ci: fix tauri --ci flag in woodpecker

ci: add clippy component in rust container
ci: add woodpecker pipeline for build and tests
2026-11-10 15:42:01 +03:00 · 2026-09-20 02:35:05 +03:00 · 2026-09-20 02:26:02 +03:00 · 2026-09-20 02:22:50 +03:00 · 2026-08-23 18:45:27 +03:00 · 2026-08-19 16:52:30 +03:00
23 changed files with 1076 additions and 393 deletions
--- a/.woodpecker.yaml
+++ b/.woodpecker.yaml
@ -0,0 +1,22 @@
+when:
+  - event: [push, manual]
+
+steps:
+  - name: test-engine
+    image: node:22-bookworm-slim
+    commands:
+      - npm ci
+      - npx tsc --noEmit
+      - npx vitest run
+
+  - name: build-tauri-linux
+    image: rust:1-bookworm
+    commands:
+      - rustup component add clippy
+      - apt-get update && apt-get install -y libwebkit2gtk-4.1-dev librsvg2-dev libssl-dev libxdo-dev libayatana-appindicator3-dev
+      - curl -fsSL https://deb.nodesource.com/setup_22.x | bash -
+      - apt-get install -y nodejs
+      - npm ci
+      - cargo clippy --manifest-path src-tauri/Cargo.toml -- -D warnings
+      - cargo test --manifest-path src-tauri/Cargo.toml
+      - CI=true npx tauri build --no-bundle --ci
--- a/ARCHITECTURE.md
+++ b/ARCHITECTURE.md
@ -23,13 +23,16 @@ src/
    editor.ts        CodeMirror 6 wiring: highlight, results overlay, copy
    search.ts        cross-sheet search overlay (text + result-value queries)
    export.ts        renders the sheet + results to a PNG (clipboard/file)
+    sparkline.ts     SVG sparkline renderer for `chart` results
    app.css          themes (light/dark via CSS variables)
  main.ts            app bootstrap: documents, settings, status bar, dnd
+  workspace.ts       cross-sheet references: exports cache, cycle detection
  storage.ts         Tauri commands / localStorage fallback
  extensions.ts      runs user .js files in a QuickJS/WASM sandbox, bridged
                     to the engine's numi.* API
  i18n.ts            interface strings (en/ru)
  updater.ts         checks tauri-plugin-updater, installs + relaunches
+  logger.ts          thin console wrapper (info/warn/error)
 src-tauri/
  src/main.rs        tray, hide-to-tray, storage commands, rates fetching
                     (open.er-api.com + CoinGecko + Yahoo Finance v8 chart)
@ -300,7 +303,7 @@ All files below live in `%APPDATA%/app.summarum.calc` (or the user-chosen folder

 ## Tests

-`npm test` runs 259 vitest cases: `src/engine/*.test.ts` covers every
+`npm test` runs 373 vitest cases across 21 files: `src/engine/*.test.ts` covers every
 expression class, both languages, deterministic injected rates, goal seek,
 historical rates (injected), date-format literals/display (dedicated engines
 with an explicit `dateFormat`, since the default "system" format depends on
--- a/ARCHITECTURE.ru.md
+++ b/ARCHITECTURE.ru.md
@ -24,13 +24,16 @@ src/
    editor.ts        обвязка CodeMirror 6: подсветка, оверлей результатов, копирование
    search.ts        оверлей поиска по всем листам (текст + запросы по значению)
    export.ts        рендерит лист + результаты в PNG (буфер обмена/файл)
+    sparkline.ts     рендер SVG-спарклайна для результатов `chart`
    app.css          темы (светлая/тёмная через CSS-переменные)
  main.ts            запуск приложения: документы, настройки, строка статуса, dnd
+  workspace.ts       межлистовые ссылки: кэш экспортов, обнаружение циклов
  storage.ts         команды Tauri / запасной вариант на localStorage
  extensions.ts      запускает пользовательские .js-файлы в песочнице
                     QuickJS/WASM, мост к API numi.* движка
  i18n.ts            строки интерфейса (en/ru)
  updater.ts         проверка tauri-plugin-updater, установка + перезапуск
+  logger.ts          тонкая обёртка над console (info/warn/error)
 src-tauri/
  src/main.rs        трей, скрытие в трей, команды хранилища, загрузка курсов
                     (open.er-api.com + CoinGecko + Yahoo Finance v8 chart)
@ -304,7 +307,7 @@ src-tauri/

 ## Тесты

-`npm test` запускает 259 vitest-кейсов: `src/engine/*.test.ts` покрывает все
+`npm test` запускает 373 vitest-кейса в 21 файле: `src/engine/*.test.ts` покрывает все
 классы выражений, оба языка, детерминированные инжектированные курсы, поиск
 неизвестного, исторические курсы (инжектированные), литералы и отображение
 форматов дат (отдельные движки с явным `dateFormat` — формат «system» по
--- a/README.md
+++ b/README.md
@ -169,7 +169,7 @@ see [ARCHITECTURE.md](ARCHITECTURE.md).

 ```bash
 npm install
-npm test               # engine tests (259 cases)
+npm test               # engine tests (373 cases)
 npm run tauri dev      # run the app
 npm run tauri build    # build the installer
 ```
--- a/README.ru.md
+++ b/README.ru.md
@ -165,7 +165,7 @@ numi.addFunction({ id: "гипот", phrases: "гипот" },

 ```bash
 npm install
-npm test               # тесты движка (259 кейсов)
+npm test               # тесты движка (373 кейса)
 npm run tauri dev      # запустить приложение
 npm run tauri build    # собрать установщик
 ```
--- a/package-lock.json
+++ b/package-lock.json
@ -1,12 +1,12 @@
 {
  "name": "summarum",
-  "version": "1.2.8",
+  "version": "1.2.9",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "summarum",
-      "version": "1.2.8",
+      "version": "1.2.9",
      "dependencies": {
        "@codemirror/autocomplete": "^6.18.0",
        "@codemirror/commands": "^6.8.0",
--- a/package.json
+++ b/package.json
@ -1,7 +1,7 @@
 {
  "name": "summarum",
  "private": true,
-  "version": "1.2.8",
+  "version": "1.2.9",
  "description": "Summarum — natural language calculator notebook",
  "type": "module",
  "scripts": {
--- a/src-tauri/Cargo.lock
+++ b/src-tauri/Cargo.lock
@ -3727,7 +3727,7 @@ checksum = "13c2bddecc57b384dee18652358fb23172facb8a2c51ccc10d74c157bdea3292"

 [[package]]
 name = "summarum"
-version = "1.2.8"
+version = "1.2.9"
 dependencies = [
 "chrono",
 "futures",
--- a/src-tauri/Cargo.toml
+++ b/src-tauri/Cargo.toml
@ -1,6 +1,6 @@
 [package]
 name = "summarum"
-version = "1.2.8"
+version = "1.2.9"
 description = "Summarum — natural language calculator notebook"
 edition = "2021"

--- a/src-tauri/src/main.rs
+++ b/src-tauri/src/main.rs
@ -46,7 +46,25 @@ struct DataDirGate {
 }

 fn canon_or_raw(p: &Path) -> PathBuf {
-    fs::canonicalize(p).unwrap_or_else(|_| p.to_path_buf())
+    let mut normalized = PathBuf::new();
+    for component in p.components() {
+        match component {
+            std::path::Component::ParentDir => {
+                let can_pop = matches!(
+                    normalized.components().next_back(),
+                    Some(std::path::Component::Normal(_))
+                );
+                if can_pop {
+                    normalized.pop();
+                } else if !normalized.has_root() {
+                    normalized.push(component);
+                }
+            }
+            std::path::Component::CurDir => {}
+            _ => normalized.push(component),
+        }
+    }
+    normalized
 }

 /// Exact match against an authorized folder, compared canonicalized so a
@ -565,11 +583,7 @@ async fn fetch_historical_rates(
    // api.frankfurter.app 301-redirects here now, and the old domain is
    // flaky over reqwest/rustls-tls — go straight to the stable host
    let url = format!("https://api.frankfurter.dev/v1/{}?from=USD", date);
-    let resp = client
-        .get(&url)
-        .send()
-        .await
-        .map_err(|e| e.to_string())?;
+    let resp = client.get(&url).send().await.map_err(|e| e.to_string())?;

    let bytes = read_body_capped(resp, RATES_RESPONSE_LIMIT).await?;
    let body: serde_json::Value = serde_json::from_slice(&bytes).map_err(|e| e.to_string())?;
@ -628,7 +642,8 @@ async fn fetch_historical_rates_batch(
                    if let Ok(body) = serde_json::from_slice::<serde_json::Value>(&bytes) {
                        if let Some(rates_obj) = body["rates"].as_object() {
                            let daily_rates = parse_rate_map(rates_obj);
-                            let cache_path = data_dir(&app_clone).join(format!("rates-{}.json", date));
+                            let cache_path =
+                                data_dir(&app_clone).join(format!("rates-{}.json", date));
                            if let Ok(serialized) = serde_json::to_string(&daily_rates) {
                                write_atomic_async(cache_path, serialized).await;
                            }
--- a/src-tauri/tauri.conf.json
+++ b/src-tauri/tauri.conf.json
@ -1,7 +1,7 @@
 {
  "$schema": "https://schema.tauri.app/config/2",
  "productName": "Summarum",
-  "version": "1.2.8",
+  "version": "1.2.9",
  "identifier": "app.summarum.calc",
  "build": {
    "beforeDevCommand": "npm run dev",
--- a/src/engine/edge.test.ts
+++ b/src/engine/edge.test.ts
@ -13,6 +13,10 @@ function calc(expr: string): string | null {
  return r[r.length - 1].text;
 }

+function evaluateText(doc: string): (string | null)[] {
+  return eng.evaluateDocument(doc).map((x) => x.text);
+}
+
 describe("edge cases", () => {
  it("russian mixed sentence", () => {
    expect(calc("потратил 20$ и ещё 5$")).toBe("$25");
@ -45,11 +49,11 @@ describe("edge cases", () => {
    expect(calc("hello world")).toBe(null);
  });
  it("sum stops at header", () => {
-    const r = eng.evaluateDocument("5\n# section\n10\n20\nsum").map((x) => x.text);
+    const r = evaluateText("5\n# section\n10\n20\nsum");
    expect(r).toEqual(["5", null, "10", "20", "30"]);
  });
  it("variables with units survive math", () => {
-    const r = eng.evaluateDocument("rent = $500\nfood = $200\nrent + food").map((x) => x.text);
+    const r = evaluateText("rent = $500\nfood = $200\nrent + food");
    expect(r).toEqual(["$500", "$200", "$700"]);
  });
  it("big numbers with grouping", () => {
@ -145,7 +149,7 @@ describe("crypto", () => {

 describe("regressions", () => {
  it("a broken line does not kill the document (BigInt from NaN)", () => {
-    const r = eng.evaluateDocument("2+2\nasin(5) & 3\n3+3").map((x) => x.text);
+    const r = evaluateText("2+2\nasin(5) & 3\n3+3");
    expect(r).toEqual(["4", null, "6"]);
  });
  it("non-finite results are suppressed", () => {
@ -178,8 +182,8 @@ describe("regressions", () => {
    expect(calc("1,234 + 0")).toBe("1,234"); // exactly 3 digits = thousands
  });
  it("single-letter unit names can be variables", () => {
-    expect(eng.evaluateDocument("m = 5\nm * 2").map((x) => x.text)).toEqual(["5", "10"]);
-    expect(eng.evaluateDocument("t = 100\nt + 20%").map((x) => x.text)).toEqual(["100", "120"]);
+    expect(evaluateText("m = 5\nm * 2")).toEqual(["5", "10"]);
+    expect(evaluateText("t = 100\nt + 20%")).toEqual(["100", "120"]);
  });
  it("tiny conversion results show significant digits, not 0", () => {
    expect(calc("1 mm in km")).toBe("0.000001 km");
@ -199,7 +203,7 @@ describe("regressions", () => {
    expect(calc("4 ^ 50%")).toBe("2");
  });
  it("avg skips incompatible lines in the denominator", () => {
-    expect(eng.evaluateDocument("10 kg\n20 kg\n5 hours\navg").map((x) => x.text)).toEqual(["10 kg", "20 kg", "5 h", "15 kg"]);
+    expect(evaluateText("10 kg\n20 kg\n5 hours\navg")).toEqual(["10 kg", "20 kg", "5 h", "15 kg"]);
  });
  it("calendar month add clamps to month end", () => {
    const doc = eng.evaluateDocument("today + 1 month");
@ -286,7 +290,7 @@ describe("review fixes", () => {
 describe("regression 2026-08-12", () => {
  it("a deeply nested-parens line nulls out just that line, not the whole document", () => {
    const deep = "(".repeat(50000) + "1" + ")".repeat(50000);
-    const r = eng.evaluateDocument(`1+1\n${deep}\n2+2`).map((x) => x.text);
+    const r = evaluateText(`1+1\n${deep}\n2+2`);
    expect(r[0]).toBe("2");
    expect(r[1]).toBeNull();
    expect(r[2]).toBe("4");
@ -297,9 +301,9 @@ describe("regression 2026-08-12", () => {
    expect(calc("5 мин")).toBe("5 min");
  });
  it("standalone 'min'/'max' aggregate lines still work", () => {
-    const r = eng.evaluateDocument("10\n20\n5\nmin").map((x) => x.text);
+    const r = evaluateText("10\n20\n5\nmin");
    expect(r).toEqual(["10", "20", "5", "5"]);
-    const r2 = eng.evaluateDocument("10\n20\n5\nmax").map((x) => x.text);
+    const r2 = evaluateText("10\n20\n5\nmax");
    expect(r2).toEqual(["10", "20", "5", "20"]);
  });

--- a/src/engine/evaluator.ts
+++ b/src/engine/evaluator.ts
@ -1,9 +1,14 @@
 // Walks the AST with the document context (variables, line results for
 // sum/avg/prev) and produces unit-aware values.
-import { Decimal, EvalError, PI, Quantity, Unit, Value, XRefError, qty, pct } from "./types";
+import { Decimal, DEC_ZERO, DEC_ONE, EvalError, PI, Quantity, Unit, Value, XRefError, qty, pct } from "./types";
 import { Node, ConvTarget } from "./parser";
 import { Registry } from "./registry";
-import { resolveZone, startOfToday, addToDate, isCalendarUnit } from "./datetime";
+import {
+  resolveZone,
+  startOfToday,
+  addToDate,
+  isCalendarUnit,
+} from "./datetime";

 export interface LineCtx {
  /** values of lines above (null = no result) */
@ -25,7 +30,9 @@ export interface EvalCtx {
  resolveXRef?: XRefResolver;
 }

