\n \n {/* Horizontal grid lines at each y-tick */}\n {yTicks.map((v) => (\n \n ))}\n\n {/* Y-axis labels */}\n {yTicks.map((v) => (\n \n ${(v / 100).toFixed(0)}\n \n ))}\n\n {/* Bars */}\n {data.map((d, i) => {\n const barH = (d.total_cents / maxValue) * chartH;\n return (\n \n );\n })}\n\n {/* Rolling average line */}\n \n\n {/* Rolling average dots */}\n {data.map((d, i) => (\n \n ))}\n\n {/* X-axis labels */}\n {data.map((d, i) => {\n if (i % xLabelEvery !== 0 && i !== n - 1) return null;\n return (\n \n {formatShortDate(d.day)}\n \n );\n })}\n \n

\n );\n}\n\ninterface Props {\n onBack: () => void;\n}\n\nexport default function HistoryPage({ onBack }: Props) {\n const [period, setPeriod] = useState(\"week\");\n const [totalCents, setTotalCents] = useState(0);\n const [chartData, setChartData] = useState([]);\n const [loadingTotal, setLoadingTotal] = useState(true);\n const [loadingChart, setLoadingChart] = useState(true);\n\n useEffect(() => {\n fetchTotal(period);\n }, [period]);\n\n useEffect(() => {\n fetchChart();\n }, []);\n\n const fetchTotal = async (p: Period) => {\n setLoadingTotal(true);\n try {\n const resp = await fetch(`/api/savings?period=${p}`);\n const data = await resp.json();\n setTotalCents(data.total_cents ?? 0);\n } catch (err) {\n console.error(\"Failed to fetch savings:\", err);\n } finally {\n setLoadingTotal(false);\n }\n };\n\n const fetchChart = async () => {\n setLoadingChart(true);\n try {\n const resp = await fetch(\"/api/savings/chart\");\n const data = await resp.json();\n setChartData(data.days ?? []);\n } catch (err) {\n console.error(\"Failed to fetch chart:\", err);\n } finally {\n setLoadingChart(false);\n }\n };\n\n return (\n \n {/* ── Header: back button ── */}\n \n \n ←\n \n \n\n {/* ── Period selector pills ── */}\n

\n {PERIODS.map(({ label, value }) => (\n setPeriod(value)}\n style={{\n flex: 1,\n padding: \"10px 0\",\n borderRadius: \"50px\",\n border: \"none\",\n cursor: \"pointer\",\n fontSize: \"15px\",\n fontWeight: period === value ? 500 : 300,\n fontFamily: FONT,\n backgroundColor: period === value ? \"#FFCF48\" : \"#f3f4f6\",\n color: \"#000000\",\n transition: \"background-color 0.15s ease\",\n }}\n >\n {label}\n \n ))}\n

\n\n {/* ── Dashed divider ── */}\n

\n\n {/* ── Total saved display ── */}\n \n \n Total Saved\n

\n \n {formatCents(totalCents)}\n \n \n\n {/* ── Dashed divider ── */}\n

\n\n {/* ── Chart ── */}\n

\n \n Last 30 Days\n

\n\n {loadingChart ? (\n \n Loading…\n

\n ) : chartData.length === 0 ? (\n \n No data yet — start saving!\n \n ) : (\n \n )}\n\n {/* Legend */}\n {chartData.length > 0 && (\n \n

