docs: add stats dashboard design docs, plans, and knowledge base

- Stats dashboard redesign design and implementation plans
- Episode detail and Anki card link design
- Internal knowledge base restructure
- Backlog tasks for testing, verification, and occurrence tracking

docs/workflow/README.md

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+<!-- read_when: starting implementation, deciding whether to plan, or checking handoff expectations -->
+
+# Workflow
+
+Status: active  
+Last verified: 2026-03-13  
+Owner: Kyle Yasuda  
+Read when: planning or executing nontrivial work in this repo
+
+This section is the internal workflow map for contributors and agents.
+
+## Read Next
+
+- [Planning](./planning.md) - when to write a lightweight plan vs a full execution plan
+- [Verification](./verification.md) - maintained test/build lanes and handoff gate
+- [Release Guide](../RELEASING.md) - tagged release workflow
+
+## Default Flow
+
+1. Read the smallest relevant docs from `docs/`.
+2. Decide whether the work needs a written plan.
+3. Implement in small, reviewable edits.
+4. Run the cheapest sufficient verification lane.
+5. Escalate to the full maintained gate before handoff when the change is substantial.
+
+## Boundaries
+
+- Internal process lives in `docs/`.
+- Public/product docs live in `docs-site/`.
+- Generated artifacts are never edited by hand.