refactor: replace all inline error message ternaries with getErrorMessage()
Eliminates ~120 repetitions of `err instanceof Error ? err.message : String(err)`
across the entire extension source tree. All callers now import and use
`getErrorMessage` from the canonical `./error-utils.js`.
Files updated (56 files):
- auto.js, auto-worktree.js, auto-recovery.js, auto-dashboard.js, auto-timers.js
- auto-prompts.js, auto-start.js, auto-post-unit.js, auto-model-selection.js
- auto/phases.js, auto/loop.js, auto/infra-errors.js
- autonomous-solver-eval.js, bootstrap/agent-end-recovery.js, bootstrap/db-tools.js
- bootstrap/exec-tools.js, bootstrap/journal-tools.js, bootstrap/register-extension.js
- bootstrap/register-hooks.js, canonical-milestone-plan.js, changelog.js
- clean-root-preflight.js, code-intelligence.js, commands-add-tests.js
- commands-debug.js, commands-eval-review.js, commands-handlers.js
- commands-maintenance.js, commands-pr-branch.js, commands-scan.js, commands-ship.js
- commands-todo.js, commands-worktree.js, definition-io.js, doctor.js
- doctor-config-checks.js, doctor-engine-checks.js, ecosystem/loader.js
- eval-review-schema.js, exec-sandbox.js, execution-instruction-guard.js
- graph-context.js, hook-emitter.js, index.js, learning/runtime.js
- lifecycle-hooks.js, onboarding-state.js, orphan-worktree-sweep.js
- planning-depth.js, quick.js, scaffold-keeper.js, sf-db/sf-db-core.js
- slice-cadence.js, sm-client.js, spec-projections.js, subagent/background-jobs.js
- subagent/isolation.js, sync-scheduler.js, tools/exec-tool.js
- tools/sift-search-tool.js, tools/workflow-tool-executors.js, ui/index.js
- uok/a2a-agent-server.js, uok/auto-dispatch.js, uok/auto-unit-closeout.js
- uok/auto-verification.js, uok/chaos-monkey.js, uok/gate-runner.js
- vault-resolver.js, workflow-install.js, workflow-plugins.js, worktree-manager.js
- worktree-resolver.js
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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