\n \n Daily total\n

\n \n 7-day avg\n

\n \n )}\n \n \n );\n}\n",[],[277,283,308],{"_110":316,"_102":317,"_169":318,"_171":284,"_172":154,"_173":153,"_175":176,"_112":319,"_107":174,"_178":224,"_180":320,"_181":22,"_182":-5,"_183":321,"_105":322},"d2b4a91c-3a30-11f1-8bb9-42b51c65c3df","MainPage.tsx","b7f7f0d2-39a1-11f1-8ee4-42b51c65c3df",["D",1776411679206],"/** @jsxImportSource https://esm.sh/react@18.2.0 */\nimport { useState, useRef } from \"https://esm.sh/react@18.2.0\";\nimport CoinExplosion from \"./CoinExplosion.tsx\";\n\ntype Mode = \"none\" | \"inputs\" | \"direct\" | \"buttons\";\n\nconst PRESET_BUTTONS: { label: string; cents: number }[] = [\n { label: \"$1\", cents: 100 },\n { label: \"$2\", cents: 200 },\n { label: \"$3\", cents: 300 },\n { label: \"$4\", cents: 400 },\n { label: \"5¢\", cents: 5 },\n { label: \"10¢\", cents: 10 },\n { label: \"20¢\", cents: 20 },\n { label: \"50¢\", cents: 50 },\n];\n\n// Raw digit string treated as cents: \"300\" → 300 cents → $3.00\nfunction centsFromDigits(digits: string): number {\n return parseInt(digits.replace(/\\D/g, \"\") || \"0\", 10);\n}\n\nfunction formatCents(cents: number): string {\n const abs = Math.abs(cents);\n const sign = cents < 0 ? \"-\" : \"\";\n return `${sign}$${(abs / 100).toFixed(2)}`;\n}\n\nconst FONT = '-apple-system, BlinkMacSystemFont, \"SF Pro Display\", \"Helvetica Neue\", sans-serif';\n\ninterface Props {\n onHistory: () => void;\n}\n\nexport default function MainPage({ onHistory }: Props) {\n const [mode, setMode] = useState(\"none\");\n const [input1Digits, setInput1Digits] = useState(\"\");\n const [input2Digits, setInput2Digits] = useState(\"\");\n const [directDigits, setDirectDigits] = useState(\"\");\n const [buttonCents, setButtonCents] = useState(0);\n const [explosion, setExplosion] = useState<{ x: number; y: number } | null>(null);\n\n const submitRef = useRef(null);\n const directInputRef = useRef(null);\n\n // Compute the displayed amount based on the active mode\n let amountCents = 0;\n if (mode === \"inputs\") {\n amountCents = centsFromDigits(input1Digits) - centsFromDigits(input2Digits);\n } else if (mode === \"direct\") {\n amountCents = centsFromDigits(directDigits);\n } else if (mode === \"buttons\") {\n amountCents = buttonCents;\n }\n\n const isNegative = amountCents < 0;\n const canSubmit = amountCents > 0;\n\n const resetAll = () => {\n setMode(\"none\");\n setInput1Digits(\"\");\n setInput2Digits(\"\");\n setDirectDigits(\"\");\n setButtonCents(0);\n };\n\n const handleInput1Change = (e: React.ChangeEvent) => {\n const digits = e.target.value.replace(/\\D/g, \"\");\n setInput1Digits(digits);\n if (mode !== \"inputs\") {\n setMode(\"inputs\");\n setDirectDigits(\"\");\n setButtonCents(0);\n }\n };\n\n const handleInput2Change = (e: React.ChangeEvent) => {\n const digits = e.target.value.replace(/\\D/g, \"\");\n setInput2Digits(digits);\n if (mode !== \"inputs\") {\n setMode(\"inputs\");\n setDirectDigits(\"\");\n setButtonCents(0);\n }\n };\n\n const handleInput1Focus = () => {\n if (mode !== \"inputs\") {\n setMode(\"inputs\");\n setDirectDigits(\"\");\n setButtonCents(0);\n }\n };\n\n const handleInput2Focus = () => {\n if (mode !== \"inputs\") {\n setMode(\"inputs\");\n setDirectDigits(\"\");\n setButtonCents(0);\n }\n };\n\n const handleDirectChange = (e: React.ChangeEvent) => {\n const digits = e.target.value.replace(/\\D/g, \"\");\n setDirectDigits(digits);\n };\n\n const handleAmountSavedClick = () => {\n setMode(\"direct\");\n setInput1Digits(\"\");\n setInput2Digits(\"\");\n setButtonCents(0);\n setDirectDigits(\"\");\n setTimeout(() => directInputRef.current?.focus(), 0);\n };\n\n const handleButtonPress = (cents: number) => {\n if (mode === \"buttons\") {\n setButtonCents((prev) => prev + cents);\n } else {\n setMode(\"buttons\");\n setInput1Digits(\"\");\n setInput2Digits(\"\");\n setDirectDigits(\"\");\n setButtonCents(cents);\n }\n };\n\n const handleSubmit = async () => {\n if (!canSubmit) return;\n try {\n const resp = await fetch(\"/api/savings\", {\n method: \"POST\",\n headers: { \"Content-Type\": \"application/json\" },\n body: JSON.stringify({ amount_cents: amountCents }),\n });\n if (resp.ok) {\n const rect = submitRef.current?.getBoundingClientRect();\n if (rect) {\n setExplosion({\n x: rect.left + rect.width / 2,\n y: rect.top + rect.height / 2,\n });\n }\n resetAll();\n }\n } catch (err) {\n console.error(\"Failed to save:\", err);\n }\n };\n\n // Colors\n const bgColor = isNegative ? \"#ef4444\" : \"#ffffff\";\n const textColor = isNegative ? \"#ffffff\" : \"#000000\";\n const dividerColor = isNegative ? \"rgba(255,255,255,0.4)\" : \"#000000\";\n const coinImageUrl = isNegative\n ? \"https://imagedelivery.net/iHX6Ovru0O7AjmyT5yZRoA/3e5cc027-0802-4ec0-e93e-92d625d3ab00/public\"\n : canSubmit\n ? \"https://imagedelivery.net/iHX6Ovru0O7AjmyT5yZRoA/080dd1f7-c03c-4691-34f6-39e8410c2200/public\"\n : \"https://imagedelivery.net/iHX6Ovru0O7AjmyT5yZRoA/a1c8fc2f-cd18-4300-ec65-35c1cb3b5900/public\";\n\n return (\n \n {/* ── Input row: minus sign + two stacked inputs ── */}\n \n {/* Minus sign, vertically centered between the two inputs */}\n \n −\n \n\n {/* Inputs stacked */}\n

