T19 Git: diffs unified and split with word marks and folds, three-way merge and conflict resolver, changes list and commit input, commit graph and list, branch selector, branch, tag and stash lists, blame with annotation, file history, pull request card, review thread, diff stat and status badge

TASKS.md

@@ -242,3 +242,4 @@ Per-component lines live in `tasks/`. Tags there:
 | T18 | 1 | FAIL | a missing folder ran in the app's own; combining marks dropped; Tab skipped the terminal; its wheel scrolled the page too; clear kept find matches; New bash reused the old shell; the dark script typed into the replay |
 | T18 | 2 | FAIL | a folder it could not enter still started the shell elsewhere; links read cluster cells as spaces |
 | T18 | 3 | PASS | |
+| T19 | 1 | — | pending review |