fix(chat): reinsert stickies before prompt processing (#1472)

This change ensures that sticky messages are properly reinserted before
processing the prompt, preserving their context in the chat flow. The
previous logic for removing sticky prefixes was removed, and stickies
are now stored correctly after resolution.

Closes #1471

Signed-off-by: Tomas Slusny <slusnucky@gmail.com>

Author: deathbeam

lua/CopilotChat/init.lua

@@ -404,6 +404,7 @@ function M.ask(prompt, config)
   -- Resolve prompt after window is opened
   prompt = process_sticky(prompt, config)
   prompt = vim.trim(prompt)
+  prompt = table.concat(M.chat:get_sticky(), '\n') .. '\n\n' .. prompt
 
   -- After opening window we need to schedule to next cycle so everything properly resolves
   schedule(function()
@@ -420,15 +421,7 @@ function M.ask(prompt, config)
       local resolved_resources, resolved_tools, resolved_stickies, prompt = prompts.resolve_functions(prompt, config)
       local selected_model, prompt = prompts.resolve_model(prompt, config)
 
-      -- Remove sticky prefix
-      prompt = table.concat(
-        vim.tbl_map(function(l)
-          return l:gsub('^>%s+', '')
-        end, vim.split(prompt, '\n')),
-        '\n'
-      )
-
-      -- Add resolved stickies to chat
+      -- Store resolved stickies to chat
       local current_sticky = M.chat:get_sticky()
       for _, sticky in ipairs(resolved_stickies) do
         table.insert(current_sticky, sticky)