\n {/* Input 1: would-have-spent */}\n \n {/* Input 2: actually-spent */}\n \n

\n \n\n {/* ── Solid divider line ── */}\n \n\n {/* ── Amount Saved display / direct input ── */}\n \n {mode === \"direct\" ? (\n \n ) : (\n \n {formatCents(amountCents)}\n \n )}\n \n\n {/* ── Submit button ── */}\n \n \n \n \n \n\n {/* ── Dashed divider ── */}\n

\n\n {/* ── Preset buttons (2 rows × 4) ── */}\n \n {PRESET_BUTTONS.map(({ label, cents }) => (\n handleButtonPress(cents)}\n style={{\n aspectRatio: \"1\",\n borderRadius: \"50%\",\n backgroundColor: \"#FFCF48\",\n border: \"none\",\n cursor: \"pointer\",\n fontSize: \"clamp(16px, 6vw, 26px)\",\n fontWeight: 300,\n fontFamily: FONT,\n display: \"flex\",\n alignItems: \"center\",\n justifyContent: \"center\",\n color: \"#000000\",\n }}\n >\n {label}\n \n ))}\n

\n\n {/* ── Dashed divider ── */}\n

\n\n {/* ── History icon (bottom right) ── */}\n \n \n {/* Increasing bars icon matching Figma vector */}\n \n \n

\n\n {/* ── Coin explosion overlay ── */}\n {explosion && (\n setExplosion(null)}\n />\n )}\n \n );\n}\n",[],[277,283,317],[277,283],{"_110":325,"_102":326,"_169":327,"_171":278,"_172":154,"_173":153,"_175":176,"_112":328,"_107":329,"_178":192,"_180":330,"_181":22,"_182":-5,"_183":331,"_105":332},"d2b55146-3a30-11f1-8bb9-42b51c65c3df","index.html","b7e6217c-39a1-11f1-9699-42b51c65c3df",["D",1776411679206],4,"\n\n \n \n \n boymath\n\n \n \n\n \n \n \n \n \n\n \n \n\n \n \n \n \n