-export type XRefResolution = { ok: true; value: Value } | { ok: false; reason: string };
+export type XRefResolution =
+  | { ok: true; value: Value }
+  | { ok: false; reason: string };
 export type XRefResolver = (sheet: string, key: string) => XRefResolution;

 const E = new Decimal("2.71828182845904523536028747135266249775724709369995");
@ -57,7 +64,12 @@ export function evaluate(node: Node, ctx: EvalCtx): Value {
    case "curr":
      return evaluateUnitMod(node, ctx);
    case "bin":
-      return evalBin(node.op, evaluate(node.l, ctx), evaluate(node.r, ctx), ctx);
+      return evalBin(
+        node.op,
+        evaluate(node.l, ctx),
+        evaluate(node.r, ctx),
+        ctx,
+      );
    case "bit":
      return evalBit(node.op, evaluate(node.l, ctx), evaluate(node.r, ctx));
    case "pctop":
@ -65,7 +77,11 @@ export function evaluate(node: Node, ctx: EvalCtx): Value {
    case "conv":
      return evalConv(evaluate(node.x, ctx), node.target, ctx);
    case "call":
-      return evalCall(node.name, node.args.map((a) => evaluate(a, ctx)), ctx);
+      return evalCall(
+        node.name,
+        node.args.map((a) => evaluate(a, ctx)),
+        ctx,
+      );
    case "seq":
      return evaluateSeq(node, ctx);
  }
@ -112,7 +128,8 @@ export function fromBase(base: Decimal, unit: Unit): Decimal {

 export function convertQ(q: Quantity, unit: Unit): Quantity {
  if (!q.unit) return { ...q, unit };
-  if (q.unit.dimension !== unit.dimension) throw new EvalError("dimension mismatch");
+  if (q.unit.dimension !== unit.dimension)
+    throw new EvalError("dimension mismatch");
  return qty(fromBase(toBase(q), unit), unit);
 }

@ -122,36 +139,52 @@ function addQ(a: Quantity, b: Quantity): Quantity {

 function numericAdd(a: Quantity, b: Quantity, sign: 1 | -1): Quantity {
  if (a.unit && b.unit) {
-    if (a.unit.dimension !== b.unit.dimension) throw new EvalError("dimension mismatch");
+    if (a.unit.dimension !== b.unit.dimension)
+      throw new EvalError("dimension mismatch");
    if (a.unit.offset || b.unit.offset) {
      // temperatures: operate in the left unit's scale
      const bInA = convertQ(b, a.unit);
-      return qty(sign === 1 ? a.value.add(bInA.value) : a.value.sub(bInA.value), a.unit);
+      return qty(
+        sign === 1 ? a.value.add(bInA.value) : a.value.sub(bInA.value),
+        a.unit,
+      );
    }
-    const base = sign === 1 ? toBase(a).add(toBase(b)) : toBase(a).sub(toBase(b));
+    const base =
+      sign === 1 ? toBase(a).add(toBase(b)) : toBase(a).sub(toBase(b));
    return qty(fromBase(base, a.unit), a.unit);
  }
  const unit = a.unit ?? b.unit ?? null;
  return qty(sign === 1 ? a.value.add(b.value) : a.value.sub(b.value), unit);
 }

-function evalPercentArith(op: "plus" | "minus" | "mul" | "div" | "mod" | "pow", l: Value, r: Value): Value {
+function evalPercentArith(
+  op: "plus" | "minus" | "mul" | "div" | "mod" | "pow",
+  l: Value,
+  r: Value,
+): Value {
  if (l.kind === "percent" && r.kind === "percent") {
    switch (op) {
-      case "plus": return pct(l.value.add(r.value));
-      case "minus": return pct(l.value.sub(r.value));
-      case "mul": return pct(l.value.mul(r.value).div(100));
-      case "div": return qty(l.value.div(r.value));
-      default: throw new EvalError("bad percent op");
+      case "plus":
+        return pct(l.value.add(r.value));
+      case "minus":
+        return pct(l.value.sub(r.value));
+      case "mul":
+        return pct(l.value.mul(r.value).div(100));
+      case "div":
+        return qty(l.value.div(r.value));
+      default:
+        throw new EvalError("bad percent op");
    }
  }
  const q = (l.kind === "quantity" ? l : r) as Quantity;
-  const p = (l.kind === "percent" ? l : r as { kind: "percent"; value: Decimal }).value;
+  const p = (
+    l.kind === "percent" ? l : (r as { kind: "percent"; value: Decimal })
+  ).value;
  switch (op) {
-    case "plus": return qty(q.value.mul(new Decimal(1).add(p.div(100))), q.unit);
+    case "plus": return qty(q.value.mul(DEC_ONE.add(p.div(100))), q.unit);
    case "minus":
      if (l.kind === "percent") throw new EvalError("percent minus number");
-      return qty(q.value.mul(new Decimal(1).sub(p.div(100))), q.unit);
+      return qty(q.value.mul(DEC_ONE.sub(p.div(100))), q.unit);
    case "mul": return qty(q.value.mul(p).div(100), q.unit);
    case "div":
      if (l.kind === "percent") throw new EvalError("percent div number");
@ -161,14 +194,22 @@ function evalPercentArith(op: "plus" | "minus" | "mul" | "div" | "mod" | "pow",
      return l.kind === "percent"
        ? qty(p.div(100).pow(q.value))
        : qty(q.value.pow(p.div(100)), q.unit);
-    default: throw new EvalError("bad percent op");
+    default:
+      throw new EvalError("bad percent op");
  }
 }

-function evalQuantityArith(op: "plus" | "minus" | "mul" | "div" | "mod" | "pow", a: Quantity, b: Quantity, ctx: EvalCtx): Value {
+function evalQuantityArith(
+  op: "plus" | "minus" | "mul" | "div" | "mod" | "pow",
+  a: Quantity,
+  b: Quantity,
+  ctx: EvalCtx,
+): Value {
  switch (op) {
-    case "plus": return numericAdd(a, b, 1);
-    case "minus": return numericAdd(a, b, -1);
+    case "plus":
+      return numericAdd(a, b, 1);
+    case "minus":
+      return numericAdd(a, b, -1);
    case "mul": {
      if (a.unit && b.unit) {
        const da = a.unit.dimension;
@ -183,7 +224,8 @@ function evalQuantityArith(op: "plus" | "minus" | "mul" | "div" | "mod" | "pow",
          if (u) return qty(baseProduct.div(u.ratio), u);
        }
        // same dimension: "2 kg * 500 g" scales in the left unit, not 2*500
-        if (da === db) return qty(a.value.mul(convertQ(b, a.unit).value), a.unit);
+        if (da === db)
+          return qty(a.value.mul(convertQ(b, a.unit).value), a.unit);
        return qty(a.value.mul(b.value), a.unit);
      }
      return qty(a.value.mul(b.value), a.unit ?? b.unit ?? null);
@ -202,16 +244,28 @@ function evalQuantityArith(op: "plus" | "minus" | "mul" | "div" | "mod" | "pow",
    case "pow": {
      const result = a.value.pow(b.value);
      if (a.unit?.dimension === "length" && !b.unit) {
-        const id = b.value.eq(2) ? `sq:${a.unit.id}` : b.value.eq(3) ? `cb:${a.unit.id}` : null;
+        const id = b.value.eq(2)
+          ? `sq:${a.unit.id}`
+          : b.value.eq(3)
+            ? `cb:${a.unit.id}`
+            : null;
        const u = id ? ctx.reg.unitsById.get(id) : null;
        if (u) return qty(result, u);
      }
-      return qty(result, b.unit ? null : a.unit && b.value.eq(1) ? a.unit : null);
+      return qty(
+        result,
+        b.unit ? null : a.unit && b.value.eq(1) ? a.unit : null,
+      );
    }
  }
 }

-function evalBin(op: "plus" | "minus" | "mul" | "div" | "mod" | "pow", l: Value, r: Value, ctx: EvalCtx): Value {
+function evalBin(
+  op: "plus" | "minus" | "mul" | "div" | "mod" | "pow",
+  l: Value,
+  r: Value,
+  ctx: EvalCtx,
+): Value {
  if (l.kind === "date" || r.kind === "date") {
    return evalDateArith(op, l, r);
  }
@ -224,19 +278,33 @@ function evalBin(op: "plus" | "minus" | "mul" | "div" | "mod" | "pow", l: Value,
 }

 function evalBit(op: string, l: Value, r: Value): Value {
-  if (l.kind !== "quantity" || r.kind !== "quantity") throw new EvalError("bitwise needs integers");
-  if (!l.value.isFinite() || !r.value.isFinite()) throw new EvalError("bitwise needs finite integers");
+  if (l.kind !== "quantity" || r.kind !== "quantity")
+    throw new EvalError("bitwise needs integers");
+  if (!l.value.isFinite() || !r.value.isFinite())
+    throw new EvalError("bitwise needs finite integers");
  const a = BigInt(l.value.toDecimalPlaces(0).toFixed(0));
  const b = BigInt(r.value.toDecimalPlaces(0).toFixed(0));
-  if ((op === "shl" || op === "shr") && (b < 0n || b > 256n)) throw new EvalError("bad shift");
+  if ((op === "shl" || op === "shr") && (b < 0n || b > 256n))
+    throw new EvalError("bad shift");
  let out: bigint;
  switch (op) {
-    case "band": out = a & b; break;
-    case "bor": out = a | b; break;
-    case "bxor": out = a ^ b; break;
-    case "shl": out = a << b; break;
-    case "shr": out = a >> b; break;
-    default: throw new EvalError("bad bit op");
+    case "band":
+      out = a & b;
+      break;
+    case "bor":
+      out = a | b;
+      break;
+    case "bxor":
+      out = a ^ b;
+      break;
+    case "shl":
+      out = a << b;
+      break;
+    case "shr":
+      out = a >> b;
+      break;
+    default:
+      throw new EvalError("bad bit op");
  }
  const repr = l.repr !== "decimal" ? l.repr : r.repr;
  return qty(new Decimal(out.toString()), null, repr);
@ -257,8 +325,8 @@ function evalPctOp(op: string, l: Value, r: Value): Value {
    const p = asPercentValue(l);
    const factor =
      op === "of" ? p.div(100)
-      : op === "off" ? new Decimal(1).sub(p.div(100))
-      : new Decimal(1).add(p.div(100));
+      : op === "off" ? DEC_ONE.sub(p.div(100))
+      : DEC_ONE.add(p.div(100));
    // a percent of a percent stays a percent: 50% of 50% = 25%
    if (r.kind === "percent") return pct(r.value.mul(factor));
    return qty(rv.mul(factor), unit);
@ -268,20 +336,21 @@ function evalPctOp(op: string, l: Value, r: Value): Value {
    if (rv.isZero()) throw new EvalError("division by zero");
    switch (op) {
      case "as_pct_of": return pct(lv.div(rv).mul(100));
-      case "as_pct_off": return pct(new Decimal(1).sub(lv.div(rv)).mul(100));
+      case "as_pct_off": return pct(DEC_ONE.sub(lv.div(rv)).mul(100));
      case "as_pct_on": return pct(lv.div(rv).sub(1).mul(100));
    }
  }
  // "20% of what is 30"
  const p = asPercentValue(l);
  switch (op) {
-    case "of_what_is": return qty(rv.div(p.div(100)), unit);
+    case "of_what_is":
+      return qty(rv.div(p.div(100)), unit);
    case "off_what_is": {
-      const d = new Decimal(1).sub(p.div(100));
+      const d = DEC_ONE.sub(p.div(100));
      if (d.isZero()) throw new EvalError("division by zero");
      return qty(rv.div(d), unit);
    }
-    case "on_what_is": return qty(rv.div(new Decimal(1).add(p.div(100))), unit);
+    case "on_what_is": return qty(rv.div(DEC_ONE.add(p.div(100))), unit);
  }
  throw new EvalError(`bad percent op ${op}`);
 }
@ -290,7 +359,8 @@ function evalConv(v: Value, target: ConvTarget, ctx: EvalCtx): Value {
  switch (target.type) {
    case "unit": {
      if (v.kind === "percent") return pct(v.value); // "x in %" — keep
-      if (v.kind !== "quantity") throw new EvalError("cannot convert date to unit");
+      if (v.kind !== "quantity")
+        throw new EvalError("cannot convert date to unit");
      if (!v.unit) return qty(v.value, target.unit);
      return convertQ(v, target.unit);
    }
@ -299,13 +369,17 @@ function evalConv(v: Value, target: ConvTarget, ctx: EvalCtx): Value {
      if (target.onDate) {
        const dateRates = ctx.historicalRates?.get(target.onDate);
        const rate = dateRates?.get(target.code);
-        if (rate === undefined) throw new EvalError(`no historical rate for ${target.code} on ${target.onDate}`);
+        if (rate === undefined)
+          throw new EvalError(
+            `no historical rate for ${target.code} on ${target.onDate}`,
+          );
        unit = ctx.reg.makeCurrencyUnitFromRate(target.code, new Decimal(rate));
      } else {
        unit = ctx.reg.makeCurrencyUnit(target.code);
        if (!unit) throw new EvalError(`no rate for ${target.code}`);
      }
-      if (v.kind !== "quantity") throw new EvalError("cannot convert to currency");
+      if (v.kind !== "quantity")
+        throw new EvalError("cannot convert to currency");
      if (!v.unit) return qty(v.value, unit);
      return convertQ(v, unit);
    }
@ -324,13 +398,17 @@ function evalConv(v: Value, target: ConvTarget, ctx: EvalCtx): Value {
      return { ...v, timeZone: zone };
    }
    case "unix": {
-      if (v.kind === "date") return qty(new Decimal(v.ms).div(1000).floor(), null, "plain");
+      if (v.kind === "date")
+        return qty(new Decimal(v.ms).div(1000).floor(), null, "plain");
      throw new EvalError("unix needs a date");
    }
    case "todate": {
-      if (v.kind !== "quantity" || v.unit) throw new EvalError("date needs a plain number");
+      if (v.kind !== "quantity" || v.unit)
+        throw new EvalError("date needs a plain number");
      // heuristics: > 1e12 means milliseconds, else seconds
-      const ms = v.value.gt(1e12) ? v.value.toNumber() : v.value.mul(1000).toNumber();
+      const ms = v.value.gt(1e12)
+        ? v.value.toNumber()
+        : v.value.mul(1000).toNumber();
      return { kind: "date", ms, hasTime: true };
    }
  }
@ -338,7 +416,8 @@ function evalConv(v: Value, target: ConvTarget, ctx: EvalCtx): Value {

 function evalDateWord(word: string): Value {
  switch (word) {
-    case "today": return { kind: "date", ms: startOfToday(), hasTime: false };
+    case "today":
+      return { kind: "date", ms: startOfToday(), hasTime: false };
    case "tomorrow": {
      const d = new Date(startOfToday());
      d.setDate(d.getDate() + 1);
@ -349,9 +428,13 @@ function evalDateWord(word: string): Value {
      d.setDate(d.getDate() - 1);
      return { kind: "date", ms: d.getTime(), hasTime: false };
    }
-    case "now": return { kind: "date", ms: Date.now(), hasTime: true };
-    case "time": case "local": return { kind: "date", ms: Date.now(), hasTime: true, timeOnly: true };
-    default: throw new EvalError(`bad date word ${word}`);
+    case "now":
+      return { kind: "date", ms: Date.now(), hasTime: true };
+    case "time":
+    case "local":
+      return { kind: "date", ms: Date.now(), hasTime: true, timeOnly: true };
+    default:
+      throw new EvalError(`bad date word ${word}`);
  }
 }

