docs: add implementation plan overview and Phase 1 detail

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

docs/superpowers/plans/2026-04-17-kochwas-overview.md

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+# Kochwas — Implementation Plan Overview
+
+**Goal:** Deliver the Kochwas MVP per the design spec in six phases, each ending in runnable, testable software.
+
+**Reference:** `docs/superpowers/specs/2026-04-17-kochwas-design.md`
+
+---
+
+## Phase Map
+
+| # | Name | Outcome | Plan file |
+|---|------|---------|-----------|
+| 1 | Foundations | Scaffolded SvelteKit app, SQLite schema with FTS5, Docker dev setup, pure-function modules (ingredient-parser, scaler, json-ld-extractor, iso8601) all unit-tested, `/api/health` endpoint | `2026-04-17-kochwas-phase-1-foundations.md` |
+| 2 | Import Pipeline | Working recipe import from URL to DB incl. images, preview endpoint, profile CRUD, integration tests with real HTML fixtures | `2026-04-xx-kochwas-phase-2-import.md` |
+| 3 | Core UI & Local Search | RecipeView component (mobile-first), Search page with FTS5 results, profile selector, rating/favorite/cooked actions | `2026-04-xx-kochwas-phase-3-ui.md` |
+| 4 | Web Search & Admin | SearXNG integration, whitelist admin UI, preview-before-save flow, profile admin | `2026-04-xx-kochwas-phase-4-web-admin.md` |
+| 5 | Advanced Features | Comments, tag editor, cooking-log view, print view, rename/delete, backup/restore ZIP | `2026-04-xx-kochwas-phase-5-advanced.md` |
+| 6 | PWA & Polish | Service worker + offline, Wake-Lock, install prompt, mobile-UX polish, E2E tests, prod Docker image | `2026-04-xx-kochwas-phase-6-pwa.md` |
+
+Each phase produces working software on its own. A phase is complete when all its tasks are checked off, tests pass, and a manual smoke-test on Docker Desktop succeeds.
+
+## Sequencing Rule
+
+Phases are strictly sequential. Do not start Phase N+1 before Phase N is green (tests + smoke test).
+
+## Conventions (all phases)
+
+- **Commits:** each task ends with a single atomic commit. Commit messages follow conventional-commits (`feat:`, `fix:`, `chore:`, `test:`, `docs:`, `refactor:`).
+- **Line endings:** LF only (`.gitattributes` already in place).
+- **Tests:** Vitest for unit/integration, Playwright for E2E. Every pure function gets a unit test first (TDD).
+- **Code style:** Prettier + ESLint using SvelteKit defaults. No emojis in code unless requested.
+- **Dev env:** Local Docker Desktop for the SearXNG container; the SvelteKit app runs via `npm run dev` for fast iteration. Production Docker image built in Phase 6.
+- **TypeScript strict mode** on from the start. No `any` unless justified inline.