\n \n \n \n \n\n",[],[277,326],{"_110":334,"_102":335,"_169":336,"_171":278,"_172":154,"_173":337,"_175":176,"_112":338,"_107":33,"_178":224,"_180":339,"_181":22,"_182":-5,"_183":340,"_105":341},"b83835a2-39a1-11f1-aa77-42b51c65c3df","index.tsx","b8383656-39a1-11f1-aa77-42b51c65c3df",15,["D",1776350216819],"/** @jsxImportSource https://esm.sh/react@18.2.0 */\nimport { createRoot } from \"https://esm.sh/react-dom@18.2.0/client?deps=react@18.2.0\";\nimport App from \"./components/App.tsx\";\n\nconst container = document.getElementById(\"root\")!;\nconst root = createRoot(container);\nroot.render();\n",[],[277,335],{"_110":343,"_102":344,"_169":345,"_171":278,"_172":154,"_173":346,"_175":176,"_112":347,"_107":174,"_178":192,"_180":348,"_181":22,"_182":-5,"_183":349,"_105":350},"c7734188-39ab-11f1-a758-42b51c65c3df","manifest.json","44b969c8-39a3-11f1-b06a-42b51c65c3df",42,["D",1776354537304],"{\n \"name\": \"boymath\",\n \"short_name\": \"boymath\",\n \"description\": \"Track your daily savings\",\n \"start_url\": \"/\",\n \"display\": \"standalone\",\n \"background_color\": \"#ffffff\",\n \"theme_color\": \"#ffffff\",\n \"orientation\": \"portrait-primary\",\n \"icons\": [\n {\n \"src\": \"https://i.imgur.com/VbFkf2o.png\",\n \"sizes\": \"192x192\",\n \"type\": \"image/png\",\n \"purpose\": \"any\"\n },\n {\n \"src\": \"https://i.imgur.com/MlRJetm.png\",\n \"sizes\": \"512x512\",\n \"type\": \"image/png\",\n \"purpose\": \"maskable\"\n }\n ]\n}\n",[],[277,344],{"_110":352,"_102":353,"_169":354,"_171":278,"_172":154,"_173":355,"_175":176,"_112":356,"_107":33,"_178":224,"_180":357,"_181":22,"_182":-5,"_183":358,"_105":359},"44cc484a-39a3-11f1-84b5-42b51c65c3df","sw.js","44cc48e0-39a3-11f1-84b5-42b51c65c3df",29,["D",1776350882100],"// boymath service worker\n// Caches the app shell so it loads instantly and works offline.\n\nconst CACHE = \"boymath-v1\";\n\n// Pre-cache the app shell on install\nself.addEventListener(\"install\", (e) => {\n e.waitUntil(\n caches.open(CACHE).then((cache) => cache.add(\"/\"))\n );\n self.skipWaiting();\n});\n\n// Remove old caches on activate\nself.addEventListener(\"activate\", (e) => {\n e.waitUntil(\n caches.keys().then((keys) =>\n Promise.all(keys.filter((k) => k !== CACHE).map((k) => caches.delete(k)))\n )\n );\n self.clients.claim();\n});\n\nself.addEventListener(\"fetch\", (e) => {\n const url = new URL(e.request.url);\n\n // Let API calls go straight to the network; fail gracefully offline\n if (url.pathname.startsWith(\"/api/\")) {\n e.respondWith(\n fetch(e.request).catch(\n () =>\n new Response(JSON.stringify({ error: \"offline\" }), {\n status: 503,\n headers: { \"Content-Type\": \"application/json\" },\n })\n )\n );\n return;\n }\n\n // For page navigations: network first, fall back to cached shell\n if (e.request.mode === \"navigate\") {\n e.respondWith(\n fetch(e.request)\n .then((res) => {\n // Update the cache with the fresh shell\n const clone = res.clone();\n caches.open(CACHE).then((c) => c.put(\"/\", clone));\n return res;\n })\n .catch(() => caches.match(\"/\"))\n );\n return;\n }\n\n // For all other requests: cache first, then network\n e.respondWith(\n caches.match(e.request).then(\n (cached) =>\n cached ||\n fetch(e.request).then((res) => {\n if (res.ok) {\n const clone = res.clone();\n caches.open(CACHE).then((c) => c.put(e.request, clone));\n }\n return res;\n })\n )\n );\n});\n",[],[277,353],[277],{"_110":362,"_102":363,"_169":364,"_171":-5,"_172":154,"_173":329,"_175":176,"_112":365,"_107":33,"_178":179,"_180":-5,"_181":22,"_182":-5,"_183":366,"_105":376},"b6fea78e-39a1-11f1-aa77-42b51c65c3df","shared","b6fea900-39a1-11f1-aa77-42b51c65c3df",["D",1776350214771],[367],{"_110":368,"_102":369,"_169":370,"_171":364,"_172":154,"_173":371,"_175":176,"_112":372,"_107":33,"_178":224,"_180":373,"_181":22,"_182":-5,"_183":374,"_105":375},"b897aafa-39a1-11f1-b2d2-42b51c65c3df","types.ts","b897aba4-39a1-11f1-b2d2-42b51c65c3df",22,["D",1776350217191],"// Shared types for boymath savings tracker.\n// This file must work in both the browser (frontend) and Deno (backend).\n// Do NOT use the Deno keyword here.