@ -359,10 +442,16 @@ function evalDateArith(op: string, l: Value, r: Value): Value {
  if (l.kind === "date" && r.kind === "date") {
    if (op !== "minus") throw new EvalError("dates only subtract");
    // midnight-to-midnight differences count calendar days (robust across DST)
-    const days = !l.hasTime && !r.hasTime
-      ? new Decimal(Math.round((l.ms - r.ms) / 86400_000))
-      : new Decimal(l.ms - r.ms).div(86400_000);
-    return qty(days, { id: "day", dimension: "time", ratio: new Decimal(86400), format: "day" });
+    const days =
+      !l.hasTime && !r.hasTime
+        ? new Decimal(Math.round((l.ms - r.ms) / 86400_000))
+        : new Decimal(l.ms - r.ms).div(86400_000);
+    return qty(days, {
+      id: "day",
+      dimension: "time",
+      ratio: new Decimal(86400),
+      format: "day",
+    });
  }
  const date = (l.kind === "date" ? l : r) as Extract<Value, { kind: "date" }>;
  const span = l.kind === "date" ? r : l;
@ -370,7 +459,8 @@ function evalDateArith(op: string, l: Value, r: Value): Value {
    throw new EvalError("date arithmetic needs a time span");
  }
  if (op !== "plus" && op !== "minus") throw new EvalError("bad date op");
-  if (op === "minus" && l.kind !== "date") throw new EvalError("cannot subtract date from number");
+  if (op === "minus" && l.kind !== "date")
+    throw new EvalError("cannot subtract date from number");
  const amount = span.value.toNumber() * (op === "minus" ? -1 : 1);
  let ms: number;
  let hasTime = date.hasTime;
@ -392,23 +482,28 @@ function evalGoalSeek(lhsNode: Node, rhsNode: Node, ctx: EvalCtx): Value {
    const innerCtx: EvalCtx = { ...ctx, vars };
    const lv = evaluate(lhsNode, innerCtx);
    const rv = evaluate(rhsNode, innerCtx);
-    const toD = (v: Value) => v.kind === "quantity" ? toBase(v) : new Decimal(0);
+    const toD = (v: Value) => v.kind === "quantity" ? toBase(v) : DEC_ZERO;
    return toD(lv).minus(toD(rv));
  };

  const safeEval = (x: Decimal): Decimal | null => {
-    try { return evalF(x); } catch { return null; }
+    try {
+      return evalF(x);
+    } catch {
+      return null;
+    }
  };

-  const f0 = safeEval(new Decimal(0));
-  const f1 = safeEval(new Decimal(1));
+  const f0 = safeEval(DEC_ZERO);
+  const f1 = safeEval(DEC_ONE);

  if (f0 !== null && f1 !== null) {
    const slope = f1.minus(f0);
    if (!slope.isZero()) {
      const root = f0.neg().div(slope);
      const fRoot = safeEval(root);
-      if (fRoot !== null && fRoot.abs().lt(new Decimal("1e-9"))) return qty(root);
+      if (fRoot !== null && fRoot.abs().lt(new Decimal("1e-9")))
+        return qty(root);
    }
  }

@ -417,20 +512,33 @@ function evalGoalSeek(lhsNode: Node, rhsNode: Node, ctx: EvalCtx): Value {
  let hi = new Decimal(1e9);
  let flo = safeEval(lo);
  let fhi = safeEval(hi);
-  
+
  if (flo === null || fhi === null || flo.mul(fhi).gt(0)) {
-    const probes = [1, 2, 5, 10, 100, 1000, 10000, -1, -2, -5, -10, -100, -1000, -10000];
+    const probes = [
+      1, 2, 5, 10, 100, 1000, 10000, -1, -2, -5, -10, -100, -1000, -10000,
+    ];
    let found = false;
    for (const p of probes) {
      const pDec = new Decimal(p);
      const fp = safeEval(pDec);
      if (fp === null) continue;
-      if (flo === null) { lo = pDec; flo = fp; }
-      else if (fhi === null) { hi = pDec; fhi = fp; }
-      else if (flo.mul(fp).lte(0)) { hi = pDec; fhi = fp; }
-      else if (fhi.mul(fp).lte(0)) { lo = pDec; flo = fp; }
-      else continue;
-      if (flo !== null && fhi !== null && flo.mul(fhi).lte(0)) { found = true; break; }
+      if (flo === null) {
+        lo = pDec;
+        flo = fp;
+      } else if (fhi === null) {
+        hi = pDec;
+        fhi = fp;
+      } else if (flo.mul(fp).lte(0)) {
+        hi = pDec;
+        fhi = fp;
+      } else if (fhi.mul(fp).lte(0)) {
+        lo = pDec;
+        flo = fp;
+      } else continue;
+      if (flo !== null && fhi !== null && flo.mul(fhi).lte(0)) {
+        found = true;
+        break;
+      }
    }
    if (!found) throw new EvalError("no solution");
  }
@ -440,11 +548,16 @@ function evalGoalSeek(lhsNode: Node, rhsNode: Node, ctx: EvalCtx): Value {
    if (hi.minus(lo).abs().lt(new Decimal("1e-10"))) return qty(mid);
    const fm = safeEval(mid);
    if (fm === null) {
-      lo = mid.plus("1e-9"); 
+      lo = mid.plus("1e-9");
      continue;
    }
-    if (flo!.mul(fm).lte(0)) { hi = mid; fhi = fm; }
-    else { lo = mid; flo = fm; }
+    if (flo!.mul(fm).lte(0)) {
+      hi = mid;
+      fhi = fm;
+    } else {
+      lo = mid;
+      flo = fm;
+    }
  }
  return qty(lo.plus(hi).div(2));
 }
@ -456,7 +569,10 @@ function filterSameDimension(block: Quantity[]): Quantity[] {
 }

 /** Adds compatible lines left to right, silently skipping ones with an incompatible dimension. */
-function reduceCompatible(block: Quantity[]): { acc: Quantity; counted: number } {
+function reduceCompatible(block: Quantity[]): {
+  acc: Quantity;
+  counted: number;
+} {
  let acc = block[0];
  let counted = 1;
  for (let i = 1; i < block.length; i++) {
@ -474,7 +590,8 @@ const AGG_FUNCS: Record<string, (block: Quantity[]) => Value> = {
  count: (block) => qty(new Decimal(block.length)),
  chart: (block) => {
    const compatible = filterSameDimension(block);
-    if (compatible.length < 2) throw new EvalError("need at least 2 values for chart");
+    if (compatible.length < 2)
+      throw new EvalError("need at least 2 values for chart");
    return {
      kind: "chart",
      points: compatible.map((q) => toBase(q)),
@ -483,12 +600,12 @@ const AGG_FUNCS: Record<string, (block: Quantity[]) => Value> = {
  },
  min: (block) => filterSameDimension(block).reduce((best, q) => toBase(q).lt(toBase(best)) ? q : best),
  max: (block) => filterSameDimension(block).reduce((best, q) => toBase(q).gt(toBase(best)) ? q : best),
-  product: (block) => qty(block.reduce((acc, q) => acc.mul(q.value), new Decimal(1))),
+  product: (block) => qty(block.reduce((acc, q) => acc.mul(q.value), DEC_ONE)),
  sum: (block) => reduceCompatible(block).acc,
  avg: (block) => {
    const { acc, counted } = reduceCompatible(block);
    return qty(acc.value.div(counted), acc.unit);
-  }
+  },
 };

 function getPrevResult(ctx: EvalCtx): Value {
@ -517,7 +634,10 @@ function getAggBlock(ctx: EvalCtx): Quantity[] {
  return block;
 }

-function evalAgg(name: "sum" | "avg" | "prev" | "count" | "min" | "max" | "product" | "chart", ctx: EvalCtx): Value {
+function evalAgg(
+  name: "sum" | "avg" | "prev" | "count" | "min" | "max" | "product" | "chart",
+  ctx: EvalCtx,
+): Value {
  if (name === "prev") return getPrevResult(ctx);
  const block = getAggBlock(ctx);
  const func = AGG_FUNCS[name];
@ -525,6 +645,80 @@ function evalAgg(name: "sum" | "avg" | "prev" | "count" | "min" | "max" | "produ
  return func(block);
 }

+const angleArg = (x: Value): Decimal => {
+  if (x.kind === "quantity" && x.unit?.dimension === "angle") {
+    return x.value.mul(x.unit.ratio);
+  }
+  return asScalar(x);
+};
+
+const BUILTIN_FUNCS: Record<string, (x: Value, ctx: EvalCtx) => Value> = {
+  sqrt: (x, ctx) => {
+    if (
+      x.kind === "quantity" &&
+      x.unit?.dimension === "area" &&
+      x.unit.id.startsWith("sq:")
+    ) {
+      const base = ctx.reg.unitsById.get(x.unit.id.slice(3));
+      if (base) return qty(x.value.sqrt(), base);
+    }
+    return qty(asScalar(x).sqrt());
+  },
+  cbrt: (x) => qty(asScalar(x).cbrt()),
+  sin: (x) => qty(Decimal.sin(angleArg(x))),
+  cos: (x) => qty(Decimal.cos(angleArg(x))),
+  tan: (x) => qty(Decimal.tan(angleArg(x))),
+  cot: (x) => qty(DEC_ONE.div(Decimal.tan(angleArg(x)))),
+  asin: (x) => qty(Decimal.asin(asScalar(x))),
+  arcsin: (x) => qty(Decimal.asin(asScalar(x))),
+  acos: (x) => qty(Decimal.acos(asScalar(x))),
+  arccos: (x) => qty(Decimal.acos(asScalar(x))),
+  atan: (x) => qty(Decimal.atan(asScalar(x))),
+  arctan: (x) => qty(Decimal.atan(asScalar(x))),
+  sinh: (x) => qty(Decimal.sinh(asScalar(x))),
+  cosh: (x) => qty(Decimal.cosh(asScalar(x))),
+  tanh: (x) => qty(Decimal.tanh(asScalar(x))),
+  ln: (x) => qty(Decimal.ln(asScalar(x))),
+  lg: (x) => qty(Decimal.log10(asScalar(x))),
+  log: (x) => qty(Decimal.log10(asScalar(x))),
+  log2: (x) => qty(Decimal.log2(asScalar(x))),
+  exp: (x) => qty(Decimal.exp(asScalar(x))),
+  abs: (x) =>
+    x.kind === "quantity"
+      ? { ...x, value: x.value.abs() }
+      : qty(asScalar(x).abs()),
+  round: (x) =>
+    x.kind === "quantity"
+      ? { ...x, value: x.value.round() }
+      : qty(asScalar(x).round()),
+  ceil: (x) =>
+    x.kind === "quantity"
+      ? { ...x, value: x.value.ceil() }
+      : qty(asScalar(x).ceil()),
+  floor: (x) =>
+    x.kind === "quantity"
+      ? { ...x, value: x.value.floor() }
+      : qty(asScalar(x).floor()),
+  fact: (x) => qty(factorial(asScalar(x))),
+  factorial: (x) => qty(factorial(asScalar(x))),
+  until: (x) => {
+    if (x.kind !== "date") throw new EvalError("until needs a date");
+    return evalDateArith("minus", x, {
+      kind: "date",
+      ms: startOfToday(),
+      hasTime: false,
+    });
+  },
+  since: (x) => {
+    if (x.kind !== "date") throw new EvalError("since needs a date");
+    return evalDateArith(
+      "minus",
+      { kind: "date", ms: startOfToday(), hasTime: false },
+      x,
+    );
+  },
+};
+
 function evalCall(name: string, args: Value[], ctx: EvalCtx): Value {
  const custom = ctx.reg.customFuncs.get(name);
  if (custom) return custom(args);
@ -533,53 +727,9 @@ function evalCall(name: string, args: Value[], ctx: EvalCtx): Value {
  const x = args[0];
  if (!x) throw new EvalError(`${name} needs an argument`);

-  // trig works on angles: degrees convert to radians
-  const angleArg = (): Decimal => {
-    if (x.kind === "quantity" && x.unit?.dimension === "angle") {
-      return x.value.mul(x.unit.ratio);
-    }
-    return asScalar(x);
-  };
-  const n = () => asScalar(x);
-
-  switch (name) {
-    case "sqrt": {
-      if (x.kind === "quantity" && x.unit?.dimension === "area" && x.unit.id.startsWith("sq:")) {
-        const base = ctx.reg.unitsById.get(x.unit.id.slice(3));
-        if (base) return qty(x.value.sqrt(), base);
-      }
-      return qty(n().sqrt());
-    }
-    case "cbrt": return qty(n().cbrt());
-    case "sin": return qty(Decimal.sin(angleArg()));
-    case "cos": return qty(Decimal.cos(angleArg()));
-    case "tan": return qty(Decimal.tan(angleArg()));
-    case "cot": return qty(new Decimal(1).div(Decimal.tan(angleArg())));
-    case "asin": case "arcsin": return qty(Decimal.asin(n()));
-    case "acos": case "arccos": return qty(Decimal.acos(n()));
-    case "atan": case "arctan": return qty(Decimal.atan(n()));
-    case "sinh": return qty(Decimal.sinh(n()));
-    case "cosh": return qty(Decimal.cosh(n()));
-    case "tanh": return qty(Decimal.tanh(n()));
-    case "ln": return qty(Decimal.ln(n()));
-    case "lg": case "log": return qty(Decimal.log10(n()));
-    case "log2": return qty(Decimal.log2(n()));
-    case "exp": return qty(Decimal.exp(n()));
-    case "abs": return x.kind === "quantity" ? { ...x, value: x.value.abs() } : qty(n().abs());
-    case "round": return x.kind === "quantity" ? { ...x, value: x.value.round() } : qty(n().round());
-    case "ceil": return x.kind === "quantity" ? { ...x, value: x.value.ceil() } : qty(n().ceil());
-    case "floor": return x.kind === "quantity" ? { ...x, value: x.value.floor() } : qty(n().floor());
-    case "fact": case "factorial": return qty(factorial(n()));
-    case "until": {
-      if (x.kind !== "date") throw new EvalError("until needs a date");
-      return evalDateArith("minus", x, { kind: "date", ms: startOfToday(), hasTime: false });
-    }
-    case "since": {
-      if (x.kind !== "date") throw new EvalError("since needs a date");
-      return evalDateArith("minus", { kind: "date", ms: startOfToday(), hasTime: false }, x);
-    }
-    default: throw new EvalError(`unknown function ${name}`);
-  }
+  const func = BUILTIN_FUNCS[name];
+  if (!func) throw new EvalError(`unknown function ${name}`);
+  return func(x, ctx);
 }

