diff --git a/ARCHITECTURE.md b/ARCHITECTURE.md
index 5e0d851..8b12a47 100644
--- a/ARCHITECTURE.md
+++ b/ARCHITECTURE.md
@@ -99,9 +99,10 @@ JSON as-is.
 
 ## Component tree
 
-```
 App
-├─ Header         name, image, date steppers, session steppers, Save/Load/Clear (dead)
+├─ Header         name, image, date steppers, session steppers,
+│                 Save (download)/Load (file import)/Clear (wipe)
+├─ Modal          overlay dialog: confirm (action) or error (close)
 ├─ Sidebar
 │  ├─ Image       portrait
 │  ├─ Names       first / alias «» / last
@@ -125,6 +126,13 @@ closures by index; "move" transfers a row between the personal and common
 inventories, "remove" deletes it. The "…" (details) button and the search
 "+" button are unwired.
 
+Persistence lives in `state::persist`: on hydration a deferred timer loads
+the saved dashboard from localStorage (SSR markup stays authoritative),
+then a debounced (500 ms) effect writes on any store change via
+`store.track()`. `parse_dashboard` version-checks the JSON against
+`Settings::VERSION` (the migration hook). `ModalState` holds title/message/
+action as signals; the confirm button reads the action at click time.
+
 `Numput` is the shared numeric input: `+n`/`-n` adjust relative to the
 current value, a plain number sets absolutely, invalid input is reverted,
 and the value renders with thousands separators. `NumputChange` is the same
@@ -148,12 +156,11 @@ currently mounted on any page.
 
 ## Current gaps
 
-- No persistence; state is recreated from `mock()` each load
-- `Character` and `Wiki` pages render placeholders
 - Quests, notes, contacts: models and mock data only
+- `Character` and `Wiki` pages render placeholders
 - Prepared spells list is empty; `Spell` is a name-only stub; attunements
-  have no UI; `Settings` is empty
-- Save/Load/Clear buttons and the item "+"/"…" buttons are dead
+  have no UI; `Settings` has only `version`
+- The item "+"/"…" buttons are dead
 - `foundry.json` was loaded twice (fixed); ~3.9 MB of JSON is bundled
   into the WASM and parsed on startup
 - Several unused dependencies (see `MODERNIZE.md`); kept for now by
diff --git a/MODERNIZE.md b/MODERNIZE.md
index ec95bae..74df88b 100644
--- a/MODERNIZE.md
+++ b/MODERNIZE.md
@@ -71,9 +71,11 @@ under consideration.
    `usize`. `Numput` keeps its generics.
 
 4. **`serde` (direct) → remove now, re-add in ROADMAP phase 1.**
-   No derives exist today; `serde_json::Value` works without naming `serde`
-   in `Cargo.toml`. Phase 1 (persistence) re-adds
+   No derives existed at the time; `serde_json::Value` works without naming
+   `serde` in `Cargo.toml`. Phase 1 (persistence) re-added
    `serde = { version = "1", features = ["derive"] }`.
+   **APPLIED 2026-08-16:** persistence is in; `serde` is used by every entity
+   derive — keep it.
 
 Result: dropping the under-consideration items takes `[dependencies]` from
 27 entries to about 18. If the five kept deps are dropped later too, it goes
diff --git a/README.md b/README.md
index 2aebf90..1187f36 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,9 @@ game. The UI is in Russian.
 
 ## What works today
 
-- Campaign header: name, in-game date steppers, session counter
+- Campaign header: name, in-game date steppers, session counter, and
+  Save / Load / Clear: download `dashboard.json`, import a file back,
+  wipe to a blank campaign
 - Character sidebar: portrait, names, class, level, XP, hit points with
   temp HP bar, hit dice, death saves, spell slots
 - Inventories page (`/inv`): personal and party-common inventories,
@@ -14,8 +16,9 @@ game. The UI is in Russian.
 - Bundled 5e.tools item data (~5k items) with fuzzy search components
   (search is not mounted on a page yet)
 
-State is mock data: nothing is persisted, and several buttons and pages are
-stubs. The phased plan to fix that is in [ROADMAP.md](./ROADMAP.md).
+State autosaves to localStorage (debounced) and survives reloads; export/
+import round-trips through a JSON file. The phased plan is in
+[ROADMAP.md](./ROADMAP.md).
 