\n\nexport interface SavingsRecord {\n id: number;\n amount_cents: number;\n recorded_at: string;\n}\n\nexport interface ChartDataPoint {\n day: string; // ISO date string, e.g. \"2026-04-16\"\n total_cents: number;\n rolling_avg_cents: number;\n}\n\nexport interface SavingsResponse {\n total_cents: number;\n records: SavingsRecord[];\n}\n\nexport interface ChartResponse {\n days: ChartDataPoint[];\n}\n",[],[363,369],[363],{"_110":378,"_102":379,"_169":380,"_171":-5,"_172":154,"_173":153,"_175":176,"_112":381,"_107":191,"_178":192,"_180":382,"_181":22,"_182":-5,"_183":383,"_105":384},"d2b44c92-3a30-11f1-8bb9-42b51c65c3df",".vtignore","b89c2c24-39a1-11f1-aae8-42b51c65c3df",["D",1776411679206],".git\n.vscode\n.cursorrules\n.DS_Store\nnode_modules\nvendor\n\nassets\n/assets\n",[],[379],{"_110":386,"_102":387,"_169":388,"_171":-5,"_172":154,"_173":389,"_175":176,"_112":390,"_107":33,"_178":192,"_180":391,"_181":22,"_182":-5,"_183":392,"_105":393},"b87f267e-39a1-11f1-a76b-42b51c65c3df","AGENTS.md","b87f275a-39a1-11f1-a76b-42b51c65c3df",20,["D",1776350217296],"You are an advanced assistant specialized in generating Val Town code.\n\n## Core Guidelines\n\n- Ask clarifying questions when requirements are ambiguous\n- Provide complete, functional solutions rather than skeleton implementations\n- Test your logic against edge cases before presenting the final solution\n- Ensure all code follows Val Town's specific platform requirements\n- If a section of code that you're working on is getting too complex, consider refactoring it into subcomponents\n\n## Code Standards\n\n- Generate code in TypeScript or TSX\n- Add appropriate TypeScript types and interfaces for all data structures\n- Prefer official SDKs or libraries than writing API calls directly\n- Ask the user to supply API or library documentation if you are at all unsure about it\n- **Never bake in secrets into the code** - always use environment variables\n- Include comments explaining complex logic (avoid commenting obvious operations)\n- Follow modern ES6+ conventions and functional programming practices if possible\n\n## Types of triggers\n\n### 1. HTTP Trigger\n\n- Create web APIs and endpoints\n- Handle HTTP requests and responses\n- Example structure:\n\n```ts\nexport default async function (req: Request) {\n return new Response(\"Hello World\");\n}\n```\n\nFiles that are HTTP triggers have http in their name like `foobar.http.tsx`\n\n### 2. Cron Triggers\n\n- Run on a schedule\n- Use cron expressions for timing\n- Example structure:\n\n```ts\nexport default async function () {\n // Scheduled task code\n}\n```\n\nFiles that are Cron triggers have cron in their name like `foobar.cron.tsx`\n\n### 3. Email Triggers\n\n- Process incoming emails\n- Handle email-based workflows\n- Example structure:\n\n```ts\nexport default async function (email: Email) {\n // Process email\n}\n```\n\nFiles that are Email triggers have email in their name like `foobar.email.tsx`\n\n\n## Val Town Standard Libraries\n\nVal Town provides several hosted services and utility functions.\n\n### Blob Storage\n\n```ts\nimport { blob } from \"https://esm.town/v/std/blob\";\nawait blob.setJSON(\"myKey\", { hello: \"world\" });\nlet blobDemo = await blob.getJSON(\"myKey\");\nlet appKeys = await blob.list(\"app_\");\nawait blob.delete(\"myKey\");\n```\n\n### SQLite\n\n```ts\nimport { sqlite } from \"https://esm.town/v/stevekrouse/sqlite\";\nconst TABLE_NAME = 'todo_app_users_2';\n// Create table - do this before usage and change table name when modifying schema\nawait sqlite.execute(`CREATE TABLE IF NOT EXISTS ${TABLE_NAME} (\n id INTEGER PRIMARY KEY AUTOINCREMENT,\n name TEXT NOT NULL\n)`);\n// Query data\nconst result = await sqlite.execute(`SELECT * FROM ${TABLE_NAME} WHERE id = ?`, [1]);\n```\n\nNote: When changing a SQLite table's schema, change the table's name (e.g., add _2 or _3) to create a fresh table.\n\n### OpenAI\n\n```ts\nimport { OpenAI } from \"https://esm.town/v/std/openai\";\nconst openai = new OpenAI();\nconst completion = await openai.chat.completions.create({\n messages: [\n { role: \"user\", content: \"Say hello in a creative way\" },\n ],\n model: \"gpt-4o-mini\",\n max_tokens: 30,\n});\n```\n\n### Email\n\n```ts\nimport { email } from \"https://esm.town/v/std/email\";\n// By default emails the owner of the val\nawait email({ \n subject: \"Hi\", \n text: \"Hi\", \n html: \"

