fix(tty): filter terminal probes by channel #40356

Problem:
Terminal probes sent with `nvim_ui_send()` can reach more than one stdout TTY
UI. Probes with a known TTY UI owner should not accept `TermResponse`s from
unrelated UI channels. 

Solution:
Thread the existing `chan` filter through owned terminal probes. This covers
startup/attach background detection, fallback truecolor detection, and
`vim.tty.query()` forwarding opts to `vim.tty.request()`.

Note: Not every terminal escape path is updated here. I only passed `chan` when
the caller already knows which TTY UI owns the probe. For example, this does
not include:
- (Followup) OSC 52 (system clipboard) detection. It needs to capture the
  `UIEnter` channel. Adding `{ chan = ... }` only to the nested query would be
  half a fix.
- OSC 52 _paste_ is left global because the provider callback does not have
  a UI channel (paste is invoked without a ui channel/tty ui object).

runtime/lua/vim/ui/img.lua

@@ -137,7 +137,7 @@ end
 --- Query whether the host terminal supports displaying images.
 --- Blocks until the terminal responds or times out.
 ---
----@param opts? {timeout?: integer} timeout in milliseconds (default: 1000)
+---@param opts? {timeout?: integer, chan?: integer} timeout in milliseconds (default: 1000)
 ---@return boolean supported true if the terminal supports image display
 ---@return string? msg error detail if the terminal responded but not with OK
 function M._supported(opts)

runtime/lua/vim/ui/img/_kitty.lua

@@ -160,11 +160,12 @@ end
 --- Query whether this terminal supports the kitty graphics protocol.
 --- Blocks until the terminal responds or times out.
 ---
----@param opts? {timeout?: integer} timeout in milliseconds (default: 1000)
+---@param opts? {timeout?: integer, chan?: integer} timeout in milliseconds (default: 1000)
 ---@return boolean supported
 ---@return string? msg error detail if terminal responded but not with OK
 function M.supported(opts)
-  local timeout = opts and opts.timeout or 1000
+  opts = opts or {}
+  local timeout = opts.timeout or 1000
 
   -- Do not use APC on terminals that echo unknown sequences
   if vim.env.TERM_PROGRAM == 'Apple_Terminal' then
@@ -180,7 +181,7 @@ function M.supported(opts)
 
   vim.tty.query_apc(
     seq({ a = 'q', i = query_id, s = 1, v = 1 }),
-    { timeout = timeout },
+    { timeout = timeout, chan = opts.chan },
     function(resp)
       -- kitty APC response: \027_G[<fields>,]i=<id>[,<fields>];<status>
       -- status is "OK" or an error code+message like "ENODATA:Missing image data"