nvim,tmux,kitty: full config overhaul (AstroNvim → native 0.12)

Replaces AstroNvim v5 with from-scratch Neovim 0.12 config using
vim.lsp.config()/vim.lsp.enable() natively, lazy.nvim, blink.cmp,
and smart-splits tmux integration.

tmux: new C-Space prefix, hjkl pane nav, resize key table, tpm plugins.
kitty: add allow_remote_control for smart-splits.

dot_config/nvim/lua/plugins/dap/rust.lua

@@ -0,0 +1,43 @@
+local M = {}
+
+local function setup()
+  local dap = require("dap")
+  local mason_path = vim.fn.stdpath("data") .. "/mason/packages/codelldb"
+
+  dap.adapters.codelldb = {
+    type = "server",
+    port = "${port}",
+    executable = {
+      command = mason_path .. "/extension/adapter/codelldb",
+      args = { "--port", "${port}" },
+    },
+  }
+
+  dap.configurations.rust = {
+    {
+      name = "Launch (Rust)",
+      type = "codelldb",
+      request = "launch",
+      program = function()
+        return vim.fn.input("Path to executable: ", vim.fn.getcwd() .. "/target/debug/", "file")
+      end,
+      cwd = "${workspaceFolder}",
+      stopOnEntry = false,
+      args = {},
+    },
+    {
+      name = "Launch Tauri (Rust)",
+      type = "codelldb",
+      request = "launch",
+      program = function()
+        return vim.fn.input("Path to executable: ", vim.fn.getcwd() .. "/src-tauri/target/debug/", "file")
+      end,
+      cwd = "${workspaceFolder}/src-tauri",
+      stopOnEntry = false,
+      args = {},
+    },
+  }
+end
+
+setup()
+return M