Hi

\"\n});\n```\n\n## Val Town Utility Functions\n\nVal Town provides several utility functions to help with common project tasks.\n\n### Importing Utilities\n\nAlways import utilities with version pins to avoid breaking changes:\n\n```ts\nimport { parseProject, readFile, serveFile } from \"https://esm.town/v/std/utils@85-main/index.ts\";\n```\n\n### Available Utilities\n\n\n#### **serveFile** - Serve project files with proper content types\n\nFor example, in Hono:\n\n```ts\n// serve all files in frontend/ and shared/\napp.get(\"/frontend/*\", c => serveFile(c.req.path, import.meta.url));\napp.get(\"/shared/*\", c => serveFile(c.req.path, import.meta.url));\n```\n\n#### **readFile** - Read files from within the project:\n\n```ts\n// Read a file from the project\nconst fileContent = await readFile(\"/frontend/index.html\", import.meta.url);\n```\n\n#### **listFiles** - List all files in the project\n\n```ts\nconst files = await listFiles(import.meta.url);\n```\n\n#### **parseProject** - Extract information about the current project from import.meta.url\n\nThis is useful for including info for linking back to a val, ie in \"view source\" urls:\n\n```ts\nconst projectVal = parseProject(import.meta.url);\nconsole.log(projectVal.username); // Owner of the project\nconsole.log(projectVal.name); // Project name\nconsole.log(projectVal.version); // Version number\nconsole.log(projectVal.branch); // Branch name\nconsole.log(projectVal.links.self.project); // URL to the project page\n```\n\nHowever, it's *extremely importing* to note that `parseProject` and other Standard Library utilities ONLY RUN ON THE SERVER.\nIf you need access to this data on the client, run it in the server and pass it to the client by splicing it into the HTML page\nor by making an API request for it.\n\n## Val Town Platform Specifics\n\n- **Redirects:** Use `return new Response(null, { status: 302, headers: { Location: \"/place/to/redirect\" }})` instead of `Response.redirect` which is broken\n- **Images:** Avoid external images or base64 images. Use emojis, unicode symbols, or icon fonts/libraries instead\n- **AI Image:** To inline generate an AI image use: `

