fix(p10-1b): PR review round 1 — 5 actionable items

(1) tasks/HOTFIXES.md: add 2026-05-20 entry for path-sanitize gap in
    module_path_for_python / _tsjs (promised in task spec line 55 but
    not landed in round 0). Bidirectional cross-link added.

(2) crates/kebab-parse-code: dedup filename_from_workspace_path /
    strip_extension / join_symbol via new pub(crate) module scaffold.rs.
    Removed 9 byte-identical fn copies across rust/python/typescript/
    javascript extractors. Pure refactor — no behavior change.

(3) crates/kebab-parse-code/tests/fixtures/sample.py: @staticmethod was
    semantically inappropriate on a module-level fn (class-method
    decorator). Changed to @no_type_check; test assertion updated.

(5)+(6) crates/kebab-parse-code/src/lang.rs: add tests/test_foo.py case
    to module_path_for_python test + doc clarifying that tests/ /
    examples/ / benches/ are intentionally not stripped.

(4) PUSH BACK — TS/JS class decorator handling is design intent of 1B
    1차 (typescript.rs:242-244 + HOTFIXES entry 2 already in place).
    No code change.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

crates/kebab-parse-code/src/scaffold.rs

@@ -0,0 +1,45 @@
+//! `kebab-parse-code::scaffold` — shared pure helpers used by all
+//! per-language extractor modules.
+//!
+//! These are `pub(crate)` utilities extracted from the four extractor
+//! modules (rust / python / typescript / javascript) where identical
+//! copies existed. Keeping them here is the single source of truth.
+
+/// Extract the last path component (filename) from a `/`-separated
+/// workspace path string.
+/// For a path like `crates/x/src/foo.rs` this returns `foo.rs`.
+pub(crate) fn filename_from_workspace_path(p: &str) -> String {
+    p.rsplit('/').next().unwrap_or(p).to_string()
+}
+
+/// Strip the last dot-extension from a filename string.
+/// A leading dot (hidden-file convention) is preserved as-is.
+/// `foo.rs` → `foo`, `.hidden` → `.hidden`, `noext` → `noext`.
+pub(crate) fn strip_extension(filename: &str) -> String {
+    match filename.rfind('.') {
+        Some(0) => filename.to_string(),
+        Some(idx) => filename[..idx].to_string(),
+        None => filename.to_string(),
+    }
+}
+
+/// Join `(mod_prefix, mod_path, name)` into a dotted symbol string.
+///
+/// Used by Python / TypeScript / JavaScript extractors. Rust uses
+/// `::` separators instead and builds symbols inline; this helper
+/// covers the `.`-joined languages.
+///
+/// Empty `mod_prefix` (e.g. file is `__init__.py` at workspace root)
+/// drops the leading prefix segment; empty `mod_path` (file top-level)
+/// drops the class-nesting middle segment.
+pub(crate) fn join_symbol(mod_prefix: &str, mod_path: &[String], name: &str) -> String {
+    let mut parts: Vec<&str> = Vec::with_capacity(mod_path.len() + 2);
+    if !mod_prefix.is_empty() {
+        parts.push(mod_prefix);
+    }
+    for p in mod_path {
+        parts.push(p.as_str());
+    }
+    parts.push(name);
+    parts.join(".")
+}