fix(install): simplify to the direct /releases/download/latest/ URL

Gitea serves the most recent release under the `latest` tag segment, so
`/releases/download/latest/nuwiki-ls-<target>.tar.gz` resolves directly
(HTTP 200) — no API lookup or JSON parsing needed. Drop the
latest_asset_url helpers added in the previous fix; the only real bug was
the URL shape (`/releases/latest/download/` is GitHub-only and 404s on
Gitea). Both install paths now just pick the target and build the URL.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

lua/nuwiki/install.lua

@@ -66,28 +66,6 @@ local function build_from_source(dest)
   return vim.fn.executable(dest) == 1
 end
 
--- Gitea API base for this repo. Gitea has no GitHub-style
--- `/releases/latest/download/<asset>` shortcut, so resolve the asset's real
--- download URL (`browser_download_url`) through the API instead.
-local REPO_API = 'https://code.gfran.co/api/v1/repos/gffranco/nuwiki'
-
-local function latest_asset_url(asset_name)
-  local body = vim.fn.system({ 'curl', '-fsSL', REPO_API .. '/releases/latest' })
-  if vim.v.shell_error ~= 0 then
-    return nil
-  end
-  local ok, release = pcall(vim.json.decode, body)
-  if not ok or type(release) ~= 'table' or type(release.assets) ~= 'table' then
-    return nil
-  end
-  for _, a in ipairs(release.assets) do
-    if a.name == asset_name then
-      return a.browser_download_url
-    end
-  end
-  return nil
-end
-
 local function download_release(dest)
   local target = target_triple()
   if not target then
@@ -96,10 +74,13 @@ local function download_release(dest)
   if vim.fn.executable('curl') ~= 1 or vim.fn.executable('tar') ~= 1 then
     return false
   end
-  local url = latest_asset_url('nuwiki-ls-' .. target .. '.tar.gz')
-  if not url then
-    return false
-  end
+  -- Gitea serves the most recent release under the `latest` tag segment
+  -- (`/releases/download/latest/<asset>`). Note this is NOT GitHub's
+  -- `/releases/latest/download/<asset>` shape, which Gitea 404s.
+  local url = string.format(
+    'https://code.gfran.co/gffranco/nuwiki/releases/download/latest/nuwiki-ls-%s.tar.gz',
+    target
+  )
   local archive = vim.fn.tempname() .. '.tar.gz'
   vim.fn.system({ 'curl', '-fsSL', '-o', archive, url })
   if vim.v.shell_error ~= 0 then