`\n- **Storage:** DO NOT use the Deno KV module for storage\n- **Browser APIs:** DO NOT use the `alert()`, `prompt()`, or `confirm()` methods\n- **Weather Data:** Use open-meteo for weather data (doesn't require API keys) unless otherwise specified\n- **View Source:** Add a view source link by importing & using `import.meta.url.replace(\"ems.sh\", \"val.town)\"` (or passing this data to the client) and include `target=\"_top\"` attribute\n- **Error Debugging:** Add `` to HTML to capture client-side errors\n- **Error Handling:** Only use try...catch when there's a clear local resolution; Avoid catches that merely log or return 500s. Let errors bubble up with full context\n- **Environment Variables:** Use `Deno.env.get('keyname')` when you need to, but generally prefer APIs that don't require keys\n- **Imports:** Use `https://esm.sh` for npm and Deno dependencies to ensure compatibility on server and browser\n- **Storage Strategy:** Only use backend storage if explicitly required; prefer simple static client-side sites\n- **React Configuration:** When using React libraries, pin versions with `?deps=react@18.2.0,react-dom@18.2.0` and start the file with `/** @jsxImportSource https://esm.sh/react@18.2.0 */`\n- Ensure all React dependencies and sub-dependencies are pinned to the same version\n- **Styling:** Default to using TailwindCSS via `` unless otherwise specified\n\n## Project Structure and Design Patterns\n\n### Recommended Directory Structure\n```\n├── backend/\n│ ├── database/\n│ │ ├── migrations.ts # Schema definitions\n│ │ ├── queries.ts # DB query functions\n│ │ └── README.md\n│ └── routes/ # Route modules\n│ ├── [route].ts\n│ └── static.ts # Static file serving\n│ ├── index.ts # Main entry point\n│ └── README.md\n├── frontend/\n│ ├── components/\n│ │ ├── App.tsx\n│ │ └── [Component].tsx\n│ ├── favicon.svg\n│ ├── index.html # Main HTML template\n│ ├── index.tsx # Frontend JS entry point\n│ ├── README.md\n│ └── style.css\n├── README.md\n└── shared/\n ├── README.md\n └── utils.ts # Shared types and functions\n```\n\n### Backend (Hono) Best Practices\n\n- Hono is the recommended API framework\n- Main entry point should be `backend/index.ts`\n- **Static asset serving:** Use the utility functions to read and serve project files:\n ```ts\n import { readFile, serveFile } from \"https://esm.town/v/std/utils@85-main/index.ts\";\n \n // serve all files in frontend/ and shared/\n app.get(\"/frontend/*\", c => serveFile(c.req.path, import.meta.url));\n app.get(\"/shared/*\", c => serveFile(c.req.path, import.meta.url));\n \n // For index.html, often you'll want to bootstrap with initial data\n app.get(\"/\", async c => {\n let html = await readFile(\"/frontend/index.html\", import.meta.url);\n \n // Inject data to avoid extra round-trips\n const initialData = await fetchInitialData();\n const dataScript = ``;\n \n html = html.replace(\"\", `${dataScript}`);\n return c.html(html);\n });\n ```\n- Create RESTful API routes for CRUD operations\n- Always include this snippet at the top-level Hono app to re-throwing errors to see full stack traces:\n ```ts\n // Unwrap Hono errors to see original error details\n app.onError((err, c) => {\n throw err;\n });\n ```\n\n### Database Patterns\n- Run migrations on startup or comment out for performance\n- Change table names when modifying schemas rather than altering\n- Export clear query functions with proper TypeScript typing\n\n## Common Gotchas and Solutions\n\n1. **Environment Limitations:** \n - Val Town runs on Deno in a serverless context, not Node.js\n - Code in `shared/` must work in both frontend and backend environments\n - Cannot use `Deno` keyword in shared code\n - Use `https://esm.sh` for imports that work in both environments\n\n2. **SQLite Peculiarities:**\n - Limited support for ALTER TABLE operations\n - Create new tables with updated schemas and copy data when needed\n - Always run table creation before querying\n\n3. **React Configuration:**\n - All React dependencies must be pinned to 18.2.0\n - Always include `@jsxImportSource https://esm.sh/react@18.2.0` at the top of React files\n - Rendering issues often come from mismatched React versions\n\n4. **File Handling:**\n - Val Town only supports text files, not binary\n - Use the provided utilities to read files across branches and forks\n - For files in the project, use `readFile` helpers\n\n5. **API Design:**\n - `fetch` handler is the entry point for HTTP vals\n - Run the Hono app with `export default app.fetch // This is the entry point for HTTP vals`\n\n",[],[387],{"_110":395,"_102":396,"_169":397,"_171":-5,"_172":154,"_173":398,"_175":176,"_112":399,"_107":33,"_178":192,"_180":400,"_181":22,"_182":-5,"_183":401,"_105":402},"b885de06-39a1-11f1-8e32-42b51c65c3df","PLAN.md","b885deec-39a1-11f1-8e32-42b51c65c3df",21,["D",1776350217257],"# boymath — Val Town Savings Tracker\n\n## Context\nPersonal savings tracker Val on Val Town. Helps track money saved throughout the day by comparing would-have-spent vs. actually-spent, direct amount entry, or quick-tap preset buttons. Records to SQLite; history page shows totals + chart.