 // Native float, not Decimal: this is a PRNG (mulberry32/strHash bit-twiddling
@ -589,10 +739,15 @@ function evalRandom(args: Value[], ctx: EvalCtx): Value {
  const seed = strHash(ctx.line.lineText) ^ (ctx.line.index * 0x9e3779b9);
  const rand = mulberry32(seed);
  if (args.length === 0) return qty(new Decimal(rand));
-  const toNum = (v: Value) => v.kind === "quantity" ? v.value.toNumber() : 0;
-  const [lo, hi] = args.length === 1 ? [0, toNum(args[0]!)] : [toNum(args[0]!), toNum(args[1]!)];
+  const toNum = (v: Value) => (v.kind === "quantity" ? v.value.toNumber() : 0);
+  const [lo, hi] =
+    args.length === 1
+      ? [0, toNum(args[0]!)]
+      : [toNum(args[0]!), toNum(args[1]!)];
  const isInt = Number.isInteger(lo) && Number.isInteger(hi);
-  const raw = isInt ? Math.floor(rand * (hi - lo + 1)) + lo : rand * (hi - lo) + lo;
+  const raw = isInt
+    ? Math.floor(rand * (hi - lo + 1)) + lo
+    : rand * (hi - lo) + lo;
  return qty(new Decimal(raw));
 }

@ -605,25 +760,32 @@ function strHash(s: string): number {
 }

 function mulberry32(seed: number): number {
-  seed = (seed + 0x6D2B79F5) | 0;
+  seed = (seed + 0x6d2b79f5) | 0;
  let t = Math.imul(seed ^ (seed >>> 15), 1 | seed);
-  t = t + Math.imul(t ^ (t >>> 7), 61 | t) ^ t;
+  t = (t + Math.imul(t ^ (t >>> 7), 61 | t)) ^ t;
  return ((t ^ (t >>> 14)) >>> 0) / 4294967296;
 }

 function factorial(n: Decimal): Decimal {
  if (!n.isInteger() || n.isNegative() || n.gt(300)) throw new EvalError("bad factorial");
-  let acc = new Decimal(1);
+  let acc = DEC_ONE;
  for (let i = 2; i <= n.toNumber(); i++) acc = acc.mul(i);
  return acc;
 }

-function evaluateConst(node: { k: "const", name: "pi" | "e" | "half" | "onehalf" }): Value {
+function evaluateConst(node: {
+  k: "const";
+  name: "pi" | "e" | "half" | "onehalf";
+}): Value {
  switch (node.name) {
-    case "pi": return qty(PI);
-    case "e": return qty(E);
-    case "half": return qty(new Decimal("0.5"));
-    case "onehalf": return qty(new Decimal("1.5"));
+    case "pi":
+      return qty(PI);
+    case "e":
+      return qty(E);
+    case "half":
+      return qty(new Decimal("0.5"));
+    case "onehalf":
+      return qty(new Decimal("1.5"));
  }
 }

@ -636,7 +798,9 @@ function evaluateRef(node: Node, ctx: EvalCtx): Value {
  if (node.k === "xref") {
    const res = ctx.resolveXRef?.(node.sheet, node.key);
    if (!res || !res.ok) {
-      throw new XRefError(res && !res.ok ? res.reason : `sheet "${node.sheet}" not found`);
+      throw new XRefError(
+        res && !res.ok ? res.reason : `sheet "${node.sheet}" not found`,
+      );
    }
    return res.value;
  }
@ -688,7 +852,7 @@ function evaluateUnitMod(node: Node, ctx: EvalCtx): Value {
  throw new EvalError("invalid unit mod node");
 }

-function evaluateSeq(node: { k: "seq", items: Node[] }, ctx: EvalCtx): Value {
+function evaluateSeq(node: { k: "seq"; items: Node[] }, ctx: EvalCtx): Value {
  let acc: Value | null = null;
  for (const item of node.items) {
    let v: Value;
@ -698,8 +862,11 @@ function evaluateSeq(node: { k: "seq", items: Node[] }, ctx: EvalCtx): Value {
      continue;
    }
    if (
-      acc?.kind === "quantity" && v.kind === "quantity" &&
-      acc.unit && v.unit && acc.unit.dimension === v.unit.dimension &&
+      acc?.kind === "quantity" &&
+      v.kind === "quantity" &&
+      acc.unit &&
+      v.unit &&
+      acc.unit.dimension === v.unit.dimension &&
      acc.unit.dimension !== "scalar"
    ) {
      // "2 hours 30 min", "5 ft 4 in" — adjacent same-dimension quantities add up
--- a/src/engine/parser.ts
+++ b/src/engine/parser.ts
@ -62,6 +62,18 @@ export function parseLine(tokens: Token[], knownVars: Set<string>, line: string)
    }
  }

+  const filtered = filterNoiseTokens(toks, knownVars);
+
+  const goalSeek = tryParseGoalSeek(filtered, knownVars);
+  if (goalSeek) {
+    return { expr: goalSeek };
+  }
+
+  const p = new Parser(filtered, knownVars);
+  return { assign, expr: p.parseSeq() };
+}
+
+function filterNoiseTokens(toks: Token[], knownVars: Set<string>): Token[] {
  // Noise filtering: drop junk and unknown words, but keep words that follow
  // a conversion operator (potential timezone names).
  const filtered: Token[] = [];
@ -81,7 +93,10 @@ export function parseLine(tokens: Token[], knownVars: Set<string>, line: string)
    afterConv = tk.t === "conv";
    filtered.push(tk);
  }
+  return filtered;
+}

+function tryParseGoalSeek(filtered: Token[], knownVars: Set<string>): Node | null {
  // Goal seek: `? * 1.2 = 1000` → find x where lhs(x) = rhs(x)
  const hasUnknown = filtered.some((tk) => tk.t === "unknown");
  if (hasUnknown) {
@ -89,12 +104,10 @@ export function parseLine(tokens: Token[], knownVars: Set<string>, line: string)
    if (assignIdx >= 0) {
      const lhs = new Parser(filtered.slice(0, assignIdx), knownVars).parseSeq();
      const rhs = new Parser(filtered.slice(assignIdx + 1), knownVars).parseSeq();
-      if (lhs && rhs) return { expr: { k: "goalseek", lhs, rhs } };
+      if (lhs && rhs) return { k: "goalseek", lhs, rhs };
    }
  }
-
-  const p = new Parser(filtered, knownVars);
-  return { assign, expr: p.parseSeq() };
+  return null;
 }


@ -204,114 +217,131 @@ class Parser {

    if (!lhs) return null;

-    for (;;) {
+    loop: for (;;) {
      tk = this.peek();
      if (!tk) break;

-      if (tk.t === "percent") {
-        if (PREC.POSTFIX < minPrec) break;
-        this.i++;
-        lhs = { k: "pct", x: lhs };
-        continue;
-      }
-      if (tk.t === "bang") {
-        if (PREC.POSTFIX < minPrec) break;
-        this.i++;
-        lhs = { k: "fact", x: lhs };
-        continue;
-      }
-      if (tk.t === "unit") {
-        if (PREC.POSTFIX < minPrec) break;
-        this.i++;
-        lhs = { k: "unit", x: lhs, unit: tk.unit };
-        continue;
-      }
-      if (tk.t === "currency") {
-        if (PREC.POSTFIX < minPrec) break;
-        this.i++;
-        lhs = { k: "curr", x: lhs, code: tk.code };
-        continue;
-      }
-      if (tk.t === "scale") {
-        if (PREC.POSTFIX < minPrec) break;
-        this.i++;
-        lhs = { k: "scale", x: lhs, mult: tk.mult, label: "" };
-        continue;
-      }
-      if (tk.t === "op" && tk.op === "pow") {
-        if (PREC.POW < minPrec) break;
-        const save = this.i;
-        this.i++;
-        const r = this.parseExpr(PREC.POW);
-        if (!r) { this.i = save; break; }
-        lhs = { k: "bin", op: "pow", l: lhs, r };
-        continue;
-      }
-      if (tk.t === "op" && (tk.op === "mul" || tk.op === "div" || tk.op === "mod")) {
-        if (PREC.MUL < minPrec) break;
-        const save = this.i;
-        this.i++;
-        const r = this.parseExpr(PREC.MUL + 1);
-        if (!r) { this.i = save; break; }
-        lhs = { k: "bin", op: tk.op, l: lhs, r };
-        continue;
-      }
-      if (tk.t === "pctop" && (tk.op === "of" || tk.op === "off" || tk.op === "on")) {
-        if (!(lhs.k === "pct" || lhs.k === "var" || lhs.k === "pctop")) {
+      switch (tk.t) {
+        case "percent": {
+          if (PREC.POSTFIX < minPrec) break loop;
          this.i++;
-          continue;
+          lhs = { k: "pct", x: lhs };
+          continue loop;
+        }
+        case "bang": {
+          if (PREC.POSTFIX < minPrec) break loop;
+          this.i++;
+          lhs = { k: "fact", x: lhs };
+          continue loop;
+        }
+        case "unit": {
+          if (PREC.POSTFIX < minPrec) break loop;
+          this.i++;
+          lhs = { k: "unit", x: lhs, unit: tk.unit };
+          continue loop;
+        }
+        case "currency": {
+          if (PREC.POSTFIX < minPrec) break loop;
+          this.i++;
+          lhs = { k: "curr", x: lhs, code: tk.code };
+          continue loop;
+        }
+        case "scale": {
+          if (PREC.POSTFIX < minPrec) break loop;
+          this.i++;
+          lhs = { k: "scale", x: lhs, mult: tk.mult, label: "" };
+          continue loop;
+        }
+        case "op": {
+          switch (tk.op) {
+            case "pow": {
+              if (PREC.POW < minPrec) break loop;
+              const save = this.i;
+              this.i++;
+              const r = this.parseExpr(PREC.POW);
+              if (!r) { this.i = save; break loop; }
+              lhs = { k: "bin", op: "pow", l: lhs, r };
+              continue loop;
+            }
+            case "mul":
+            case "div":
+            case "mod": {
+              if (PREC.MUL < minPrec) break loop;
+              const save = this.i;
+              this.i++;
+              const r = this.parseExpr(PREC.MUL + 1);
+              if (!r) { this.i = save; break loop; }
+              lhs = { k: "bin", op: tk.op, l: lhs, r };
+              continue loop;
+            }
+            case "plus":
+            case "minus": {
+              if (PREC.ADD < minPrec) break loop;
+              const save = this.i;
+              this.i++;
+              const r = this.parseExpr(PREC.ADD + 1);
+              if (!r) { this.i = save; break loop; }
+              lhs = { k: "bin", op: tk.op, l: lhs, r };
+              continue loop;
+            }
+          }
+          break loop;
+        }
+        case "pctop": {
+          if (tk.op === "of" || tk.op === "off" || tk.op === "on") {
+            if (!(lhs.k === "pct" || lhs.k === "var" || lhs.k === "pctop")) {
+              this.i++;
+              continue loop;
+            }
+            if (PREC.MUL < minPrec) break loop;
+            const save = this.i;
+            this.i++;
+            const r = this.parseExpr(PREC.MUL + 1);
+            if (!r) { this.i = save; break loop; }
+            lhs = { k: "pctop", op: tk.op, l: lhs, r };
+            continue loop;
+          }
+          if (tk.op.startsWith("as_pct") || tk.op.endsWith("what_is")) {
+            if (PREC.CONV < minPrec) break loop;
+            const save = this.i;
+            this.i++;
+            const r = this.parseExpr(PREC.ADD);
+            if (!r) { this.i = save; break loop; }
+            lhs = { k: "pctop", op: tk.op, l: lhs, r };
+            continue loop;
+          }
+          break loop;
+        }
+        case "lparen":
+        case "const":
+        case "func":
+        case "word": {
+          if (tk.t === "word" && !this.vars.has(tk.raw)) break loop;
+          if (PREC.MUL < minPrec) break loop;
+          const save = this.i;
+          const r = this.parseExpr(PREC.MUL + 1);
+          if (!r) { this.i = save; break loop; }
+          lhs = { k: "bin", op: "mul", l: lhs, r };
+          continue loop;
+        }
+        case "bitop": {
+          if (PREC.BIT < minPrec) break loop;
+          const save = this.i;
+          this.i++;
+          const r = this.parseExpr(PREC.BIT + 1);
+          if (!r) { this.i = save; break loop; }
+          lhs = { k: "bit", op: tk.op, l: lhs, r };
+          continue loop;
+        }
+        case "conv": {
+          if (PREC.CONV < minPrec) break loop;
+          const save = this.i;
+          this.i++;
+          const target = this.parseTarget();
+          if (!target) { this.i = save; break loop; }
+          lhs = { k: "conv", x: lhs, target: this.tryHistoricalDate(target) };
+          continue loop;
        }
-        if (PREC.MUL < minPrec) break;
-        const save = this.i;
-        this.i++;
-        const r = this.parseExpr(PREC.MUL + 1);
-        if (!r) { this.i = save; break; }
-        lhs = { k: "pctop", op: tk.op, l: lhs, r };
-        continue;
-      }
-      if (tk.t === "lparen" || tk.t === "const" || tk.t === "func" || (tk.t === "word" && this.vars.has(tk.raw))) {
-        if (PREC.MUL < minPrec) break;
-        const save = this.i;
-        const r = this.parseExpr(PREC.MUL + 1);
-        if (!r) { this.i = save; break; }
-        lhs = { k: "bin", op: "mul", l: lhs, r };
-        continue;
-      }
-      if (tk.t === "op" && (tk.op === "plus" || tk.op === "minus")) {
-        if (PREC.ADD < minPrec) break;
-        const save = this.i;
-        this.i++;
-        const r = this.parseExpr(PREC.ADD + 1);
-        if (!r) { this.i = save; break; }
-        lhs = { k: "bin", op: tk.op, l: lhs, r };
-        continue;
-      }
-      if (tk.t === "bitop") {
-        if (PREC.BIT < minPrec) break;
-        const save = this.i;
-        this.i++;
-        const r = this.parseExpr(PREC.BIT + 1);
-        if (!r) { this.i = save; break; }
-        lhs = { k: "bit", op: tk.op, l: lhs, r };
-        continue;
-      }
-      if (tk.t === "conv") {
-        if (PREC.CONV < minPrec) break;
-        const save = this.i;
-        this.i++;
-        const target = this.parseTarget();
-        if (!target) { this.i = save; break; }
-        lhs = { k: "conv", x: lhs, target: this.tryHistoricalDate(target) };
-        continue;
-      }
-      if (tk.t === "pctop" && (tk.op.startsWith("as_pct") || tk.op.endsWith("what_is"))) {
-        if (PREC.CONV < minPrec) break;
-        const save = this.i;
-        this.i++;
-        const r = this.parseExpr(PREC.ADD);
-        if (!r) { this.i = save; break; }
-        lhs = { k: "pctop", op: tk.op, l: lhs, r };
-        continue;
      }

