feat(neovim): Show codelens virtual text for implementations

- Rust: `rust-analyzer` enable `lens`
- Rust: Refresh lens on LspAttach and subsequently on rust buffers
- Use `LspSaga` for all other lsp types to show codelens

common/.config/nvim/after/ftplugin/rust.lua

@@ -7,8 +7,26 @@ if pcall(require, "rustaceanvim") then
     vim.keymap.set("n", "<leader>rh", "<cmd>RustLsp openDocs<cr>", { desc = "Open docs.rs Documentation" })
     vim.keymap.set("n", "<leader>rM", "<cmd>RustLsp view mir<cr>", { desc = "View Mid-Level IR", buffer = bufnr })
     vim.keymap.set("n", "<leader>rH", "<cmd>RustLsp view hir<cr>", { desc = "View High-Level IR", buffer = bufnr })
+    vim.keymap.set("n", "<leader>rL", vim.lsp.codelens.refresh, { desc = "Run CodeLens" })
 end
 
+vim.api.nvim_create_autocmd("LspAttach", {
+    callback = function(event)
+        local client = vim.lsp.get_client_by_id(event.data.client_id)
+        if not client or client.name ~= "rust-analyzer" then
+            return
+        end
+
+        pcall(vim.lsp.codelens.refresh)
+
+        -- Setup ongoing refresh triggers
+        vim.api.nvim_create_autocmd({ "InsertLeave", "BufWritePost", "BufEnter" }, {
+            buffer = event.buf,
+            callback = vim.lsp.codelens.refresh,
+        })
+    end,
+})
+
 local function run_tests_with_coverage()
     -- Run tests through neotest
     require("neotest").run.run(vim.fn.expand("%"))

common/.config/nvim/lua/plugins/code-generic.lua

@@ -156,12 +156,16 @@ return {
                 ui = {
                     -- kind = require("config.util").icons.kind_lspsaga,
                     kind = require("catppuccin.groups.integrations.lsp_saga").custom_kind(),
+                    devicon = true,
+                    title = true,
                 },
-                implement = { enabled = true },
+                implement = {
-                symbol_in_winbar = {
                     enable = true,
-                    hide_keyword = true,
+                    virtual_text = true,
+                    sign = true,
+                    priority = 100,
                 },
+                symbol_in_winbar = { enable = true, hide_keyword = true },
                 lightbulb = { virtual_text = false },
                 outline = { auto_preview = false },
             })

common/.config/nvim/lua/plugins/code-lsp.lua

@@ -94,33 +94,38 @@ return {
                                 postfix = { enable = true },
                                 autoimport = { enable = true },
                             },
-                        },
+                            lens = {
-                        inlayHints = {
-                            bindingModeHints = { enable = false },
-                            chainingHints = { enable = true },
-                            closingBraceHints = { enable = true, minLines = 25 },
-                            closureReturnTypeHints = { enable = "never" },
-                            lifetimeElisionHints = { enable = "never", useParameterNames = false },
-                            maxLength = 25,
-                            parameterHints = { enable = true },
-                            reborrowHints = { enable = "never" },
-                            renderColons = true,
-                            typeHints = {
                                 enable = true,
-                                hideClosureInitialization = false,
+                                implementations = { enable = true },
-                                hideNamedConstructor = false,
+                                run = { enable = false },
                             },
-                        },
+                            inlayHints = {
-                        procMacro = {
+                                bindingModeHints = { enable = false },
-                            enable = true,
+                                chainingHints = { enable = true },
-                            ignored = {
+                                closingBraceHints = { enable = true, minLines = 25 },
-                                ["async-trait"] = { "async_trait" },
+                                closureReturnTypeHints = { enable = "never" },
-                                ["napi-derive"] = { "napi" },
+                                lifetimeElisionHints = { enable = "never", useParameterNames = false },
-                                ["async-recursion"] = { "async_recursion" },
+                                maxLength = 25,
+                                parameterHints = { enable = true },
+                                reborrowHints = { enable = "never" },
+                                renderColons = true,
+                                typeHints = {
+                                    enable = true,
+                                    hideClosureInitialization = false,
+                                    hideNamedConstructor = false,
+                                },
+                            },
+                            procMacro = {
+                                enable = true,
+                                ignored = {
+                                    ["async-trait"] = { "async_trait" },
+                                    ["napi-derive"] = { "napi" },
+                                    ["async-recursion"] = { "async_recursion" },
+                                },
+                            },
+                            files = {
+                                excludeDirs = { ".direnv", ".git", ".github", ".gitlab", "bin", "node_modules", "target", "venv", ".venv" },
                             },
-                        },
-                        files = {
-                            excludeDirs = { ".direnv", ".git", ".github", ".gitlab", "bin", "node_modules", "target", "venv", ".venv" },
                         },
                     },
                 },