feat(ts): collect into and iterate a crate's own collections through std's adaptors

quest/m2/ts-model/README.md

@@ -45,7 +45,7 @@ Decided with the maintainer on 2026-10-27, from a census of the model's 22 publi
 - The end-to-end work stays here: the model's roots, its differential harness, and the
   `frames.ts` workload. moq writes the binding files `model.toml` names, in its own tree.
 
-The census at the pin on 2026-11-04: 69 refusals. `Timestamp` alone refuses nothing, and
+The census at the pin on 2026-11-04: 82 refusals. `Timestamp` alone refuses nothing, and
 the [model fixture](/ts/README.md#tests)'s harness runs it against native moq-net at the
 pin; each case it adds as a type translates. Every other root reaches the rest of the
 model, so each child below unblocks all of them together. The rest is moq's, for its
@@ -57,7 +57,6 @@ there, as does the `unsafe` slice of `model/frame.rs`'s `Filled`.
 
 ## Required
 
-- [Iterators into a crate's own collections](/quest/m2/ts-model/from-iterator.md) - `collect`, `flat_map`, and `flatten` through moq-pattern's `Patterns`
 - [Bytes from an owner that drops](/quest/m2/ts-model/bytes-owner.md) - `Bytes::from_owner` of a frame's segment
 - [rangemap](/quest/m2/ts-model/rangemap.md) - B-tree ranges by a borrowed key, and std's iterators in a crate's fields
 - [Addresses as identity](/quest/m2/ts-model/addresses.md) - `Arc::as_ptr(a) as usize` as a key, which needs a decision

ts/README.md

@@ -389,6 +389,10 @@ each item's fields go into them in order, as `rs.tupleExtend(t, it, [rs.vecPart(
 rs.STRING_PART])`. The crate's own `Default + Extend` collection keeps the defaults stable
 Rust can't override: it reserves nothing, and takes each item by its `extend` of `Some(item)`,
 through `rs.ownPart`. Any other collection in one is refused.
+The crate's own collection is collected by its own `FromIterator`, which `collect` and a
+`collect` into a `Result` or an `Option` of it call with the iterator, as std's do, and std's
+adaptors that take an `IntoIterator`, such as `flat_map`, `flatten`, `chain`, `zip`, and
+`extend`, iterate it by its own `into_iter`.
 
 `clone` of one of std's iterators or adaptors is its `rs.Iter`'s `clone`, which reads on
 from where the original was, independently of it, as std's `Clone` does; one over a hash

ts/fixtures/lang/collects/Cargo.toml

@@ -0,0 +1,14 @@
+[package]
+name = "lang-collects-fixture"
+description = "A part of the language rust2-ts translates, exercised against native Rust"
+version = "0.0.0"
+edition.workspace = true
+license.workspace = true
+publish = false
+
+[lib]
+# The cdylib is the native side of the differential test, built for wasm32.
+crate-type = ["lib", "cdylib"]
+
+[lints]
+workspace = true