docs(architecture): refine Qt migration, Tauri exit & PWA reuse strategy

AGENTS.md

@@ -16,7 +16,7 @@
 
 The app supports a multi-provider AI stack (Gemini, OpenAI, Claude, Grok, OpenRouter, Ollama, WebLLM, ONNX Runtime Web, Transformers.js), four AI execution modes (Hybrid / Cloud / Local / Eco), real-time collaboration with E2E encryption, a Plot Board v2 with swimlane/canvas/timeline modes, character/world management, manuscript export, voice dictation, and a 19-locale i18n layer.
 
-**Native desktop strategy is changing (ADR-0021, 2026-08-20) — read before touching desktop/native code.** CEF is retired from the target architecture. Current direction: React/PWA stays the web product → Tauri 2 is **transitional only** (itself retired once Qt reaches Stable) → an authoritative Rust Core (`crates/`, an independent Cargo workspace from `src-tauri/`) → Qt 6/Qt Quick as the primary native product → GPUI admitted later, behind a strict gate. Full plan: `docs/native/ROADMAP-QT-GPUI-DESKTOP.md`; decision record: `docs/adr/0021-qt-gpui-native-desktop-strategy.md`. Extraction has started: `crates/worldscript-project` (renderer-neutral project schema/validation/migration, headless — no GUI deps) is wired to one real Tauri command (`worldscript_project_validate` in `src-tauri/src/commands/project_core.rs`) via a cross-workspace Cargo path dependency, and the first typed DesktopPlatform caller observes its bounded verdict on desktop loads without changing the existing TS authority. The envelope is synthesized and partial; unknown TS-only fields are not validated. Priority order for what gets extracted next: `docs/native/CORE-MIGRATION-LEDGER.md`.
+**Native desktop strategy is changing (ADR-0021, 2026-08-20) — read before touching desktop/native code.** CEF is retired from the target architecture. Current direction: React/PWA stays the web product → Tauri 2 is **transitional only** (itself retired once Qt reaches Stable) → an authoritative Rust Core (`crates/`, an independent Cargo workspace from `src-tauri/`) → Qt 6/Qt Quick as the primary native product → GPUI admitted later, behind a strict gate. Full plan: `docs/native/ROADMAP-QT-GPUI-DESKTOP.md`, amended by the binding `docs/native/DESKTOP-MIGRATION-ROADMAP-REV3.md` (gates G1.5/G2.5, Wave 2.5); decision record: `docs/adr/0021-qt-gpui-native-desktop-strategy.md`. Extraction has started: `crates/worldscript-project` (renderer-neutral project schema/validation/migration, headless — no GUI deps) is wired to one real Tauri command (`worldscript_project_validate` in `src-tauri/src/commands/project_core.rs`) via a cross-workspace Cargo path dependency, and the first typed DesktopPlatform caller observes its bounded verdict on desktop loads without changing the existing TS authority. The envelope is synthesized and partial; unknown TS-only fields are not validated. Priority order for what gets extracted next: `docs/native/CORE-MIGRATION-LEDGER.md`.
 
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CLAUDE.md

@@ -101,7 +101,7 @@ WorldScript Studio is an offline-first PWA — a React 19 SPA with Google Gemini
 
 ### Native desktop strategy (ADR-0021) — read before touching desktop/native code
 
-CEF (Chromium Embedded Framework) is **retired from the target architecture**, not deferred (2026-08-20). Current direction, decided in `docs/adr/0021-qt-gpui-native-desktop-strategy.md` (supersedes ADR-0019/0020): React/PWA stays the first-class web product → **Tauri 2 is transitional only** and is itself retired once Qt reaches Stable (not a permanent third runtime) → an authoritative **Rust Core** (`crates/`, independent Cargo workspace from `src-tauri/Cargo.toml` — see below) → **Qt 6/Qt Quick (QML)** as the only current native production target ("Hardened Edition"). **GPUI** remains a separately gated exploration, not a numbered execution commitment; see `docs/native/GPUI-EXPLORATIONS.md`. The Qt-first roadmap has 22 execution entries (Wave 0–20 plus Wave 4.5): `docs/native/ROADMAP-QT-GPUI-DESKTOP.md`. If you find CEF referenced as a *future* target anywhere in the repo, that's stale history (see `docs/historical/cef/README.md`) — flag it.
+CEF (Chromium Embedded Framework) is **retired from the target architecture**, not deferred (2026-08-20). Current direction, decided in `docs/adr/0021-qt-gpui-native-desktop-strategy.md` (supersedes ADR-0019/0020): React/PWA stays the first-class web product → **Tauri 2 is transitional only** and is itself retired once Qt reaches Stable (not a permanent third runtime) → an authoritative **Rust Core** (`crates/`, independent Cargo workspace from `src-tauri/Cargo.toml` — see below) → **Qt 6/Qt Quick (QML)** as the only current native production target ("Hardened Edition"). **GPUI** remains a separately gated exploration, not a numbered execution commitment; see `docs/native/GPUI-EXPLORATIONS.md`. The Qt-first roadmap has 22 execution entries (Wave 0–20 plus Wave 4.5): `docs/native/ROADMAP-QT-GPUI-DESKTOP.md`, amended by the binding `docs/native/DESKTOP-MIGRATION-ROADMAP-REV3.md` (gates G1.5/G2.5, Wave 2.5). If you find CEF referenced as a *future* target anywhere in the repo, that's stale history (see `docs/historical/cef/README.md`) — flag it.
 
 **Rust Core extraction is in progress.** `crates/worldscript-project` (Wave 2 first slice) is a renderer-neutral project schema/validation/migration/plain-I/O crate mirroring `types.ts`'s `StoryProject`/`Character`/`World`/`StorySection` as plain `Vec<T>` (not Redux's `EntityState<T>` union — the typed boundary adapter normalizes both array and EntityState inputs for the bounded shadow caller). Proven headless (`cargo test` + `wsproj` CLI, zero GUI/Tauri deps) and wired to one real Tauri command, `worldscript_project_validate` (`src-tauri/src/commands/project_core.rs`), via a **path dependency across two independent Cargo workspaces** — `crates/worldscript-project` is a member of the `crates/` workspace, `src-tauri/Cargo.toml` depends on it by path without unifying the workspaces; this compiles and links cleanly. The first DesktopPlatform caller observes a synthesized, partial envelope during desktop project loads; it does not switch authority and unknown TS-only fields are not validated. `docs/native/CORE-MIGRATION-LEDGER.md` sets the capability-priority order for what's extracted next (logger/diagnostics and task-orchestration expansion before IDB storage/encryption or `features/project/` domain logic). CI: new `core-rust` job mirrors `rust-tauri`'s fmt/check/clippy/test but needs no GTK/WebKit apt-get steps (zero GUI deps); both are path-scoped via the `changes` job and legitimately show `skipping` on PRs that don't touch their respective directories.