Checkpoint web parity through Chromium input tasks

docs/status/M14-04E.md

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+# M14-04E Status
+
+status: done  
+task: Chromium US/non-US/dead-key/modifier keymap fixture  
+updated: 2026-08-19 America/New_York  
+enablingTask: false  
+parityStateChange: false
+
+## Scope
+
+Added a versioned keyboard observation contract preserving layout character (`key`), physical key
+(`code`), location, repeat, composition state, dead-key identity and modifier flags. Chromium
+production events verified US, non-US character, dead-key and modifier fixtures. Firefox/WebKit are
+excluded.
+
+## Evidence
+
+- `npm --prefix web run build` passed.
+- `npm --prefix web run test:chromium-keymap-fixture` passed: 2 protocol tests and 4 real Chromium
+  keyboard fixtures.
+- Checker output: `chromium-keymap-ok fixtures=US,NON_US,DEAD_KEY,MODIFIER observations=4 execution=DISABLED next=M14-04F`.
+- `npm --prefix web run typecheck` and `git diff --check` passed.
+
+## Next Task
+
+`M14-04F`: Chromium touch modal cancel, two-finger navigation and single pen Main commit.