Merge branch 'main' into copilot/add-test-case-for-pull-10875

Author: msyyc

.chronus/changes/HEAD-2026-5-29-15-47-55.md

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+---
+changeKind: dependencies
+packages:
+  - "@typespec/http-client-java"
+---
+
+Update http-client-java Node.js dependencies

.chronus/changes/add-explode-object-query-scenario-2026-6-30-20-9-42.md

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+---
+changeKind: feature
+packages:
+  - "@typespec/http-specs"
+---
+
+Add `Routes_QueryParameters_QueryExpansion_Explode_model` scenario covering a named model-valued query parameter with explode expansion (`{?param*}`), which per RFC 6570 form explode expands each property into its own query entry (`?field=status&value=active`).

.chronus/changes/add-lossy-duration-tests-2026-6-23-9-24-23.md

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+---
+changeKind: fix
+packages:
+  - "@typespec/compiler"
+---
+
+Fix diagnostic target node mapping for value entities.

.chronus/changes/copilot-fix-html-program-viewer-crash-2026-5-26-18-32-40.md

@@ -0,0 +1,7 @@
+---
+changeKind: fix
+packages:
+  - "@typespec/html-program-viewer"
+---
+
+Fix html program viewer crash when rendering search results with missing type kind.

.chronus/changes/copilot-fix-html-program-viewer-crash-2026-5-8-19-28-50.md

@@ -0,0 +1,7 @@
+---
+changeKind: feature
+packages:
+  - "@typespec/compiler"
+---
+
+Support importing .ts decorator modules from TypeSpec source files.

.chronus/changes/copilot-support-importing-typescript-files-2026-5-25-13-53-33.md

@@ -0,0 +1,7 @@
+---
+changeKind: fix
+packages:
+  - "@typespec/compiler"
+---
+
+Fix memory leak in the experimental mutator engine where a module-level `seen` cache pinned the type graph of every mutated program in memory for the lifetime of the process. The cache is now scoped per `Program` (via a `WeakMap`), so it is released once the program is garbage collected while still being shared across the nested mutations required for recursive type graphs to terminate.

.chronus/changes/fix-mutator-seen-cache-leak-2026-6-30-21-10-0.md

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+---
+changeKind: internal
+packages:
+  - "@typespec/compiler"
+---
+
+Fix formatter regression where a `union` used as a named template argument lost its leading `|` indentation

.chronus/changes/fix-named-union-template-arg-format-2026-6-25-9-50-0.md

@@ -0,0 +1,7 @@
+---
+changeKind: fix
+packages:
+  - "@typespec/compiler"
+---
+
+Fix `Expected type.` internal compiler error when a string template interpolates a function call that references a template parameter on a template declaration (e.g. `@doc("${myFn(T)}") model Crud<T extends Reflection.Model> {}`). The deferred function call now defers the whole template, which is evaluated at instantiation.

.chronus/changes/fix-string-template-fn-call-template-decl-2026-6-23.md

@@ -0,0 +1,7 @@
+---
+changeKind: internal
+packages:
+  - "@typespec/http-client-java"
+---
+
+Replace `js-yaml` with `yaml` for code-model serialization and drop `lodash` in favor of a built-in array comparison.