feat(plugins): add codediff, tv, vellum plugins and drop overseer support

lua/plugins/astrocore.lua

@@ -375,10 +375,6 @@ return {
           function() require("config.templates").pick() end,
           desc = "Find templates",
         },
-        -- NOTE: <C-m> and <CR> are likewise the same key, so Enter in normal
-        -- mode runs overseer. Buffers with their own <CR> (quickfix, help,
-        -- neo-tree, overseer's task list) keep theirs via buffer-local maps.
-        ["<C-m>"] = { "<Cmd>OverseerRun<CR>", desc = "Run overseer task" },
         ["<C-f>w"] = {
           function() require("fff").live_grep() end,
           desc = "Live grep",

lua/plugins/codediff.lua

@@ -0,0 +1,13 @@
+--- codediff.nvim: VSCode-style diff review workspace (explorer + side-by-side)
+--- `:CodeDiff` reviews the working tree; `q` closes the review tab.
+--- @module plugins.codediff
+
+---@type LazySpec
+return {
+  "esmuellert/codediff.nvim",
+  cmd = "CodeDiff",
+  keys = {
+    { "<C-g><C-d>", "<Cmd>CodeDiff<CR>", desc = "Review changes (CodeDiff)" },
+  },
+  opts = {},
+}

lua/plugins/overseer.lua

@@ -1,23 +0,0 @@
---- overseer.nvim: task output in a Snacks bottom window
----
---- The astrocommunity pack (community.lua) owns the plugin spec and the
---- <Leader>M* maps; this layers the `snacks_output` component
---- (lua/overseer/component/snacks_output.lua) onto the default component
---- set so every task shows its terminal buffer in a 24-row window docked at
---- the bottom. <C-m> / Enter runs a task, see plugins/astrocore.lua.
---- @module plugins.overseer
-
-return {
-  "stevearc/overseer.nvim",
-  ---@type overseer.SetupOpts
-  opts = {
-    component_aliases = {
-      default = {
-        "on_exit_set_status",
-        "on_complete_notify",
-        { "on_complete_dispose", require_view = { "SUCCESS", "FAILURE" } },
-        { "snacks_output", height = 24 },
-      },
-    },
-  },
-}

lua/plugins/pane-nav.lua

@@ -20,9 +20,11 @@ return {
   "AstroNvim/astrocore",
   opts = function(_, opts)
     local maps = opts.mappings
+    maps.x = maps.x or {}
     for key, dir in pairs(moves) do
       local desc = ("Move %s a split (%s aware)"):format(dir, nav.env())
       maps.n[key] = { function() nav.navigate(dir) end, desc = desc }
+      maps.x[key] = maps.n[key]
       maps.t[key] = { nav.terminal(dir), desc = desc }
     end
   end,

lua/plugins/tv.lua

@@ -0,0 +1,45 @@
+--- tv.nvim: television channels in a floating terminal
+--- <C-t> picks from the file/editor cable channels in the dotfiles
+--- (~/.config/television/cable) only. Their cable `enter` actions would spawn
+--- an editor inside the float, so each gets Neovim-side handlers: tv.nvim
+--- passes handler keys as `--expect`, which wins over cable keybindings.
+--- `:Tv <channel>` still reaches any channel.
+--- @module plugins.tv
+
+local OPEN = { "files", "git-files", "recent-files", "dotfiles", "git-diff" }
+local GREP = { "text", "todo-comments" }
+
+---@type LazySpec
+return {
+  "alexpasmantier/tv.nvim",
+  cmd = "Tv",
+  keys = {
+    {
+      "<C-t>",
+      function()
+        vim.ui.select(vim.list_extend(vim.list_extend({}, OPEN), GREP), { prompt = "Television" }, function(choice)
+          if choice then require("tv").tv_channel(choice) end
+        end)
+      end,
+      desc = "Television file channels",
+    },
+  },
+  config = function()
+    local h = require("tv").handlers
+    local channels = {}
+    -- no <C-s>/<C-x>: tv uses them for cycle_sources / the action picker
+    for _, name in ipairs(OPEN) do
+      channels[name] = {
+        handlers = { ["<CR>"] = h.open_as_files, ["<C-q>"] = h.send_to_quickfix, ["<C-v>"] = h.open_in_vsplit },
+      }
+    end
+    for _, name in ipairs(GREP) do
+      channels[name] = { handlers = { ["<CR>"] = h.open_at_line, ["<C-q>"] = h.send_to_quickfix } }
+    end
+
+    require("tv").setup {
+      global_keybindings = { channels = false }, -- <C-t> lives in `keys` above
+      channels = channels,
+    }
+  end,
+}

lua/plugins/vellum.lua

@@ -0,0 +1,19 @@
+--- vellum.nvim: live GitHub-markdown preview in a split, mermaid/math as images
+--- `:Vellum` toggles it, `:Vellum export [file.pdf|file.html]` exports.
+---
+--- Runs from the prdlk fork's `mdx` branch until blackhat-7/vellum.nvim#4
+--- merges: upstream only accepts filetype `markdown`, so `markdown.mdx`
+--- buffers could not export, take over the preview or be followed by links,
+--- and their import/export lines and {/* comments */} rendered as text.
+--- @module plugins.vellum
+
+---@type LazySpec
+return {
+  "prdlk/vellum.nvim",
+  branch = "mdx",
+  -- `markdown.mdx` is the mdx pack's filetype; a dotted filetype only matches
+  -- a pattern that spells it out
+  ft = { "markdown", "markdown.mdx" },
+  cmd = "Vellum",
+  opts = {},
+}