostic.config { virtual_lines = state, virtual_text = not state } end,
+  }):map "<Leader>ul"
+end
+
+return M