fix(resolution): resolve this.#field.method() on the field's type (#1987)

[danusha2345]

Covers the ES private field case from #1987. The untyped list.map case in that issue is #1941.

Problem

this.<field>.<method>() (#1496) resolves on the field's declared type, but only for a public field. The extractor checks that the member is a property_identifier. An ES private field is a private_property_identifier, so this.#items.add(x) was emitted as the bare add. That name exact-matched whichever project method is called add, often the calling method itself.

Fix

• Extraction. The this.<field> branch accepts a private field and keeps the #, emitting this.#items.add. The kernel's this_field_of mirrors this.
• Resolution. matchMethodCall matches this.#field.method before its generic dotted pattern, whose receiver class [\w.]+ has no #, and hands it to matchTsThisFieldCall. That function's field regexes now open with a lookbehind instead of \b for a # name, because \b never matches before #.

The declared-type and new initializer patterns are unchanged, and a builtin or external field type (Set, Map, an array) still yields no edge.

Measured (main ba3c21e vs this branch, kernel on)

Calls edges on lines containing this.#field.method(:

repo	before	after	removed (all verified wrong)	added (all verified right)
node-lru-cache	24	5	24, e.g. #keyMap.get → LRUCache::get, #perf.now → Status::now	5, #perf.now → Perf::now
path-scurry	5	0	5 self-edges, e.g. #fs.lstatSync → PathBase::lstatSync	0
hono	9	7	6, e.g. #var.get → Context::get (self-edge)	4, e.g. #root.insert → Node::insert, #init.send → WSContextInit::send

lru-cache also loses 5 wrong this.#disposed?.push(…) → Stack::push edges, where #disposed is an array. Total edge counts move by exactly these amounts (lru-cache −24, path-scurry −5, hono −2).

Known limit, shared with public fields: a field typed as a type alias to a union isn't followed. lru-cache's #free: StackLike (Stack | Index[]) loses two plausible Stack::push edges, the same result free: StackLike gets today.

Tests

• ts-this-field-call.test.ts: a #field: Mailer and a #field = new Mailer() resolve to Mailer::send over a same-file decoy Outbox::send, and this.#items.add() on a Set stays unresolved over a same-file Cart::add. Both cases fail on main.
• kernel-tsjs-parity: the torture fixture gains a private-field delegator. Parity fails if the kernel mirror is reverted.

Full suite on this branch (Linux, Node 22, native kernel): all tests pass except the known intermittent extraction.test.ts pool-worker crash from #1779 (fixed by #1883), which also occurs on main; that file alone passes 655/655.

🤖 Generated with Claude Code

[colbymchenry]

Thanks @danusha2345! Your commits here were carried into #2028 (authorship preserved), with a few follow-up changes from review, and that is now merged. Closing this one in favour of it. It will be in the next release.