fix(newos4): six crash classes from the feedback queue (v4.6.158)

Each item is symptom -> cause -> fix, re-verified against the served bytes.

1. debug-ai panel threw "Cannot read properties of undefined (reading 'substring')"
   (RPT-20261108-231622). _updateDebugPanel and two sibling previews called
   JSON.stringify(entry.args).substring(); JSON.stringify(undefined) returns
   undefined, and _toolCallLog entries carry args: undefined for any tool call
   with no arguments. All three previews now go through _formatToolArgs(), which
   renders "null" and never throws.

2. test_module threw "Cannot convert undefined or null to object"
   (RPT-20261108-232127). Object.keys(instance.commands) assumed every module
   initialises a command map. The throw landed after loadModuleFromCode had
   already succeeded, so the rolledBack:true branches were skipped and an
   unverified module stayed loaded. Both sites now require instance.commands.

3. list_files threw "originalPath.replace is not a function" (RPT-20261109-172742,
   3 occurrences in errors.json). A model can send a non-string path despite the
   schema. The path family (list_files/read_file/write_file/make_directory/
   delete_file) now coerces through _pathArg() and answers the tool's own honest
   error instead of a TypeError.

4. wpm search failed for EVERY keyword (RPT-20261109-123907): packages.json entry
   `kanban` used `description` while the other 31 use `desc`, and search() called
   pkg.desc.toLowerCase() mid-loop. Catalog reads now go through _pkg() /
   _packageMap() (desc || description, values coerced to strings), and the kanban
   entry carries name/version/desc/commands. Re-running the original loop for
   pdf/git/zzz is clean.

5. wx/webxai/webx turned a chat-lock timeout into an unhandled rejection
   (RPT-20261107-150726): forwardToAI() called chat(args) in a synchronous
   function without returning or catching the promise, so the 10 s busy throw
   never reached dispatchCommand's catch. It now returns the promise with a
   .catch that prints "AI error: ..." through terminal.print — console.error is
   hooked by the debug supervisor and would re-file the same report.

6. CryptoGzip._base64ToBytes threw a raw DOMException on non-base64 input
   (RPT-20261102-203616). It now validates first and throws
   Error("not valid base64 input (<reason>)"). The duplicate shadowing
   definitions at the bottom of the class were deleted — the later copy is the
   one that carried the unguarded atob().

Also regenerated modules/core/core-bundle.js (generated, never hand-edited) and
bumped the build v4.6.157 -> v4.6.158 (main.html x3 + module-loader.js).

Verified: 35/35 node tests, including 6 new regression tests each proven red
against the pre-fix source; an independent orchestrator harness 36/36; and
newos4-maintain.py --fix all PASS after regenerating the stale changelog page.
Served bytes are byte-identical for the bundle, main.html and both ext modules,
and a live headless-Chromium run against v4.6.158 shows WpmModule.search('pdf')
returning 1 result, the debug panel rendering a no-arg entry as "null",
_base64ToBytes('grüße') raising a plain Error that names base64, and 0 JS errors
on load.

m.pull (RPT-20261102-211438) is closed as a usage error: no module in the tree
defines pull(); the real interfaces are the webdav-pull and model-pull commands.

0 files changed, 0 insertions, 0 deletions