[plugins] flash.nvim and grug-far.nvim — navigation and project-wide replace

[stanfish06]

What

Two well-maintained plugins that fill gaps in the current setup without overlapping anything already installed.

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flash.nvim — folke/flash.nvim

Rationale: vim-sneak (installed as sneaks.vim) provides 2-char forward/backward seek with label mode. flash.nvim is the modern successor pattern: same core motion but with Treesitter-aware jumping (jump directly to a specific AST node), remote operations (yr to yank remote without moving), and first-class f/t/F/T enhancement. The existing plugin_config.lua already remaps f/F/t/T to Sneak variants — flash.nvim can take over those same bindings and do strictly more.

Key additions over vim-sneak:

• Treesitter jump mode (<C-s> in operator-pending: picks by node type)
• Remote flash (r in operator-pending: apply op at a remote location without moving)
• Search enhancement (jump directly from / results with labels)
• Maintained and Neovim-native (Lua, no Vimscript)

Migration is low-risk: replace the f/F/t/T remaps in plugin_config.lua with flash equivalents and remove vim-sneak from package_list.

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grug-far.nvim — MagicDuck/grug-far.nvim

Rationale: The current setup has excellent search (fzf.live_grep, fzf.files) but no project-wide replace tool. :s///g is buffer-local; the quickfix + cfdo workflow works but is manual. grug-far.nvim opens a buffer-based live search-and-replace backed by rg (which is already required for fzf.live_grep), lets you edit matches inline, and syncs changes back to their source files. It slots directly into the existing <leader>g* git and <leader>/ grep keyspace.

Suggested keymap:

vim.keymap.set({"n","v"}, "<leader>sr", "<cmd>GrugFar<CR>", { desc = "Search and replace (project)" })
vim.keymap.set("n", "<leader>sR", function()
    require("grug-far").open({ prefills = { search = vim.fn.expand("<cword>") } })
end, { desc = "Search and replace (word under cursor)" })

No conflicts with existing keymaps.