refactor(nvim): 完整重写配置，支持 Go/Rust/Python/TypeScript 开发

- 架构重构：新增 plugins/lang/ 子目录，按语言拆分配置
- 补全引擎：nvim-cmp → blink.cmp + LuaSnip
- 文件浏览：新增 neo-tree（<Space>e）
- 语言支持：
  - Go: ray-x/go.nvim + dap-go + neotest-go
  - Rust: rustaceanvim + crates.nvim
  - Python: venv-selector + dap-python + neotest-python
  - TypeScript: typescript-tools.nvim（替换 ts_ls）
- LSP: lazydev + mason + mason-lspconfig + fidget + inc-rename
- 格式化: conform.nvim（lsp_format fallback，保存时自动格式化）
- Lint: nvim-lint（selene 替换 luacheck，Mason 可直接安装）
- UI: snacks.nvim（dashboard+notifier+picker）+ noice + lualine + bufferline
- 编辑增强: mini.ai + mini.surround + grug-far + flash + ufo + trouble v3
- 删除废弃文件: cmp/coding/null-ls/mason/lspconfig/go/python 等旧文件
- 修复: Neovim 0.12 treesitter query 校验报错（noice routes 过滤）
- 新增: NVIM_GUIDE.md 快捷键使用手册

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

nvim/lua/plugins/treesitter.lua

@@ -1,13 +1,81 @@
 -- treesitter.lua - 语法高亮与代码结构
+
 return {
   {
     "nvim-treesitter/nvim-treesitter",
     build = ":TSUpdate",
-    event = { "BufReadPost", "BufNewFile" },
+    event = { "BufReadPost", "BufNewFile", "BufWritePre", "VeryLazy" },
+    dependencies = {
+      "nvim-treesitter/nvim-treesitter-textobjects",
+    },
     opts = {
-      ensure_installed = { "go", "python", "lua", "json", "yaml", "markdown" },
+      ensure_installed = {
+        -- "comment" 已在新版 nvim-treesitter 中弃用，避免 query 校验错误
+        "bash", "c", "cmake", "css", "diff", "dockerfile",
+        "git_config", "git_rebase", "gitcommit", "gitignore",
+        "go", "gomod", "gosum", "gowork",
+        "html", "javascript", "jsdoc", "json", "jsonc",
+        "lua", "luadoc", "luap", "make", "markdown", "markdown_inline",
+        "python", "regex", "rst", "rust", "sql", "toml",
+        "tsx", "typescript", "vim", "vimdoc", "xml", "yaml",
+      },
       highlight = { enable = true },
       indent = { enable = true },
+      incremental_selection = {
+        enable = true,
+        keymaps = {
+          init_selection = "<C-space>",
+          node_incremental = "<C-space>",
+          scope_incremental = false,
+          node_decremental = "<bs>",
+        },
+      },
+      textobjects = {
+        select = {
+          enable = true,
+          lookahead = true,
+          keymaps = {
+            ["af"] = "@function.outer",
+            ["if"] = "@function.inner",
+            ["ac"] = "@class.outer",
+            ["ic"] = "@class.inner",
+            ["aa"] = "@parameter.outer",
+            ["ia"] = "@parameter.inner",
+            ["ab"] = "@block.outer",
+            ["ib"] = "@block.inner",
+          },
+        },
+        move = {
+          enable = true,
+          set_jumps = true,
+          goto_next_start = {
+            ["]f"] = "@function.outer",
+            ["]c"] = "@class.outer",
+          },
+          goto_next_end = {
+            ["]F"] = "@function.outer",
+            ["]C"] = "@class.outer",
+          },
+          goto_previous_start = {
+            ["[f"] = "@function.outer",
+            ["[c"] = "@class.outer",
+          },
+          goto_previous_end = {
+            ["[F"] = "@function.outer",
+            ["[C"] = "@class.outer",
+          },
+        },
+      },
     },
+    config = function(_, opts)
+      -- nvim-treesitter v1+ 重构后移除了 configs 子模块，需要兼容两种 API
+      local ok, configs = pcall(require, "nvim-treesitter.configs")
+      if ok then
+        configs.setup(opts)
+      else
+        -- 新版 API：直接调用顶层模块
+        require("nvim-treesitter").setup(opts)
+      end
+    end,
   },
 }