      break;
--- a/src/engine/registry.ts
+++ b/src/engine/registry.ts
@ -178,29 +178,29 @@ function registerCoreVocab(reg: Registry): void {
    ["minus", { t: "op", op: "minus" }],
    ["multiply", { t: "op", op: "mul" }],
    ["divide", { t: "op", op: "div" }],
+    ["conversion", { t: "conv" }],
+    ["assignment", { t: "assign" }],
+    ["sum", { t: "agg", name: "sum" }],
+    ["avg", { t: "agg", name: "avg" }],
+    ["prev", { t: "agg", name: "prev" }],
+    ["count", { t: "agg", name: "count" }],
+    ["min", { t: "agg", name: "min" }],
+    ["max", { t: "agg", name: "max" }],
+    ["product", { t: "agg", name: "product" }],
+    ["chart", { t: "agg", name: "chart" }],
+    ["sqrt", { t: "func", name: "sqrt" }],
+    ["cbrt", { t: "func", name: "cbrt" }],
+    ["abs", { t: "func", name: "abs" }],
+    ["ln", { t: "func", name: "ln" }],
+    ["log", { t: "func", name: "log" }],
+    ["round", { t: "func", name: "round" }],
+    ["random", { t: "func", name: "random" }],
+    ["until", { t: "func", name: "until" }],
+    ["since", { t: "func", name: "since" }],
  ];
  for (const [key, payload] of ops) {
    for (const v of vocab.variants("Operations", `${key}.variants`)) reg.addPhrase(v, payload, { caseSensitive: false });
  }
-  for (const v of vocab.variants("Operations", "conversion.variants")) reg.addPhrase(v, { t: "conv" }, { caseSensitive: false });
-  for (const v of vocab.variants("Operations", "assignment.variants")) reg.addPhrase(v, { t: "assign" }, { caseSensitive: false });
-  for (const v of vocab.variants("Operations", "sum.variants")) reg.addPhrase(v, { t: "agg", name: "sum" }, { caseSensitive: false });
-  for (const v of vocab.variants("Operations", "avg.variants")) reg.addPhrase(v, { t: "agg", name: "avg" }, { caseSensitive: false });
-  for (const v of vocab.variants("Operations", "prev.variants")) reg.addPhrase(v, { t: "agg", name: "prev" }, { caseSensitive: false });
-  for (const v of vocab.variants("Operations", "count.variants")) reg.addPhrase(v, { t: "agg", name: "count" }, { caseSensitive: false });
-  for (const v of vocab.variants("Operations", "min.variants")) reg.addPhrase(v, { t: "agg", name: "min" }, { caseSensitive: false });
-  for (const v of vocab.variants("Operations", "max.variants")) reg.addPhrase(v, { t: "agg", name: "max" }, { caseSensitive: false });
-  for (const v of vocab.variants("Operations", "product.variants")) reg.addPhrase(v, { t: "agg", name: "product" }, { caseSensitive: false });
-  for (const v of vocab.variants("Operations", "chart.variants")) reg.addPhrase(v, { t: "agg", name: "chart" }, { caseSensitive: false });
-  for (const v of vocab.variants("Operations", "sqrt.variants")) reg.addPhrase(v, { t: "func", name: "sqrt" }, { caseSensitive: false });
-  for (const v of vocab.variants("Operations", "cbrt.variants")) reg.addPhrase(v, { t: "func", name: "cbrt" }, { caseSensitive: false });
-  for (const v of vocab.variants("Operations", "abs.variants")) reg.addPhrase(v, { t: "func", name: "abs" }, { caseSensitive: false });
-  for (const v of vocab.variants("Operations", "ln.variants")) reg.addPhrase(v, { t: "func", name: "ln" }, { caseSensitive: false });
-  for (const v of vocab.variants("Operations", "log.variants")) reg.addPhrase(v, { t: "func", name: "log" }, { caseSensitive: false });
-  for (const v of vocab.variants("Operations", "round.variants")) reg.addPhrase(v, { t: "func", name: "round" }, { caseSensitive: false });
-  for (const v of vocab.variants("Operations", "random.variants")) reg.addPhrase(v, { t: "func", name: "random" }, { caseSensitive: false });
-  for (const v of vocab.variants("Operations", "until.variants")) reg.addPhrase(v, { t: "func", name: "until" }, { caseSensitive: false });
-  for (const v of vocab.variants("Operations", "since.variants")) reg.addPhrase(v, { t: "func", name: "since" }, { caseSensitive: false });
  reg.addPhrase("mod", { t: "op", op: "mod" }, { caseSensitive: false });
  reg.addPhrase("modulo", { t: "op", op: "mod" }, { caseSensitive: false });

--- a/src/engine/types.ts
+++ b/src/engine/types.ts
@ -6,6 +6,8 @@ export { Decimal };

 /** Shared here (not in evaluator.ts) so unitdata.ts can use it too without a cycle. */
 export const PI = new Decimal("3.14159265358979323846264338327950288419716939937510");
+export const DEC_ZERO = new Decimal(0);
+export const DEC_ONE = new Decimal(1);

 export type Dimension =
  | "scalar"
--- a/src/logger.test.ts
+++ b/src/logger.test.ts
@ -0,0 +1,30 @@
+import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
+import { logger } from './logger';
+
+describe('logger', () => {
+  beforeEach(() => {
+    vi.spyOn(console, 'info').mockImplementation(() => {});
+    vi.spyOn(console, 'warn').mockImplementation(() => {});
+    vi.spyOn(console, 'error').mockImplementation(() => {});
+  });
+
+  afterEach(() => {
+    vi.restoreAllMocks();
+  });
+
+  it('should call console.info with correct arguments', () => {
+    logger.info('test info', { key: 'value' });
+    expect(console.info).toHaveBeenCalledWith('test info', { key: 'value' });
+  });
+
+  it('should call console.warn with correct arguments', () => {
+    logger.warn('test warn', 42);
+    expect(console.warn).toHaveBeenCalledWith('test warn', 42);
+  });
+
+  it('should call console.error with correct arguments', () => {
+    const error = new Error('test error');
+    logger.error('test error message', error);
+    expect(console.error).toHaveBeenCalledWith('test error message', error);
+  });
+});
--- a/src/main.test.ts
+++ b/src/main.test.ts
@ -0,0 +1,127 @@
+import { test, vi, expect } from "vitest";
+
+vi.mock("./ui/editor", () => ({
+    SumEditor: vi.fn().mockImplementation(() => ({
+        goToLine: vi.fn(),
+        getSheetWithResults: vi.fn(() => "test-results"),
+        getText: vi.fn(() => "test"),
+        focus: vi.fn(),
+        refresh: vi.fn(),
+    }))
+}));
+
+vi.mock("@tauri-apps/api/core", () => ({
+    invoke: vi.fn(() => Promise.resolve(false)),
+}));
+
+vi.mock("@tauri-apps/api/window", () => ({
+    getCurrentWindow: vi.fn(() => ({
+        minimize: vi.fn(),
+        hide: vi.fn(),
+        show: vi.fn(),
+    })),
+}));
+
+vi.mock("./storage", async (importOriginal) => {
+    const actual = await importOriginal();
+    return {
+        ...actual as object,
+        isTauri: vi.fn(() => false),
+        loadSettings: vi.fn(() => ({ language: "en", autostart: false, alwaysOnTop: false, autoUpdateEnabled: false, sidebarVisible: false, hotkey: "CmdOrCtrl+Space" })),
+        loadAppData: vi.fn(() => ({ docs: [{id: "1", title: "Test"}], contents: {}, activeId: "1" })),
+        saveSettings: vi.fn(),
+        saveAppData: vi.fn(),
+        getLaunchFile: vi.fn(() => null),
+        flushAppData: vi.fn(),
+        onAppQuit: vi.fn((_cb: any) => {}),
+        onOpenFile: vi.fn(),
+        onFileDrop: vi.fn(),
+        registerHotkey: vi.fn(() => Promise.resolve(true)),
+        applyAutostart: vi.fn(),
+        applyAlwaysOnTop: vi.fn(),
+        fetchRates: vi.fn(),
+        fetchMarketData: vi.fn(),
+        loadExtensionScripts: vi.fn(() => Promise.resolve([])),
+    };
+});
+
+vi.mock("./ui/search", () => ({
+    initSearch: vi.fn(() => ({ open: vi.fn() }))
+}));
+
+vi.mock("./updater", () => ({
+    checkForUpdate: vi.fn(() => Promise.resolve(null))
+}));
+
+vi.mock("./extensions", () => ({
+    runExtensions: vi.fn(() => Promise.resolve())
+}));
+
+test("boot application", async () => {
+    const createMockElement = () => ({
+        addEventListener: vi.fn(),
+        removeEventListener: vi.fn(),
+        classList: { add: vi.fn(), remove: vi.fn(), toggle: vi.fn(), contains: vi.fn() },
+        style: { setProperty: vi.fn() },
+        dataset: {},
+        value: "",
+        appendChild: vi.fn(),
+        setAttribute: vi.fn(),
+        getBoundingClientRect: vi.fn(() => ({ right: 100, width: 100 })),
+        closest: vi.fn(),
+        blur: vi.fn(),
+        replaceChildren: vi.fn(),
+    });
+
+    const mock$ = vi.fn(createMockElement);
+
+    vi.stubGlobal("document", {
+        querySelector: mock$,
+        querySelectorAll: vi.fn(() => []), // For i18n
+        addEventListener: vi.fn(),
+        removeEventListener: vi.fn(),
+        body: createMockElement(),
+        documentElement: createMockElement(),
+        createElement: vi.fn(createMockElement),
+        createElementNS: vi.fn(createMockElement),
+        createDocumentFragment: vi.fn(createMockElement),
+        head: createMockElement(),
+    });
+
+    vi.stubGlobal("window", {
+        addEventListener: vi.fn(),
+        removeEventListener: vi.fn(),
+        performance: { now: () => 0 },
+        print: vi.fn(),
+        getSelection: vi.fn(() => null),
+        setInterval: vi.fn(),
+        setTimeout: vi.fn().mockImplementation((cb: Function) => cb()),
+        dispatchEvent: vi.fn(),
+        CustomEvent: vi.fn(),
+    });
+
+    vi.stubGlobal("matchMedia", vi.fn(() => ({
+        addEventListener: vi.fn(),
+        removeEventListener: vi.fn(),
+        matches: false,
+    })));
+
+    vi.stubGlobal("navigator", {
+        clipboard: { writeText: vi.fn() },
+        language: "en",
+    });
+
+    vi.stubGlobal("localStorage", {
+        getItem: vi.fn(() => null),
+        setItem: vi.fn(),
+    });
+
+    // Import main and wait for boot to complete
+    await import("./main");
+    await new Promise(r => setTimeout(r, 0));
+
+    // As mock is hoisted, we can import actual mocked funcs
+    const { loadSettings, loadAppData } = await import("./storage");
+    expect(loadSettings).toHaveBeenCalled();
+    expect(loadAppData).toHaveBeenCalled();
+});
--- a/src/main.ts
+++ b/src/main.ts
@ -4,12 +4,32 @@ import "./ui/app.css";
 import { SumEngine } from "./engine";
 import { SumEditor } from "./ui/editor";
 import {
-  AppData, DocMeta, SettingsData, defaultSettingsData,
-  loadAppData, saveAppData, flushAppData, onAppQuit, loadSettings, saveSettings,
-  fetchRates, fetchMarketData, fetchHistoricalRatesBatch, loadExtensionScripts, openExtensionsFolder, isTauri,
-  getLaunchFile, onOpenFile, onFileDrop,
-  setDataDir, runBackups, backupDeletedSheet, openBackupsFolder,
-  chooseFolder, dataDirHasDocuments, migrateDataDir,
+  AppData,
+  DocMeta,
+  SettingsData,
+  defaultSettingsData,
+  loadAppData,
+  saveAppData,
+  flushAppData,
+  onAppQuit,
+  loadSettings,
+  saveSettings,
+  fetchRates,
+  fetchMarketData,
+  fetchHistoricalRatesBatch,
+  loadExtensionScripts,
+  openExtensionsFolder,
+  isTauri,
+  getLaunchFile,
+  onOpenFile,
+  onFileDrop,
+  setDataDir,
+  runBackups,
+  backupDeletedSheet,
+  openBackupsFolder,
+  chooseFolder,
+  dataDirHasDocuments,
+  migrateDataDir,
 } from "./storage";
 import type { LineResult } from "./engine";
 import { setLang, detectLang, t } from "./i18n";
@ -23,10 +43,13 @@ import pkg from "../package.json";

 function welcomeText(lang: string): string {
  const sample = (lang === "ru" ? RU : EN).Samples?.["sample.welcome"];
-  return (sample ?? "# Sample\n8 / (45 - 20%)\n5 inches in cm\n$9 in Euro") + "\n";
+  return (
+    (sample ?? "# Sample\n8 / (45 - 20%)\n5 inches in cm\n$9 in Euro") + "\n"
+  );
 }

-const $ = <T extends HTMLElement>(sel: string): T => document.querySelector(sel) as T;
+const $ = <T extends HTMLElement>(sel: string): T =>
+  document.querySelector(sel) as T;

 let engine: SumEngine;
 let editor: SumEditor;
@ -46,8 +69,12 @@ function uid(): string {

 // ---------- documents

+function getDocById(id: string | undefined): DocMeta | undefined {
+  return data.docs.find((d) => d.id === id);
+}
+
 function activeDoc(): DocMeta {
-  return data.docs.find((d) => d.id === data.activeId) ?? data.docs[0];
+  return getDocById(data.activeId) ?? data.docs[0];
 }

 function titleFromContent(text: string): string {
@ -67,21 +94,34 @@ function syncTitleField(): void {
  if (document.activeElement !== field) field.value = activeDoc()?.title ?? "";
 }

