brand: document searchi identity and add reusable logo masters

docs/VALIDATION.md

@@ -3,6 +3,26 @@
 Development host: Windows VM, x86_64 MSVC, Rust stable 1.99.0.
 All local tests run on CPU; no GPU provider is configured.
 
+## Current integration checkpoint (2026-10-12)
+
+- `cargo test --workspace --locked`: 39 default tests passed. Four asset-dependent
+  or explicit benchmark tests remain opt-in; a default pass does not run them.
+- Native desktop tests: 7 passed with SEARCHI_FORCE_CPU=1 and WebView2 GPU disabled.
+- Frontend: 7 async-state tests passed, Prettier passed, TypeScript/Vite build passed.
+- Genuine Google CPU reference/window test passed separately: five DigUp reference
+  vectors had cosine similarity above 0.999; actual multilingual retrieval and
+  tokenizer tail-window coverage passed. MiniLM evidence below is historical.
+- Repository description/topics were read back after update; the branded avatar
+  upload returned HTTP 204 and the repository API returned its avatar URL.
+- New desktop styling is in progress. `design-qa.md` records the visual gate as
+  blocked because browser bootstrap and native screen capture are unavailable.
+  No visual match or complete UI interaction verification is claimed.
+
+The active parallel development branches of work may add tests or change counts
+after this checkpoint. Run the documented checks again after integration.
+
+## Historical foundation evidence
+
 Initial foundation checks (2026-10-12):
 - `cargo test --workspace`: CLI parser/executable checks and engine retrieval,
   lifecycle, exclusions, filters, migration and concurrent-reader checks passed.