[idea] Wire fzf-lua LSP pickers for references, document symbols, and workspace symbols #119

What

Add keymaps that route LSP actions through fzf-lua's built-in LSP pickers instead of dumping results directly into the quickfix list. Specifically: references, document symbols, and workspace symbols.

Where

lua/config/plugin_config.lua — add inside the LspAttach callback and the fzf setup block (around lines 30–38 for fzf keymaps, line 104 for LspAttach).

Why it matters

The config already uses fzf-lua extensively (<leader><leader> files, <leader>/ live grep, <leader>sl lines, <leader>sb buffers, <leader>gc/gb/gB/gs git pickers). But LSP navigation falls back to raw Neovim behaviour: gd calls vim.lsp.buf.definition which jumps directly, and there are no keymaps for references or symbols at all.

fzf-lua ships first-class LSP pickers (fzf.lsp_references, fzf.lsp_document_symbols, fzf.lsp_live_workspace_symbols) that integrate the same fuzzy-search UX already used for files and grep. Wiring them closes the gap between file/text search and code navigation — you can fuzzy-filter a long references list, preview the call site, and pick the right one, rather than paging through a quickfix list.

Given that several heavy LSPs are enabled simultaneously (pyright + pyrefly for Python, clangd for C/C++), references lists can be large and fuzzy-picking is noticeably more ergonomic.

Suggested implementation sketch

-- inside fzf setup block (only if fzf loaded):
vim.keymap.set("n", "<leader>lr", fzf.lsp_references,              { desc = "LSP references (fzf)" })
vim.keymap.set("n", "<leader>ls", fzf.lsp_document_symbols,        { desc = "LSP document symbols" })
vim.keymap.set("n", "<leader>lS", fzf.lsp_live_workspace_symbols,  { desc = "LSP workspace symbols" })

-- optionally upgrade gd to open in fzf when there are multiple definitions:
vim.keymap.set("n", "gd", fzf.lsp_definitions, { buffer = ev.buf, desc = "Go to definition (fzf)" })

<leader>l is already the formatting namespace; <leader>lr/ls/lS keeps LSP actions grouped. gd upgrade is optional — fzf-lua falls back to a direct jump when there is only one definition, matching current behaviour.