+function removeDocById(id: string): void {
+  data.docs = data.docs.filter((d) => d.id !== id);
+}
+
 function pinDoc(id: string): void {
-  const doc = data.docs.find((d) => d.id === id);
+  const doc = getDocById(id);
  if (!doc) return;
  doc.pinned = !doc.pinned;
  if (doc.pinned) {
    // move to end of pinned group
-    data.docs = data.docs.filter((d) => d.id !== id);
+    removeDocById(id);
    let lastPinned = -1;
-    for (let i = data.docs.length - 1; i >= 0; i--) { if (data.docs[i].pinned) { lastPinned = i; break; } }
+    for (let i = data.docs.length - 1; i >= 0; i--) {
+      if (data.docs[i].pinned) {
+        lastPinned = i;
+        break;
+      }
+    }
    data.docs.splice(lastPinned + 1, 0, doc);
  } else {
    // move to start of non-pinned group
-    data.docs = data.docs.filter((d) => d.id !== id);
+    removeDocById(id);
    const firstNonPinned = data.docs.findIndex((d) => !d.pinned);
-    data.docs.splice(firstNonPinned === -1 ? data.docs.length : firstNonPinned, 0, doc);
+    data.docs.splice(
+      firstNonPinned === -1 ? data.docs.length : firstNonPinned,
+      0,
+      doc,
+    );
  }
  saveAppData(data);
  renderDocList();
@ -90,17 +130,17 @@ function pinDoc(id: string): void {
 /** drag id -> drop-target id; no-op across the pinned/unpinned boundary */
 function reorderDoc(srcId: string, targetId: string): void {
  if (srcId === targetId) return;
-  const src = data.docs.find((d) => d.id === srcId);
-  const target = data.docs.find((d) => d.id === targetId);
+  const src = getDocById(srcId);
+  const target = getDocById(targetId);
  if (!src || !target || !!src.pinned !== !!target.pinned) return;
-  data.docs = data.docs.filter((d) => d.id !== srcId);
+  removeDocById(srcId);
  const targetIdx = data.docs.findIndex((d) => d.id === targetId);
  data.docs.splice(targetIdx, 0, src);
  saveAppData(data);
  renderDocList();
 }

-function setupDocInteraction(el: HTMLElement, doc: DocMeta, list: HTMLElement, data: AppData): void {
+function setupDocInteraction(el: HTMLElement, doc: DocMeta, list: HTMLElement): void {
  // Reordering uses plain mouse tracking, not the native HTML5 drag API —
  // Tauri's window-level file-drop hook (dragDropEnabled, needed for
  // dropping .numi files from Explorer) intercepts WebView2's own drag
@ -111,7 +151,9 @@ function setupDocInteraction(el: HTMLElement, doc: DocMeta, list: HTMLElement, d
  el.addEventListener("mousedown", (e) => {
    if ((e.target as HTMLElement).closest("button")) return;
    const startY = e.clientY;
-    let cachedItems: { el: HTMLElement, top: number, bottom: number }[] | null = null;
+    let cachedItems: { el: HTMLElement; top: number; bottom: number }[] | null =
+      null;
+    let prevOver: HTMLElement | undefined;
    const onMove = (ev: MouseEvent) => {
      if (!cachedItems) {
        const domItems = [...list.querySelectorAll<HTMLElement>(".doc-item")];
@ -129,19 +171,28 @@ function setupDocInteraction(el: HTMLElement, doc: DocMeta, list: HTMLElement, d
      }
      let over: HTMLElement | undefined;
      for (const item of cachedItems) {
-        item.el.classList.remove("drag-over");
        if (!over && item.el !== el) {
          if (ev.clientY >= item.top && ev.clientY <= item.bottom) {
            over = item.el;
          }
        }
      }
+      let newOver: HTMLElement | undefined;
      if (over) {
-        const overDoc = data.docs.find((d) => d.id === over.dataset.docId);
-        if (overDoc && !!overDoc.pinned === !!doc.pinned) over.classList.add("drag-over");
+        const overDoc = getDocById(over.dataset.docId);
+        if (overDoc && !!overDoc.pinned === !!doc.pinned) newOver = over;
      }
+      if (prevOver && prevOver !== newOver) {
+        prevOver.classList.remove("drag-over");
+      }
+      if (newOver && prevOver !== newOver) {
+        newOver.classList.add("drag-over");
+      }
+      prevOver = newOver;
+    };
+    const onScroll = () => {
+      cachedItems = null;
    };
-    const onScroll = () => { cachedItems = null; };
    const onUp = () => {
      window.removeEventListener("mousemove", onMove);
      window.removeEventListener("mouseup", onUp);
@ -149,7 +200,8 @@ function setupDocInteraction(el: HTMLElement, doc: DocMeta, list: HTMLElement, d
      cachedItems = null;
      if (dragging) {
        const target = list.querySelector<HTMLElement>(".doc-item.drag-over");
-        for (const item of list.querySelectorAll(".doc-item")) item.classList.remove("drag-over", "dragging");
+        for (const item of list.querySelectorAll(".doc-item"))
+          item.classList.remove("drag-over", "dragging");
        document.body.style.cursor = "";
        if (target?.dataset.docId) reorderDoc(doc.id, target.dataset.docId);
      }
@ -160,22 +212,37 @@ function setupDocInteraction(el: HTMLElement, doc: DocMeta, list: HTMLElement, d
    list.addEventListener("scroll", onScroll);
  });
  el.addEventListener("click", () => {
-    if (suppressClick) { suppressClick = false; return; }
+    if (suppressClick) {
+      suppressClick = false;
+      return;
+    }
    switchDoc(doc.id);
  });
 }

-function mkBtn(cls: string, text: string, title: string, cb: () => void): HTMLButtonElement {
+function mkBtn(
+  cls: string,
+  text: string,
+  title: string,
+  cb: () => void,
+): HTMLButtonElement {
  const b = document.createElement("button");
  b.className = cls;
  b.textContent = text;
  b.title = title;
  b.setAttribute("aria-label", title);
-  b.addEventListener("click", (e) => { e.stopPropagation(); cb(); });
+  b.addEventListener("click", (e) => {
+    e.stopPropagation();
+    cb();
+  });
  return b;
 }

-function createDeleteButton(doc: DocMeta, appData: AppData, appSettings: SettingsData): HTMLButtonElement {
+function createDeleteButton(
+  doc: DocMeta,
+  appData: AppData,
+  appSettings: SettingsData,
+): HTMLButtonElement {
  const del = document.createElement("button");
  del.className = "del";
  del.textContent = "✕";
@ -193,9 +260,13 @@ function createDeleteButton(doc: DocMeta, appData: AppData, appSettings: Setting
      return;
    }
    if (confirmTimer) clearTimeout(confirmTimer);
-    void backupDeletedSheet(appSettings.dataDir, doc.title, appData.contents[doc.id] ?? "");
+    void backupDeletedSheet(
+      appSettings.dataDir,
+      doc.title,
+      appData.contents[doc.id] ?? "",
+    );
    delete appData.contents[doc.id];
-    appData.docs = appData.docs.filter((d) => d.id !== doc.id);
+    removeDocById(doc.id);
    if (appData.activeId === doc.id) switchDoc(appData.docs[0].id);
    else renderDocList();
    saveAppData(appData);
@ -209,15 +280,25 @@ function renderDocList(): void {
  const frag = document.createDocumentFragment();
  for (const doc of data.docs) {
    const el = document.createElement("div");
-    el.className = "doc-item" + (doc.id === data.activeId ? " active" : "") + (doc.pinned ? " pinned" : "");
+    el.className =
+      "doc-item" +
+      (doc.id === data.activeId ? " active" : "") +
+      (doc.pinned ? " pinned" : "");
    const name = document.createElement("span");
    name.className = "doc-name";
    name.textContent = doc.title || t("untitled");
    el.appendChild(name);

-    el.appendChild(mkBtn("pin-btn" + (doc.pinned ? " active" : ""), "📌", doc.pinned ? t("unpin") : t("pin"), () => pinDoc(doc.id)));
+    el.appendChild(
+      mkBtn(
+        "pin-btn" + (doc.pinned ? " active" : ""),
+        "📌",
+        doc.pinned ? t("unpin") : t("pin"),
+        () => pinDoc(doc.id),
+      ),
+    );

-    setupDocInteraction(el, doc, list, data);
+    setupDocInteraction(el, doc, list);
    el.dataset.docId = doc.id;

    el.appendChild(createDeleteButton(doc, data, settings));
@ -239,14 +320,17 @@ function switchDoc(id: string): void {

 function newDoc(content = ""): void {
  const id = uid();
-  data.docs.push({ id, title: content ? titleFromContent(content) : t("untitled") });
+  data.docs.push({
+    id,
+    title: content ? titleFromContent(content) : t("untitled"),
+  });
  data.contents[id] = content;
  switchDoc(id);
 }

 async function closeActiveDoc(): Promise<void> {
  if (data.docs.length <= 1) return;
-  const doc = data.docs.find((d) => d.id === data.activeId);
+  const doc = getDocById(data.activeId);
  if (!doc) return;
  const content = data.contents[doc.id] ?? "";
  if (content.trim()) {
@ -256,8 +340,8 @@ async function closeActiveDoc(): Promise<void> {
  const idx = data.docs.findIndex((d) => d.id === doc.id);
  void backupDeletedSheet(settings.dataDir, doc.title, content);
  delete data.contents[doc.id];
-  data.docs = data.docs.filter((d) => d.id !== doc.id);
-  const nextId = data.docs[idx] ? data.docs[idx].id : data.docs[idx - 1]?.id ?? data.docs[0].id;
+  removeDocById(doc.id);
+  const nextId = data.docs[idx] ? data.docs[idx].id : (data.docs[idx - 1]?.id ?? data.docs[0].id);
  switchDoc(nextId);
  saveAppData(data);
 }
@ -265,12 +349,21 @@ async function closeActiveDoc(): Promise<void> {
 // ---------- settings

 function applySettings(): void {
-  const theme = settings.theme === "system"
-    ? (matchMedia("(prefers-color-scheme: dark)").matches ? "dark" : "light")
-    : settings.theme;
+  const theme =
+    settings.theme === "system"
+      ? matchMedia("(prefers-color-scheme: dark)").matches
+        ? "dark"
+        : "light"
+      : settings.theme;
  document.documentElement.dataset.theme = theme;
-  document.documentElement.style.setProperty("--editor-font-size", `${settings.fontSize}px`);
-  $("#editor-wrap").style.setProperty("--results-width", `${settings.resultsWidth}%`);
+  document.documentElement.style.setProperty(
+    "--editor-font-size",
+    `${settings.fontSize}px`,
+  );
+  $("#editor-wrap").style.setProperty(
+    "--results-width",
+    `${settings.resultsWidth}%`,
+  );
  setLang(settings.language);
  const searchInput = $<HTMLInputElement>("#search-input");
  searchInput.placeholder = t("searchPlaceholder");
@ -283,7 +376,10 @@ function applySettings(): void {
  });
  editor?.refresh();
  syncTitleField();
-  $<HTMLElement>("#sidebar").classList.toggle("hidden", !settings.sidebarVisible);
+  $<HTMLElement>("#sidebar").classList.toggle(
+    "hidden",
+    !settings.sidebarVisible,
+  );
 }

 function bindFormattingSettings(): void {
@ -307,7 +403,10 @@ function bindFormattingSettings(): void {

  const save = () => {
    settings.theme = themeSel.value as SettingsData["theme"];
-    settings.precision = Math.max(0, Math.min(15, Number(precision.value) || 2));
+    settings.precision = Math.max(
+      0,
+      Math.min(15, Number(precision.value) || 2),
+    );
    settings.groupSeparator = groupSep.value;
    settings.decimalSeparator = decimalSep.value;
    // "1,234,56" is unreadable — a comma decimal forces a space group separator
@ -317,13 +416,27 @@ function bindFormattingSettings(): void {
    }
    settings.dateFormat = dateFmt.value as SettingsData["dateFormat"];
    settings.language = langSel.value;
-    settings.fontSize = Math.max(10, Math.min(32, Number(fontSize.value) || 15));
-    settings.resultsWidth = Math.max(20, Math.min(60, Number(resultsWidth.value) || 42));
+    settings.fontSize = Math.max(
+      10,
+      Math.min(32, Number(fontSize.value) || 15),
+    );
+    settings.resultsWidth = Math.max(
+      20,
+      Math.min(60, Number(resultsWidth.value) || 42),
+    );
    applySettings();
    void saveSettings(settings);
  };

-  for (const el of [themeSel, precision, groupSep, decimalSep, dateFmt, langSel, fontSize]) {
+  for (const el of [
+    themeSel,
+    precision,
+    groupSep,
+    decimalSep,
+    dateFmt,
+    langSel,
+    fontSize,
+  ]) {
    el.addEventListener("change", save);
  }
  resultsWidth.addEventListener("input", save); // live while sliding
@ -402,7 +515,10 @@ function bindBehaviorSettings(): void {
    void saveSettings(settings);
  });
  binDays.addEventListener("change", () => {
-    settings.deletedRetentionDays = Math.max(1, Math.min(365, Math.round(Number(binDays.value)) || 14));
+    settings.deletedRetentionDays = Math.max(
+      1,
+      Math.min(365, Math.round(Number(binDays.value)) || 14),
+    );
    binDays.value = String(settings.deletedRetentionDays);
    void saveSettings(settings);
    void runBackups(settings.dataDir, settings.deletedRetentionDays); // prune right away
@ -418,7 +534,9 @@ function bindBehaviorSettings(): void {
 function bindDataDirSettings(): void {
  const dataDirBtn = $<HTMLButtonElement>("#set-datadir");
  const renderDataDir = () => {
-    dataDirBtn.textContent = settings.dataDir ? settings.dataDir.split(/[\\/]/).pop() ?? settings.dataDir : t("defaultFolder");
+    dataDirBtn.textContent = settings.dataDir
+      ? (settings.dataDir.split(/[\\/]/).pop() ?? settings.dataDir)
+      : t("defaultFolder");
    dataDirBtn.title = settings.dataDir || t("defaultFolder");
  };
  renderDataDir();
@ -428,7 +546,11 @@ function bindDataDirSettings(): void {
    let strategy: "move" | "overwrite" | "use_existing" = "move";
    try {
      if (await dataDirHasDocuments(picked)) {
-        const ans = await askModal(t("folderConflict"), t("useExisting"), t("replaceMine"));
+        const ans = await askModal(
+          t("folderConflict"),
+          t("useExisting"),
+          t("replaceMine"),
+        );
        if (ans === null) return;
        strategy = ans === "a" ? "use_existing" : "overwrite";
      }
@ -449,7 +571,8 @@ function bindDataDirSettings(): void {
      const fresh = await loadAppData(picked);
      if (fresh && fresh.docs.length > 0) {
        data = fresh;
-        if (!data.docs.some((d) => d.id === data.activeId)) data.activeId = data.docs[0].id;
+        if (!data.docs.some((d) => d.id === data.activeId))
+          data.activeId = data.docs[0].id;
        switchDoc(data.activeId);
      }
    }
@ -458,12 +581,19 @@ function bindDataDirSettings(): void {
 }

 function bindSettingsNavigation(): void {
-  const tabs = document.querySelectorAll<HTMLButtonElement>("#settings-tabs .tab");
-  const tabPanels = document.querySelectorAll<HTMLElement>(".settings-tabpanel");
+  const tabs = document.querySelectorAll<HTMLButtonElement>(
+    "#settings-tabs .tab",
+  );
+  const tabPanels =
+    document.querySelectorAll<HTMLElement>(".settings-tabpanel");
  for (const tab of tabs) {
    tab.addEventListener("click", () => {
      for (const other of tabs) other.classList.toggle("active", other === tab);
-      for (const panel of tabPanels) panel.classList.toggle("hidden", panel.dataset.tabpanel !== tab.dataset.tab);
+      for (const panel of tabPanels)
+        panel.classList.toggle(
+          "hidden",
+          panel.dataset.tabpanel !== tab.dataset.tab,
+        );
    });
  }

