fix: cli.py help-patch NameError under a future typer, new record's kb/ paths (#148, #150)

cli.py's typer._click.core.format_help patch was applied a second time
outside the try/except that exists to let a future typer without
typer._click degrade to plain Click help instead of crashing on import.
That second, unconditional line referenced two names the failed import
never defines, so the exact case the fallback exists for raised
NameError on every invocation instead. Removed; a subprocess test with
a targeted import hook (not sys.modules poisoning, which breaks typer
itself, and not importlib.reload, which would stay green against the
bug) pins that the fallback now actually falls back.

The new command's cli_contract record promised kb/concepts/<Name>.md
and kb/sources/Source - <Name>.md - both types have since grown a
layout: that files a page under a subtype-computed subdirectory, the
same rule an entity or a project already follows. Notes for concept
and source now name the subdirectory and where it comes from;
comparison was checked against its type-spec and left alone. Also
found and fixed: new source's example line omitted source_type,
fidelity and authority, so it could never succeed as written. A new
test reads each variant's note out of the record and checks the
written path against the pattern it promises, instead of against a
path re-typed into the test - which is what let the existing per-type
path tests stay green through this exact drift.

tools/CONTRACT.md regenerated via `wikitool docs contract --apply`;
pytest (1550), docs verify and instructions verify all green.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01SnAJ7Z3CpVD3PRbN73QtU2

tools/CONTRACT.md

@@ -155,9 +155,9 @@ Scaffold a new wiki page of any type.
 **SYNOPSIS**
 
 - `wikitool new <type-name> --name "<Name>" [--type <path>] [--set field=value ...]` - Any type; its type-spec decides fields, directory, title prefix and template.
-- `wikitool new entity --name "<Name>" --set entity_type=<t> [--set tags=a,b] [--set related=X,Y] [--set sources="Source - Z"] [--set provenance=sourced|general|mixed]` - Writes `kb/entities/<subdir>/<Name>.md`
-- `wikitool new concept --name "<Name>" --set concept_type=<t> ...` - Writes `kb/concepts/<Name>.md`
-- `wikitool new source --name "<Name>" --set raw_files=raw/notes/x.md,raw/notes/y.md [--set source_url=<URL>] [--set entities=A,B] [--set concepts=C,D]` - Writes `kb/sources/Source - <Name>.md` (prefix added automatically) with a `raw_files:` list; rejects paths that don't exist
+- `wikitool new entity --name "<Name>" --set entity_type=<t> [--set tags=a,b] [--set related=X,Y] [--set sources="Source - Z"] [--set provenance=sourced|general|mixed]` - Writes `kb/entities/<subdir>/<Name>.md` - `<subdir>` from `entity_type` via the type-spec's `layout:`
+- `wikitool new concept --name "<Name>" --set concept_type=<t> ...` - Writes `kb/concepts/<subdir>/<Name>.md` - `<subdir>` from `concept_type` via the type-spec's `layout:`
+- `wikitool new source --name "<Name>" --set source_type=<t> --set raw_files=raw/notes/x.md,raw/notes/y.md --set fidelity=<f> --set authority=<a> [--set source_url=<URL>] [--set entities=A,B] [--set concepts=C,D]` - Writes `kb/sources/<subdir>/Source - <Name>.md` (prefix added automatically; `<subdir>` from `source_type` via the type-spec's `layout:`) with a `raw_files:` list; rejects paths that don't exist
 - `wikitool new comparison --name "X vs Y" --set entities=X,Y` - Writes `kb/comparisons/X vs Y.md`
 - `wikitool new project --name "<Name>" --set responsibility=<bereich> [--resume]` - Writes `kb/gtd/<bereich>/<Name>.md` and, with a task tracker configured, a same-named tracker project