refactor(git): keep routine success output out of :messages

lua/git/cmd.lua

@@ -238,7 +238,7 @@ local function run_to_messages(r, args)
         )
     end
     if #chunks > 0 then
-        vim.api.nvim_echo(chunks, true, {})
+        vim.api.nvim_echo(chunks, failed or err ~= "", {})
     end
 end
 

lua/git/commit.lua

@@ -72,7 +72,7 @@ function M.commit(opts)
         end
         local out = vim.trim(result.stdout or "")
         if out ~= "" then
-            util.info("%s", out)
+            vim.api.nvim_echo({ { out } }, false, {})
         end
     end)
 end

test/git/cmd_test.lua

@@ -509,6 +509,41 @@ local function has_status(calls, status)
     return false
 end
 
+---@param calls { history: boolean }[]
+---@return boolean
+local function any_history(calls)
+    for _, c in ipairs(calls) do
+        if c.history then
+            return true
+        end
+    end
+    return false
+end
+
+t.test("quiet :G success does not add to :messages history", function()
+    make_repo({ a = "x" })
+    with_echo_stub(function(calls)
+        cmd.run({ "config", "user.email" })
+        t.falsy(any_history(calls), "success path must not write history")
+    end)
+end)
+
+t.test("quiet :G silent failure adds 'git exited N' to history", function()
+    make_repo({ a = "x" })
+    with_echo_stub(function(calls)
+        cmd.run({ "config", "--get", "nonexistent.foo.bar" })
+        t.truthy(any_history(calls), "failure path must write history")
+    end)
+end)
+
+t.test("quiet :G stderr failure adds error to history", function()
+    make_repo({ a = "x" })
+    with_echo_stub(function(calls)
+        cmd.run({ "branch", "-d", "nonexistent-branch" })
+        t.truthy(any_history(calls), "failure path must write history")
+    end)
+end)
+
 t.test("streaming :G fetch (no bang) does not open a window", function()
     make_repo({ a = "x" })
     with_echo_stub(function(calls)