@ -473,8 +603,14 @@ function bindSettingsNavigation(): void {
  $("#close-settings").addEventListener("click", () => {
    $("#settings-panel").classList.add("hidden");
  });
-  $("#open-extensions").addEventListener("click", () => void openExtensionsFolder());
-  $("#open-backups").addEventListener("click", () => void openBackupsFolder(settings.dataDir));
+  $("#open-extensions").addEventListener(
+    "click",
+    () => void openExtensionsFolder(),
+  );
+  $("#open-backups").addEventListener(
+    "click",
+    () => void openBackupsFolder(settings.dataDir),
+  );
  $("#check-update").addEventListener("click", () => void checkUpdate(true));
 }

@ -504,18 +640,39 @@ function normalizeKeyName(e: KeyboardEvent): string | null {
  if (/^Numpad\d$/.test(code)) return code;
  if (/^F\d{1,2}$/.test(code)) return code;
  const map: Record<string, string> = {
-    Space: "Space", Enter: "Enter", Backspace: "Backspace", Delete: "Delete",
-    Tab: "Tab", Home: "Home", End: "End", PageUp: "PageUp", PageDown: "PageDown",
-    ArrowUp: "Up", ArrowDown: "Down", ArrowLeft: "Left", ArrowRight: "Right",
-    Minus: "-", Equal: "=", Comma: ",", Period: ".", Slash: "/", Backquote: "`",
-    BracketLeft: "[", BracketRight: "]", Semicolon: ";", Quote: "'",
+    Space: "Space",
+    Enter: "Enter",
+    Backspace: "Backspace",
+    Delete: "Delete",
+    Tab: "Tab",
+    Home: "Home",
+    End: "End",
+    PageUp: "PageUp",
+    PageDown: "PageDown",
+    ArrowUp: "Up",
+    ArrowDown: "Down",
+    ArrowLeft: "Left",
+    ArrowRight: "Right",
+    Minus: "-",
+    Equal: "=",
+    Comma: ",",
+    Period: ".",
+    Slash: "/",
+    Backquote: "`",
+    BracketLeft: "[",
+    BracketRight: "]",
+    Semicolon: ";",
+    Quote: "'",
  };
  return map[code] ?? null;
 }

 // ---------- tauri integration

-async function registerHotkey(old: string | null, combo: string): Promise<boolean> {
+async function registerHotkey(
+  old: string | null,
+  combo: string,
+): Promise<boolean> {
  if (!isTauri()) return true;
  try {
    const gs = await import("@tauri-apps/plugin-global-shortcut");
@ -557,7 +714,9 @@ async function applyAutostart(enabled: boolean): Promise<void> {
 async function applyAlwaysOnTop(enabled: boolean): Promise<void> {
  if (!isTauri()) return;
  const { getCurrentWindow } = await import("@tauri-apps/api/window");
-  await getCurrentWindow().setAlwaysOnTop(enabled).catch((e) => logger.warn("always-on-top failed", e));
+  await getCurrentWindow()
+    .setAlwaysOnTop(enabled)
+    .catch((e) => logger.warn("always-on-top failed", e));
 }

 async function refreshRates(force = false): Promise<void> {
@ -567,7 +726,7 @@ async function refreshRates(force = false): Promise<void> {
  info.classList.remove("spin");
  if (payload) {
    liveRates = Object.fromEntries(
-      Object.entries(payload.rates).map(([k, v]) => [k, Number(v)])
+      Object.entries(payload.rates).map(([k, v]) => [k, Number(v)]),
    );
    applyAllRates();
    workspace.invalidateAll();
@ -581,7 +740,15 @@ async function refreshRates(force = false): Promise<void> {
 // ---------- market data

 // Yahoo delisted Russian tickers (SBER/GAZP) in 2022 — dropped, they always miss.
-const MARKET_SYMBOLS = ["AAPL", "MSFT", "GOOGL", "AMZN", "TSLA", "NVDA", "META"];
+const MARKET_SYMBOLS = [
+  "AAPL",
+  "MSFT",
+  "GOOGL",
+  "AMZN",
+  "TSLA",
+  "NVDA",
+  "META",
+];

 let marketPrices: Record<string, number> = {};
 let marketFetchedAt = 0;
@ -620,7 +787,9 @@ const HIST_DATE_RE = /(?:on|на)\s+(\d{4}-\d{2}-\d{2})/gi;
 async function fetchNeededHistoricalRates(text: string): Promise<void> {
  const dates = new Set<string>();
  for (const m of text.matchAll(HIST_DATE_RE)) dates.add(m[1]!);
-  const datesToFetch = Array.from(dates).filter((date) => !engine.hasHistoricalRates(date));
+  const datesToFetch = Array.from(dates).filter(
+    (date) => !engine.hasHistoricalRates(date),
+  );
  let fetched = false;
  if (datesToFetch.length > 0) {
    const results = await fetchHistoricalRatesBatch(datesToFetch);
@ -632,12 +801,18 @@ async function fetchNeededHistoricalRates(text: string): Promise<void> {
      }
    }
  }
-  if (fetched) { workspace.invalidateAll(); editor.refresh(); }
+  if (fetched) {
+    workspace.invalidateAll();
+    editor.refresh();
+  }
 }

 function renderMarketInfo(): void {
  const el = $("#market-info") as HTMLElement;
-  if (marketFetchedAt === 0) { el.classList.add("d-none"); return; }
+  if (marketFetchedAt === 0) {
+    el.classList.add("d-none");
+    return;
+  }
  el.classList.remove("d-none");
  el.textContent = `${t("market")}: ${agoText(marketFetchedAt)} ↺`;
  el.title = t("refreshRates");
@ -673,7 +848,8 @@ function agoText(unixSec: number): string {
  const s = Math.max(0, Math.floor(Date.now() / 1000) - unixSec);
  if (s < 90) return t("justNow");
  if (s < 3600) return t("minAgo").replace("{}", String(Math.round(s / 60)));
-  if (s < 86400) return t("hourAgo").replace("{}", String(Math.round(s / 3600)));
+  if (s < 86400)
+    return t("hourAgo").replace("{}", String(Math.round(s / 3600)));
  return t("dayAgo").replace("{}", String(Math.round(s / 86400)));
 }

@ -695,13 +871,21 @@ let modalChain: Promise<unknown> = Promise.resolve();
 /** two-button modal; resolves "a" | "b" | null (click outside = cancel).
    calls serialize on the shared #modal singleton — a second call waits for
    the first to resolve rather than clobbering its handlers */
-function askModal(msg: string, aLabel: string, bLabel: string): Promise<"a" | "b" | null> {
+function askModal(
+  msg: string,
+  aLabel: string,
+  bLabel: string,
+): Promise<"a" | "b" | null> {
  const run = modalChain.then(() => showModal(msg, aLabel, bLabel));
  modalChain = run.catch(() => {});
  return run;
 }

-function showModal(msg: string, aLabel: string, bLabel: string): Promise<"a" | "b" | null> {
+function showModal(
+  msg: string,
+  aLabel: string,
+  bLabel: string,
+): Promise<"a" | "b" | null> {
  return new Promise((resolve) => {
    const modal = $("#modal");
    const a = $("#modal-a");
@ -722,7 +906,8 @@ function showModal(msg: string, aLabel: string, bLabel: string): Promise<"a" | "
      // a click that just refocused the window (native dialog closing, or
      // bringing a backgrounded tray window to front) lands on the backdrop
      // too — ignore a backdrop dismiss that arrives right after refocus
-      if (e.target === modal && performance.now() - lastWindowFocusAt > 300) done(null);
+      if (e.target === modal && performance.now() - lastWindowFocusAt > 300)
+        done(null);
    };
  });
 }
@ -742,7 +927,10 @@ function toast(msg: string): void {

 async function initSettings(): Promise<void> {
  settings = await loadSettings();
-  if (!localStorage.getItem("summarum.langInit") && settings.language === "en") {
+  if (
+    !localStorage.getItem("summarum.langInit") &&
+    settings.language === "en"
+  ) {
    settings.language = detectLang();
    localStorage.setItem("summarum.langInit", "1");
  }
@ -762,19 +950,34 @@ async function initDataAndEngine(): Promise<void> {

  const stored = await loadAppData(settings.dataDir);
  // a corrupt or foreign documents.json must not crash the boot
-  if (stored && Array.isArray(stored.docs) && stored.docs.length > 0 && stored.contents && typeof stored.contents === "object") {
+  if (
+    stored &&
+    Array.isArray(stored.docs) &&
+    stored.docs.length > 0 &&
+    stored.contents &&
+    typeof stored.contents === "object"
+  ) {
    data = stored;
  } else {
    const id = uid();
-    data = { docs: [{ id, title: "Sample" }], activeId: id, contents: { [id]: welcomeText(settings.language) } };
+    data = {
+      docs: [{ id, title: "Sample" }],
+      activeId: id,
+      contents: { [id]: welcomeText(settings.language) },
+    };
  }
-  if (!data.docs.some((d) => d.id === data.activeId)) data.activeId = data.docs[0].id;
+  if (!data.docs.some((d) => d.id === data.activeId))
+    data.activeId = data.docs[0].id;

  const scripts = await loadExtensionScripts();
  await runExtensions(engine, scripts);

  workspace = new Workspace(engine, () =>
-    data.docs.map((d) => ({ id: d.id, title: d.title, text: data.contents[d.id] ?? "" })),
+    data.docs.map((d) => ({
+      id: d.id,
+      title: d.title,
+      text: data.contents[d.id] ?? "",
+    })),
  );

  editor = new SumEditor(
@ -817,7 +1020,12 @@ async function initDataAndEngine(): Promise<void> {
  search = initSearch({
    engine,
    workspace,
-    docs: () => data.docs.map((d) => ({ id: d.id, title: d.title, text: data.contents[d.id] ?? "" })),
+    docs: () =>
+      data.docs.map((d) => ({
+        id: d.id,
+        title: d.title,
+        text: data.contents[d.id] ?? "",
+      })),
    t,
    onOpen: (docId, line) => {
      if (docId !== data.activeId) switchDoc(docId);
@ -863,7 +1071,9 @@ function bindMiscUI(): void {

  $("#open-search").addEventListener("click", () => search.open());

-  window.addEventListener("focus", () => { lastWindowFocusAt = performance.now(); });
+  window.addEventListener("focus", () => {
+    lastWindowFocusAt = performance.now();
+  });
 }

 async function bindWindowControls(): Promise<void> {
@ -888,7 +1098,11 @@ function bindSidebarUI(): void {
  document.addEventListener("mousedown", (e) => {
    const target = e.target as HTMLElement;
    const panel = $("#settings-panel");
-    if (!panel.classList.contains("hidden") && !target.closest("#settings-panel") && !target.closest("#open-settings")) {
+    if (
+      !panel.classList.contains("hidden") &&
+      !target.closest("#settings-panel") &&
+      !target.closest("#open-settings")
+    ) {
      panel.classList.add("hidden");
    }
    if (!settings.sidebarVisible) return;
@ -917,7 +1131,9 @@ function bindDividerUI(): void {
      window.removeEventListener("mouseup", onUp);
      divider.classList.remove("dragging");
      document.body.style.cursor = "";
-      $<HTMLInputElement>("#set-resultswidth").value = String(settings.resultsWidth);
+      $<HTMLInputElement>("#set-resultswidth").value = String(
+        settings.resultsWidth,
+      );
      void saveSettings(settings);
    };
    window.addEventListener("mousemove", onMove);
@ -960,7 +1176,9 @@ function bindExportUI(): void {
  });
  document.addEventListener("click", () => exportMenu.classList.add("hidden"));
  exportMenu.addEventListener("click", async (e) => {
-    const btn = (e.target as HTMLElement).closest<HTMLButtonElement>("[data-action]");
+    const btn = (e.target as HTMLElement).closest<HTMLButtonElement>(
+      "[data-action]",
+    );
    if (!btn) return;
    exportMenu.classList.add("hidden");
    const action = btn.dataset.action;
@ -982,7 +1200,10 @@ function bindExportUI(): void {
      const isSum = action === "save-sum";
      const content = isSum ? editor.getText() : editor.getSheetWithResults();
      try {
-        const saved = await invoke<boolean>("write_text_file", { contents: content, isSum });
+        const saved = await invoke<boolean>("write_text_file", {
+          contents: content,
+          isSum,
+        });
        if (saved) {
          toast(t("saved"));
        }
@ -1032,11 +1253,15 @@ async function bindLifecycle(): Promise<void> {
  // update check above only ever runs once at boot — recheck periodically
  // so a long-lived process still notices new releases; re-read the setting
  // on every tick since the user can flip it while the app is running
-  setInterval(() => { if (settings.autoUpdateEnabled) void checkUpdate(); }, 6 * 60 * 60 * 1000);
+  setInterval(
+    () => {
+      if (settings.autoUpdateEnabled) void checkUpdate();
+    },
+    6 * 60 * 60 * 1000,
+  );
 }

 async function initUI(): Promise<void> {
-
  applySettings(); // sets the language before bindSettingsUI renders dynamic labels
  bindSettingsUI();
  renderDocList();
@ -1070,7 +1295,11 @@ async function checkUpdate(manual = false): Promise<void> {
    if (manual) toast(t("upToDate"));
    return;
  }
-  const choice = await askModal(t("updateAvailable").replace("{}", result.version), t("updateInstall"), t("updateLater"));
+  const choice = await askModal(
+    t("updateAvailable").replace("{}", result.version),
+    t("updateInstall"),
+    t("updateLater"),
+  );
  if (choice !== "a") return;
  toast(t("updateInstalling"));
  try {
--- a/src/ui/editor.ts
+++ b/src/ui/editor.ts
@ -170,6 +170,7 @@ export class SumEditor {
    this.resultsEl = resultsEl;

    let engineOptions: { label: string; type: string; detail?: string }[] | null = null;
+    const varPattern = /^\s*([\p{L}_][\p{L}\d_]*)\s*=/u;
    const completionSource = (ctx: CompletionContext): CompletionResult | null => {
      const word = ctx.matchBefore(/[\p{L}_]+$/u);
      if (!word || (word.from === word.to && !ctx.explicit)) return null;
@ -182,9 +183,15 @@ export class SumEditor {
      }));
      const options = [...engineOptions];
      // document variables
-      const text = ctx.state.doc.toString();
-      for (const m of text.matchAll(/^\s*([\p{L}_][\p{L}\d_]*)\s*=/gmu)) {
-        options.push({ label: m[1], type: "variable" });
+      const iter = ctx.state.doc.iterLines();
+      for (let next = iter.next(); !next.done; next = iter.next()) {
+        const line = next.value;
+        if (line.includes("=")) {
+          const m = varPattern.exec(line);
+          if (m) {
+            options.push({ label: m[1], type: "variable" });
+          }
+        }
      }
      return { from: word.from, options, validFor: /^[\p{L}_]*$/u };
    };
--- a/src/ui/search.ts
+++ b/src/ui/search.ts
@ -30,9 +30,13 @@ export interface SearchController {
  open(): void;
 }

