fix(submit): use file path over stdin; fix CF CodeMirror textarea (#305)

## Problem

After the initial submit hardening, two issues remained: source code was
read in Lua and piped as stdin to the scraper (unnecessary roundtrip
since
the file exists on disk), and CF's `page.fill()` timed out on the hidden
`textarea[name="source"]` because CodeMirror owns the editor state.

## Solution

Pass the source file path as a CLI arg instead — AtCoder calls
`page.set_input_files(file_path)` directly, CF reads it with
`Path(file_path).read_text()`. Fix CF source injection via
`page.evaluate()`
into the CodeMirror instance. Extract `BROWSER_SUBMIT_NAV_TIMEOUT` as a
per-platform `defaultdict` (CF defaults to 2× nav timeout). Save the
buffer
with `vim.cmd.update()` before submitting.

lua/cp/commands/cache.lua

@@ -47,26 +47,30 @@ function M.handle_cache_command(cmd)
             constants.PLATFORM_DISPLAY_NAMES[cmd.platform],
             cmd.contest
           ),
-          vim.log.levels.INFO,
-          true
+          { level = vim.log.levels.INFO, override = true }
         )
       else
-        logger.log(("Unknown platform '%s'."):format(cmd.platform), vim.log.levels.ERROR)
+        logger.log(
+          ("Unknown platform '%s'."):format(cmd.platform),
+          { level = vim.log.levels.ERROR }
+        )
       end
     elseif cmd.platform then
       if vim.tbl_contains(platforms, cmd.platform) then
         cache.clear_platform(cmd.platform)
         logger.log(
           ("Cache cleared for platform '%s'"):format(constants.PLATFORM_DISPLAY_NAMES[cmd.platform]),
-          vim.log.levels.INFO,
-          true
+          { level = vim.log.levels.INFO, override = true }
         )
       else
-        logger.log(("Unknown platform '%s'."):format(cmd.platform), vim.log.levels.ERROR)
+        logger.log(
+          ("Unknown platform '%s'."):format(cmd.platform),
+          { level = vim.log.levels.ERROR }
+        )
       end
     else
       cache.clear_all()
-      logger.log('Cache cleared', vim.log.levels.INFO, true)
+      logger.log('Cache cleared', { level = vim.log.levels.INFO, override = true })
     end
   end
 end

lua/cp/commands/init.lua

@@ -83,8 +83,6 @@ local function parse_command(args)
       else
         return { type = 'action', action = 'interact' }
       end
-    elseif first == 'login' or first == 'logout' then
-      return { type = 'action', action = first, platform = args[2] }
     elseif first == 'stress' then
       return {
         type = 'action',
@@ -245,6 +243,9 @@ local function parse_command(args)
         message = 'Too few arguments - specify a contest.',
       }
     elseif #args == 2 then
+      if args[2] == 'login' or args[2] == 'logout' then
+        return { type = 'action', action = args[2], platform = first }
+      end
       return {
         type = 'contest_setup',
         platform = first,
@@ -287,7 +288,7 @@ function M.handle_command(opts)
   local cmd = parse_command(opts.fargs)
 
   if cmd.type == 'error' then
-    logger.log(cmd.message, vim.log.levels.ERROR)
+    logger.log(cmd.message, { level = vim.log.levels.ERROR })
     return
   end
 
@@ -336,7 +337,7 @@ function M.handle_command(opts)
     local problem_id = cmd.problem_id
 
     if not (platform and contest_id) then
-      logger.log('No contest is currently active.', vim.log.levels.ERROR)
+      logger.log('No contest is currently active.', { level = vim.log.levels.ERROR })
       return
     end
 
@@ -351,7 +352,7 @@ function M.handle_command(opts)
           contest_id,
           problem_id
         ),
-        vim.log.levels.ERROR
+        { level = vim.log.levels.ERROR }
       )
       return
     end

lua/cp/commands/picker.lua

@@ -12,7 +12,7 @@ function M.handle_pick_action(language)
   if not (config.ui and config.ui.picker) then
     logger.log(
       'No picker configured. Set ui.picker = "{telescope,fzf-lua}" in your config.',
-      vim.log.levels.ERROR
+      { level = vim.log.levels.ERROR }
     )
     return
   end
@@ -25,13 +25,13 @@ function M.handle_pick_action(language)
     if not ok then
       logger.log(
         'telescope.nvim is not available. Install telescope.nvim xor change your picker config.',
-        vim.log.levels.ERROR
+        { level = vim.log.levels.ERROR }
       )
       return
     end
     local ok_cp, telescope_picker = pcall(require, 'cp.pickers.telescope')
     if not ok_cp then
-      logger.log('Failed to load telescope integration.', vim.log.levels.ERROR)
+      logger.log('Failed to load telescope integration.', { level = vim.log.levels.ERROR })
       return
     end
 
@@ -41,13 +41,13 @@ function M.handle_pick_action(language)
     if not ok then
       logger.log(
         'fzf-lua is not available. Install fzf-lua or change your picker config',
-        vim.log.levels.ERROR
+        { level = vim.log.levels.ERROR }
       )
       return
     end
     local ok_cp, fzf_picker = pcall(require, 'cp.pickers.fzf_lua')
     if not ok_cp then
-      logger.log('Failed to load fzf-lua integration.', vim.log.levels.ERROR)
+      logger.log('Failed to load fzf-lua integration.', { level = vim.log.levels.ERROR })
       return
     end