fix(conflict): notify on navigation wrap-around

Problem: goto_next and goto_prev wrapped silently when reaching the
last or first conflict, giving no indication to the user.

Solution: add vim.notify before the wrap-around jump in both functions.

lua/diffs/conflict.lua

@@ -323,6 +323,7 @@ function M.goto_next(bufnr)
       return
     end
   end
+  vim.notify('[diffs.nvim]: wrapped to first conflict', vim.log.levels.INFO)
   vim.api.nvim_win_set_cursor(0, { regions[1].marker_ours + 1, 0 })
 end
 
@@ -340,6 +341,7 @@ function M.goto_prev(bufnr)
       return
     end
   end
+  vim.notify('[diffs.nvim]: wrapped to last conflict', vim.log.levels.INFO)
   vim.api.nvim_win_set_cursor(0, { regions[#regions].marker_ours + 1, 0 })
 end
 

spec/conflict_spec.lua

@@ -531,6 +531,33 @@ describe('conflict', function()
       helpers.delete_buffer(bufnr)
     end)
 
+    it('goto_next notifies on wrap-around', function()
+      local bufnr = create_file_buffer({
+        '<<<<<<< HEAD',
+        'a',
+        '=======',
+        'b',
+        '>>>>>>> feat',
+      })
+      vim.api.nvim_set_current_buf(bufnr)
+      vim.api.nvim_win_set_cursor(0, { 5, 0 })
+
+      local notified = false
+      local orig_notify = vim.notify
+      vim.notify = function(msg)
+        if msg:match('wrapped to first conflict') then
+          notified = true
+        end
+      end
+
+      conflict.goto_next(bufnr)
+      vim.notify = orig_notify
+
+      assert.is_true(notified)
+
+      helpers.delete_buffer(bufnr)
+    end)
+
     it('goto_prev jumps to previous conflict', function()
       local bufnr = create_file_buffer({
         '<<<<<<< HEAD',
@@ -575,6 +602,33 @@ describe('conflict', function()
       helpers.delete_buffer(bufnr)
     end)
 
+    it('goto_prev notifies on wrap-around', function()
+      local bufnr = create_file_buffer({
+        '<<<<<<< HEAD',
+        'a',
+        '=======',
+        'b',
+        '>>>>>>> feat',
+      })
+      vim.api.nvim_set_current_buf(bufnr)
+      vim.api.nvim_win_set_cursor(0, { 1, 0 })
+
+      local notified = false
+      local orig_notify = vim.notify
+      vim.notify = function(msg)
+        if msg:match('wrapped to last conflict') then
+          notified = true
+        end
+      end
+
+      conflict.goto_prev(bufnr)
+      vim.notify = orig_notify
+
+      assert.is_true(notified)
+
+      helpers.delete_buffer(bufnr)
+    end)
+
     it('goto_next does nothing with no conflicts', function()
       local bufnr = create_file_buffer({ 'normal line' })
       vim.api.nvim_set_current_buf(bufnr)