-const $ = <T extends HTMLElement>(sel: string): T => document.querySelector(sel) as T;
+const $ = <T extends HTMLElement>(sel: string): T =>
+  document.querySelector(sel) as T;

-export function parseResultQuery(engine: SumEngine, q: string): { op: string; threshold: Value } | null {
+export function parseResultQuery(
+  engine: SumEngine,
+  q: string,
+): { op: string; threshold: Value } | null {
  const m = /^(>=|<=|>|<|=|~)\s*(.+)$/.exec(q.trim());
  if (!m) return null;
  const v = engine.evaluateExpression(m[2].trim());
@ -50,22 +54,41 @@ export function searchAllSheets(deps: SearchDeps, query: string): SearchHit[] {
    const hits: SearchHit[] = [];
    for (const doc of docs) {
      const results = deps.workspace.getCachedResults(doc);
-      const lines = doc.text.split("\n");
+      let lines: string[] | undefined;
      for (let i = 0; i < results.length; i++) {
        const r = results[i];
        if (!r.value || r.value.kind !== "quantity") continue;
        const v = r.value.value;
        let match = false;
        switch (rq.op) {
-          case ">":  match = v.gt(th); break;
-          case ">=": match = v.gte(th); break;
-          case "<":  match = v.lt(th); break;
-          case "<=": match = v.lte(th); break;
-          case "=":  match = v.eq(th); break;
-          case "~":  match = !th.isZero() && v.minus(th).abs().div(th.abs()).lte(0.01); break;
+          case ">":
+            match = v.gt(th);
+            break;
+          case ">=":
+            match = v.gte(th);
+            break;
+          case "<":
+            match = v.lt(th);
+            break;
+          case "<=":
+            match = v.lte(th);
+            break;
+          case "=":
+            match = v.eq(th);
+            break;
+          case "~":
+            match = !th.isZero() && v.minus(th).abs().div(th.abs()).lte(0.01);
+            break;
        }
        if (match) {
-          hits.push({ docId: doc.id, docTitle: doc.title, line: i + 1, text: lines[i] ?? "", result: r.text ?? undefined });
+          if (!lines) lines = doc.text.split("\n");
+          hits.push({
+            docId: doc.id,
+            docTitle: doc.title,
+            line: i + 1,
+            text: lines[i] ?? "",
+            result: r.text ?? undefined,
+          });
          if (hits.length >= 200) return hits;
        }
      }
@ -78,7 +101,12 @@ export function searchAllSheets(deps: SearchDeps, query: string): SearchHit[] {
    const lines = doc.text.split("\n");
    for (let i = 0; i < lines.length; i++) {
      if (lines[i].toLowerCase().includes(ql)) {
-        hits.push({ docId: doc.id, docTitle: doc.title, line: i + 1, text: lines[i] });
+        hits.push({
+          docId: doc.id,
+          docTitle: doc.title,
+          line: i + 1,
+          text: lines[i],
+        });
        if (hits.length >= 200) return hits;
      }
    }
@ -113,7 +141,9 @@ export function initSearch(deps: SearchDeps): SearchController {
      docEl.textContent = hit.docTitle;
      const lineEl = document.createElement("div");
      lineEl.className = "line";
-      lineEl.textContent = hit.result ? `${hit.text} = ${hit.result}` : hit.text;
+      lineEl.textContent = hit.result
+        ? `${hit.text} = ${hit.result}`
+        : hit.text;
      item.append(docEl, lineEl);
      item.addEventListener("click", () => {
        deps.onOpen(hit.docId, hit.line);
--- a/src/workspace.test.ts
+++ b/src/workspace.test.ts
@ -44,6 +44,19 @@ describe("Workspace exports", () => {
  });
 });

+describe("Workspace error handling", () => {
+  it("cleans up the resolving set if evaluation throws an unexpected error", () => {
+    const { ws, engine } = makeWorkspace({
+      a: { title: "A", text: "1 + 1" },
+    });
+    vi.spyOn(engine, "evaluateDocument").mockImplementation(() => {
+      throw new Error("mocked crash");
+    });
+    expect(() => ws.evaluateSheet("a", "1 + 1")).toThrowError("mocked crash");
+    expect((ws as any).resolving.has("a")).toBe(false);
+  });
+});
+
 describe("Workspace invalidation", () => {
  it("invalidating a sheet also invalidates its dependents, not unrelated sheets", () => {
    const { ws, store } = makeWorkspace({
--- a/src/workspace.ts
+++ b/src/workspace.ts
@ -54,10 +54,11 @@ export class Workspace {
  invalidate(sheetId: string): void {
    this.titleCache = null;
    const dirty = new Set<string>([sheetId]);
+    const sheetsList = this.sheets();
    let changed = true;
    while (changed) {
      changed = false;
-      for (const s of this.sheets()) {
+      for (const s of sheetsList) {
        if (dirty.has(s.id)) continue;
        for (const title of this.referencedTitles(s.text, s.id)) {
          const target = this.findSheetByTitle(title);
Author	SHA1	Message	Date
Horizontal42	bede889ced	ci: fix tauri --ci flag in woodpecker	2026-09-20 02:35:05 +03:00
Horizontal42	617a295084	ci: add clippy component in rust container	2026-09-20 02:26:02 +03:00
Horizontal42	8de1925be6	ci: add woodpecker pipeline for build and tests	2026-09-20 02:22:50 +03:00
Horizontal42	37cfd2144b	update docs: fix test count (373 not 259), add missing files to arch tree - vitest actually runs 373 cases across 21 files, not 259 - added workspace.ts, sparkline.ts, logger.ts to the file tree in ARCHITECTURE - fixes in all four language variants: README + ARCHITECTURE in EN and RU	2026-08-23 18:45:27 +03:00
Horizontal42	663b2ccab8	sync package-lock.json with 1.2.9	2026-08-19 16:52:30 +03:00
Horizontal42	a4b69ec9e7	sync Cargo.lock with 1.2.9	2026-08-19 16:50:11 +03:00
Horizontal42	b91f650c31	update tauri.conf version to 1.2.9	2026-08-19 16:49:57 +03:00
Horizontal42	1cd9807543	bump cargo version to 1.2.9	2026-08-19 16:49:50 +03:00
Horizontal42	942f963c9d	bump version to 1.2.9	2026-08-19 16:49:43 +03:00
Horizontal42	786dbe3daa	Refactor evalCall to use BUILTIN_FUNCS lookup object (#103 ) Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>	2026-08-19 16:47:06 +03:00
Horizontal42	70492159e6	⚡ Unnecessary DOM writes in drag mousemove event (#98 ) * perf: Optimize DOM writes in drag mousemove event Optimizes the drag-and-drop `mousemove` event handler by caching the previously hovered element. The `drag-over` class is now only removed from `prevOver` and added to the new hover target, instead of looping through all `cachedItems` to remove the class on every move. This eliminates layout thrashing and high CPU usage during drag operations. Co-authored-by: Horizontal42 <75383519+Horizontal42@users.noreply.github.com> * drop stray benchmark script --------- Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>	2026-08-19 16:44:07 +03:00
Horizontal42	203c4b4efd	refactor: use switch statement in parser loop for readability (#101 ) Replaces the deeply nested if-chain inside the Pratt parser loop in `src/engine/parser.ts` with a `switch` statement over token types. Introduces a labeled `loop: for(;;)` to maintain accurate `continue`/`break` semantics while greatly enhancing the visual parsing and extensibility of the logic without hurting evaluation speed. Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>	2026-08-19 16:36:38 +03:00
Horizontal42	34d2defa82	Refactor: Extract `removeDocById` helper for document filtering (#112 ) Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>	2026-08-19 16:36:35 +03:00
Horizontal42	12ae91da2e	perf(engine): reuse Decimal(0) and Decimal(1) instances (#106 ) Added exported constants `DEC_ZERO` and `DEC_ONE` in `src/engine/types.ts` and replaced all instances of `new Decimal(0)` and `new Decimal(1)` across `src/engine/evaluator.ts` with these constants. This reduces unnecessary memory allocations and garbage collection overhead in the evaluator engine, especially during hot loops like goal seek (root finding). Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>	2026-08-19 16:36:10 +03:00
Horizontal42	1e80c55011	Refactor parseLine logic in src/engine/parser.ts (#100 ) Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>	2026-08-19 16:36:05 +03:00
Horizontal42	62f55b10a9	Extract getDocById helper function (#97 ) - Extracts `data.docs.find((d) => d.id === ...)` into a helper function to deduplicate finding document logic. - Cleans up an unused `data` parameter on `setupDocInteraction`. Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>	2026-08-19 16:36:02 +03:00
Horizontal42	5158771aeb	Add test suite for application main entry point (#114 ) Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>	2026-08-19 16:35:49 +03:00
Horizontal42	8c50fc8aa9	🔒 [security fix] Remove unsafe path canonicalization in directory gate (#111 ) * 🔒 [security fix] Remove unsafe path canonicalization in directory gate 🎯 What: Removed filesystem-level path canonicalization in the DataDirGate check (`canon_or_raw`). ⚠️ Risk: An attacker could bypass directory authorization by creating a symlink to an authorized directory, allowing them to redirect arbitrary path reads/writes via TOCTOU (Time-of-Check to Time-of-Use) attacks or misleading unverified paths. 🛡️ Solution: Replaced `fs::canonicalize` with purely lexical path normalization (resolving `.` and `..` in memory) to ensure strict string match validation without following symlinks. Ensure relative paths with `..` that go above the start are handled securely. Co-authored-by: Horizontal42 <75383519+Horizontal42@users.noreply.github.com> * 🔒 [security fix] Remove unsafe path canonicalization in directory gate 🎯 What: Removed filesystem-level path canonicalization in the DataDirGate check (`canon_or_raw`). ⚠️ Risk: An attacker could bypass directory authorization by creating a symlink to an authorized directory, allowing them to redirect arbitrary path reads/writes via TOCTOU (Time-of-Check to Time-of-Use) attacks or misleading unverified paths. 🛡️ Solution: Replaced `fs::canonicalize` with purely lexical path normalization (resolving `.` and `..` in memory) to ensure strict string match validation without following symlinks. Ensure relative paths with `..` that go above the start are handled securely without dropping components incorrectly. Added proper Iterator methods to appease clippy. Co-authored-by: Horizontal42 <75383519+Horizontal42@users.noreply.github.com> --------- Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>	2026-08-19 16:35:45 +03:00
Horizontal42	ddb51ee9f9	Refactor registerCoreVocab to reduce duplication (#110 ) Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>	2026-08-19 16:35:41 +03:00
Horizontal42	cba2286371	🧹 [Extract evaluateText helper in tests] (#109 ) Extracted `evaluateText` helper function in `src/engine/edge.test.ts` to replace the repeated mapping `eng.evaluateDocument(doc).map((x) => x.text)`. Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>	2026-08-19 16:35:37 +03:00
Horizontal42	19a9631709	perf(workspace): cache sheet list during invalidate loop (#107 ) Moved the evaluation of `this.sheets()` outside of the `while (changed)` invalidation loop to avoid redundant evaluations and allocations on deep dependency chains. Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>	2026-08-19 16:35:33 +03:00
Horizontal42	d166820b28	test: add coverage for workspace evaluation error cleanup (#105 ) Adds a test to `src/workspace.test.ts` to ensure that when `engine.evaluateDocument` throws an exception, the `this.resolving` set is correctly cleaned up in the `finally` block of `doEvaluate`. Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>	2026-08-19 16:35:29 +03:00
Horizontal42	22302b57cc	perf: defer document string split allocation in numeric search (#104 ) In `src/ui/search.ts`, numeric threshold searches previously called `doc.text.split("\n")` eagerly on every open document. This commit changes `lines` to be lazily allocated only if an actual numeric search match is found, eliminating unnecessary memory allocations and loop overhead on documents that do not match. Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>	2026-08-19 16:35:26 +03:00
Horizontal42	289ae8aa3f	⚡ [perf: avoid expensive doc stringification for autocomplete] (#102 ) * perf: avoid expensive doc stringification for autocomplete Refactored the autocomplete variable matching logic in `src/ui/editor.ts` to iterate through document lines using CodeMirror's `iterLines()` instead of allocating the entire document string in memory with `toString()`. Also pulled the regex up and introduced a quick `.includes("=")` bailout to skip the regex engine completely for most lines. Co-authored-by: Horizontal42 <75383519+Horizontal42@users.noreply.github.com> * drop stray benchmark script --------- Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>	2026-08-19 16:35:21 +03:00
Horizontal42	d528aa9bbb	test: add unit tests for logger utility (#96 ) Adds a test file `src/logger.test.ts` to verify that `logger.info`, `logger.warn`, and `logger.error` correctly call the underlying console methods with the passed arguments. Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>	2026-08-19 16:35:18 +03:00
Horizontal42	868a34497b	cargo fmt	2026-08-19 04:17:58 +03:00