feat(nvim): add LaTeX workflow; tweak Hyprland master; refresh CS autoexec; add GTK bookmark

Neovim (LaTeX):
- Add TeX ftplugin: spell (en_US,de_DE), soft-wrap + linebreak, conceal=2, no hard wrap
- Add plugins: vimtex (zathura; latexmk with LuaLaTeX + shell-escape),
  LTeX language server via astrolsp + ltex_extra (check on save; motherTongue=de-DE),
  blink.cmp integration (cmp-vimtex, cmp-latex-symbols → insert macros),
  LuaSnip LaTeX snippets, Treesitter “latex”, nabla.nvim (inline/popup math; <leader>mp/<leader>mv)

Hyprland:
- Set master.orientation=left; comment out center_master_* options

Counter-Strike autoexec:
- Rebind +lookatweapon → MOUSE5; map R → lastinv; radio on Y/U/I/H; J → +radialradio
- Crosshair tweaks: size 2.5, gap -3, no outline, alpha off
- Mouse: sensitivity 0.619; zoom_sensitivity_ratio 1.0
- Viewmodel: offset_x -2; cl_prefer_lefthanded 0
- Video/perf: gamma 1.6; set fps_max/fps_max_ui 0; drop legacy perf/network cvars (mat_queue_mode, cl_forcepreload, rate/interp*)
- HUD cleanup: disable target ID; remove +cl_show_team_equipment

GTK:
- Add bookmark: Documents/ttrpg/dsa5

.config/nvim/lua/plugins/blink-latex.lua

@@ -0,0 +1,39 @@
+return {
+  -- Let blink.cmp consume nvim-cmp sources
+  { "saghen/blink.compat", version = "2.*", lazy = true, opts = {} },
+
+  -- Add vimtex + latex symbol sources to blink.cmp
+  {
+    "Saghen/blink.cmp",
+    optional = true,
+    dependencies = {
+      "micangl/cmp-vimtex", -- environments, \cite, \ref, etc. via vimtex
+      "kdheepak/cmp-latex-symbols", -- math symbols via LaTeX macros
+    },
+    opts = function(_, opts)
+      opts.sources = opts.sources or {}
+      opts.sources.providers = opts.sources.providers or {}
+      opts.sources.default = opts.sources.default or { "lsp", "path", "snippets", "buffer" }
+
+      -- Only turn on the LaTeX sources for TeX filetypes
+      opts.sources.per_filetype = vim.tbl_deep_extend("force", opts.sources.per_filetype or {}, {
+        tex = { inherit_defaults = true, "vimtex", "latex_symbols" },
+        plaintex = { inherit_defaults = true, "vimtex", "latex_symbols" },
+      })
+
+      -- Expose nvim-cmp sources to blink via blink.compat
+      opts.sources.providers.vimtex = {
+        name = "vimtex",
+        module = "blink.compat.source",
+      }
+      opts.sources.providers.latex_symbols = {
+        name = "latex_symbols",
+        module = "blink.compat.source",
+        -- Insert LaTeX commands (e.g. \alpha) instead of Unicode characters:
+        opts = { strategy = 2 }, -- documented in cmp-latex-symbols README
+        score_offset = -2, -- keep it below LSP/snippets in relevance
+      }
+      return opts
+    end,
+  },
+}