Docs: README rewritten in the creator's voice (why it was built, generic comparison, free + open, real build-from-source steps incl. ffmpeg fetch + own OAuth client); source offer URL llgit.llamachile.tube/gramps/LlamaCasty in README + notices; TASK 51 keeps the strength slider (Unit: README + source offer)

ai.md

@@ -1673,8 +1673,9 @@ what keeps the merch brand protected). The scene backgrounds + default alert vid
 **placeholders** (creator: made "with the intent of individual creators to immediately replace with
 their own images") — they go out under the GPL with the code, no reservation. `LICENSE` + `ADDITIONAL-TERMS.md` ship beside the exe
 (csproj `None` items); the About panel shows `THIRD-PARTY-NOTICES.txt`, whose header carries the
-LlamaCasty license notice (GPL §5(d) "Appropriate Legal Notices"). **Source offer (§6):** the public
-repo URL — add it to the notices header + README the day the repo goes public.
+LlamaCasty license notice (GPL §5(d) "Appropriate Legal Notices"). **Source offer (§6):**
+`https://llgit.llamachile.tube/gramps/LlamaCasty` (the Gitea repo; creator toggles it public — the
+old `gramps/ytLlive` path 301-redirects there), recorded in the notices header + README.
 
 Every bundled component must stay GPL-3.0-compatible (MIT/BSD/Apache-2.0/LGPL/public domain all are;
 **GPL-2.0-only and proprietary are not**; Apache-2.0 is fine with GPL-3 but NOT with GPL-2). The