 ## Tech stack
 
@@ -48,13 +51,14 @@ cargo check --target wasm32-unknown-unknown --no-default-features --features hyd
 
 ## Tests
 
-End-to-end smoke tests live in `end2end/` (Playwright). With the dev server
-running on port 3000:
+End-to-end tests live in `end2end/` (Playwright): a smoke spec and a
+persistence spec (reload keeps state; export/import round trip). With the
+dev server running:
 
 ```sh
 cd end2end
 npm install
-npx playwright test
+npx playwright test --project=chromium
 ```
 
 or let cargo-leptos manage the server: `cargo leptos end2end`.
diff --git a/ROADMAP.md b/ROADMAP.md
index 39f808a..e9aee6a 100644
--- a/ROADMAP.md
+++ b/ROADMAP.md
@@ -72,24 +72,32 @@ Cheap, unblocks the rest. Can happen any time; do it first.
 
 The foundation. Every later phase depends on it.
 
-- [ ] derive `serde::Serialize` / `Deserialize` on all entities in `src/entities/mod.rs`
+- [x] derive `serde::Serialize` / `Deserialize` on all entities in `src/entities/mod.rs`
   (Dashboard, PlayerData, Balance, Inventory, InventoryEntry, InventoryItem,
   QuestBook, Quest, NoteBook, Note, ContactBook, Contact, SpellSlots, Attunements,
   PreparedSpells, Spell, HitDice, DeathSaveThrows, Name, Settings; enums:
   InventoryKind, ContactStatus, PreparedSpell)
-- [ ] verify `Store` derive and `serde` derive coexist on the same structs (prototype first)
-- [ ] add a `version` field to `Settings`; add a migration hook for future format changes
-- [ ] serialize Dashboard to JSON; save to localStorage via `web_sys::Storage`
+- [x] verify `Store` derive and `serde` derive coexist on the same structs (prototype first)
+- [x] add a `version` field to `Settings`; add a migration hook for future format changes
+- [x] serialize Dashboard to JSON; save to localStorage via `web_sys::Storage`
   (feature-gate to `hydrate`/`csr`; SSR renders mock/empty)
-- [ ] auto-save on change — debounced effect over the `Store` — plus manual Save button
-- [ ] Load button: restore from localStorage with an overwrite confirm
-- [ ] Clear button: wipe localStorage with a confirm
-- [ ] export: download `dashboard.json` as a blob
-- [ ] import: file input → parse → validate version → replace state
-- [ ] on startup, hydrate from localStorage; keep `mock()` as the fallback / "New dashboard"
+- [x] auto-save on change — debounced effect over the `Store` — plus manual Save button
+- [x] Load button: restore from localStorage with an overwrite confirm
+- [x] Clear button: wipe localStorage with a confirm
+- [x] export: download `dashboard.json` as a blob
+- [x] import: file input → parse → validate version → replace state
+- [x] on startup, hydrate from localStorage; keep `mock()` as the fallback / "New dashboard"
 - **Acceptance:** close the tab, reopen — state is intact. Export → import into a
   fresh browser — identical state.
 
+**Done (2026-08-16):** implementation in `src/state/persist.rs` + header buttons +
+`components/modal.rs`; e2e-verified in chromium (reload persistence and
+export/import round trip). Notes:
+- Save = download; Load = file import; Clear = wipe (merged per user decision).
+- Clear writes the blank dashboard back to storage; mock stays the first-visit fallback.
+- Version check is the migration hook: `parse_dashboard` returns
+  `ImportError::{Parse, NewerVersion, OldVersion}` (RU messages).
+
 ## Phase 2 — Character page (M, ~1-2 days)
 
 `/` currently renders the literal string "character".