docs: add a review agenda and config compatibility rules

Reviewing the project used to mean re-stating what to look at every time.
docs/REVIEW.md now holds that agenda once — nine areas, each anchored to this
codebase — and both entry points point at it rather than copying it: the
/review-project command in .claude/commands, and a section in CLAUDE.md so a
plain-language review request lands in the same place.

STANDARDS.md gains a "Config file compatibility" section. The project has
applied the same rule three times (Theme, JobListView, TimeoutSeconds) without
ever writing it down: a new Config field is omitempty and its zero value means
the previous behavior, a meaningful zero is never backfilled on load, and an
unrecognised enum value reads as the default through one shared helper. With no
migration step and hand-editable files, that is what keeps older configs working.

Also removes docs/PLAN-compact-job-list.md, implemented in edabc57 — everything
but the version bump, which now waits for the release along with the rest of
the Unreleased section. .claude/settings.local.json is ignored so the shared
command can be tracked without per-developer permissions.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

CLAUDE.md

@@ -12,6 +12,12 @@ application service, scheduler, storage, and command runner in one binary.
 - [docs/TESTS.md](docs/TESTS.md) — test layout and conventions.
 - [docs/ROADMAP.md](docs/ROADMAP.md) — deliberately out of scope.
 
+## Reviewing the project
+
+When the user asks for a review of the project (rather than of a specific
+diff), follow [docs/REVIEW.md](docs/REVIEW.md) — it is the agenda, and the
+`/review-project` command runs the same thing. Do not improvise a checklist.
+
 ## Key rules (full list in STANDARDS.md)
 
 - `src/app.Service` is the sole owner of job and runtime state; the UI reads it
@@ -22,7 +28,7 @@ application service, scheduler, storage, and command runner in one binary.
   a regression test.
 - UI view constructors accept an injected `*app.Service`; `app.Open()` is called
   only from `run.go`.
-- Off-main-thread widget updates must go through `fyne.Do` (Fyne v2.6.x).
+- Off-main-thread widget updates must go through `fyne.Do` (Fyne v2.7.4).
 
 ## Build and test