refactor(quick-dev): deduplicate slug derivation and clarify title variable

Extract shared slug derivation logic above the route fork in step-01 so
both one-shot and plan-code-review routes use a single instruction block.
Add explicit title variable assignment in step-oneshot before it is
referenced in the Generate Spec Trace section.

src/bmm-skills/4-implementation/bmad-quick-dev/step-01-clarify-and-route.md

@@ -52,13 +52,13 @@ Never ask extra questions if you already understand what the user intends.
    - On **K**: Proceed as-is.
 5. Route — choose exactly one:
 
+   Derive a valid kebab-case slug from the clarified intent. If the intent references a tracking identifier (story number, issue number, ticket ID), lead the slug with it (e.g. `3-2-digest-delivery`, `gh-47-fix-auth`). If `{implementation_artifacts}/spec-{slug}.md` already exists, append `-2`, `-3`, etc. Set `spec_file` = `{implementation_artifacts}/spec-{slug}.md`.
+
    **a) One-shot** — zero blast radius: no plausible path by which this change causes unintended consequences elsewhere. Clear intent, no architectural decisions.
-   1. Derive a valid kebab-case slug from the clarified intent. If the intent references a tracking identifier (story number, issue number, ticket ID), lead the slug with it (e.g. `3-2-digest-delivery`, `gh-47-fix-auth`). If `{implementation_artifacts}/spec-{slug}.md` already exists, append `-2`, `-3`, etc. Set `spec_file` = `{implementation_artifacts}/spec-{slug}.md`.
 
    **EARLY EXIT** → `./step-oneshot.md`
 
    **b) Plan-code-review** — everything else. When uncertain whether blast radius is truly zero, choose this path.
-   1. Derive a valid kebab-case slug from the clarified intent. If the intent references a tracking identifier (story number, issue number, ticket ID), lead the slug with it (e.g. `3-2-digest-delivery`, `gh-47-fix-auth`). If `{implementation_artifacts}/spec-{slug}.md` already exists, append `-2`, `-3`, etc. Set `spec_file` = `{implementation_artifacts}/spec-{slug}.md`.
 
 
 ## NEXT

src/bmm-skills/4-implementation/bmad-quick-dev/step-oneshot.md

@@ -32,9 +32,11 @@ If a finding is caused by this change but too significant for a trivial patch, H
 
 ### Generate Spec Trace
 
+Set `{title}` = a concise title derived from the clarified intent.
+
 Write `{spec_file}` using `./spec-template.md`. Fill only these sections — delete all others:
 
-1. **Frontmatter** — fill `title`, `type`, `created`, `status: 'done'`. Add `route: 'one-shot'`.
+1. **Frontmatter** — set `title: '{title}'`, `type`, `created`, `status: 'done'`. Add `route: 'one-shot'`.
 2. **Title and Intent** — `# {title}` heading and `## Intent` with **Problem** and **Approach** lines. Reuse the summary you already generated for the terminal.
 3. **Suggested Review Order** — append after Intent. Build using the same convention as `./step-05-present.md` § "Generate Suggested Review Order" (spec-file-relative links, concern-based ordering, ultra-concise framing).