\n\n---\n\n## Stack\n- **Backend:** Hono on Deno (Val Town serverless)\n- **Frontend:** React 18 + TailwindCSS (via cdn.twind.style)\n- **Storage:** SQLite via `https://esm.town/v/stevekrouse/sqlite`\n- **Charts:** Recharts via `https://esm.sh/recharts@2.8.0?deps=react@18.2.0,react-dom@18.2.0`\n\n---\n\n## File Structure\n\n```\nbackend/\n index.ts ← Hono entry point\n database/\n migrations.ts ← CREATE TABLE\n queries.ts ← insertSaving, getSavings, getDailyChart\n routes/\n savings.ts ← POST /api/savings, GET /api/savings, GET /api/savings/chart\n static.ts ← serve frontend/ files\nfrontend/\n index.html\n index.tsx ← React root, hash router (#/ vs #/history)\n components/\n App.tsx ← top-level router\n MainPage.tsx ← main input page\n HistoryPage.tsx ← history + chart page\n CoinExplosion.tsx ← coin burst animation\nshared/\n types.ts ← SavingsRecord, ChartDataPoint types\n```\n\n---\n\n## Database Schema\n\nTable name: `boymath_savings_1`\n\n```sql\nCREATE TABLE IF NOT EXISTS boymath_savings_1 (\n id INTEGER PRIMARY KEY AUTOINCREMENT,\n amount_cents INTEGER NOT NULL, -- always positive (UI blocks negative submission)\n recorded_at TEXT NOT NULL DEFAULT (datetime('now'))\n)\n```\n\n---\n\n## API Routes\n\n| Method | Path | Description |\n|--------|------|-------------|\n| POST | `/api/savings` | Body: `{ amount_cents: number }`. Insert record. Returns the inserted row. |\n| GET | `/api/savings?period=day\\|week\\|month` | Returns `{ total_cents, records[] }` for the period |\n| GET | `/api/savings/chart` | Returns `{ days: ChartDataPoint[] }` — last 30 days of daily totals + 7-day rolling avg |\n\n---\n\n## Frontend: Main Page\n\n### Visual layout (matching Figma)\n- **Top section:** Input 1 (would-have-spent) and Input 2 (actually-spent), right-aligned, large gray placeholder text. A minus (−) between them. Horizontal divider line beneath.\n- **Amount Saved display:** Large bold \"$0.00\" centered below divider — tappable for direct-input mode.\n- **Submit button:** Large gray circle with \"$\" sign.\n- **Dashed divider**\n- **8 preset buttons** in 2 rows: `$1 $2 $3 $4` / `5¢ 10¢ 20¢ 50¢` — yellow (#FFCF48) circles.\n- **Dashed divider**\n- **History icon** (bar chart icon) bottom-right → navigates to History page.\n\n### Three input modes\nAll modes write to a single `amountCents: number` state. Switching modes resets the previous mode's inputs.\n\n**Mode A — Subtraction (Input 1 & Input 2)**\n- Two `` fields (triggers iOS number pad)\n- User types digits only; displayed as `$X.XX` (e.g. typing \"300\" → shows \"$3.00\")\n- Raw integer treated as cents: 300 → 300 cents → $3.00\n- `amountCents = input1Cents - input2Cents`\n- Activates when user focuses Input 1 or Input 2\n- Resets button accumulator and direct-input state\n\n**Mode B — Direct input**\n- Tap the large Amount Saved display to focus it\n- Same digit-only formatting (300 → $3.00)\n- Activates when user taps the Amount Saved display\n- Resets Input 1/2 and button accumulator\n\n**Mode C — Preset buttons**\n- Each button press adds its value to `amountCents`\n- Pressing $1 ten times → $10.00; buttons do not hold state, they're additive triggers\n- Activates on first button press; resets Input 1/2 and direct-input\n\n### Number formatting logic\n```ts\n// Raw integer treated as cents: 300 → $3.00, 1250 → $12.50\nfunction centsFromDigits(digits: string): number {\n return parseInt(digits.replace(/\\D/g, '') || '0', 10);\n}\nfunction formatCents(cents: number): string {\n const abs = Math.abs(cents);\n const sign = cents < 0 ? '-' : '';\n return `${sign}$${(abs / 100).toFixed(2)}`;\n}\n```\n\n### Negative amount behavior\n- If `amountCents < 0`: full background transitions to red, Submit button disabled + grayed out\n- Amount Saved display still shows the negative value (e.g. \"-$1.50\")\n\n### Amount ready for submission\n\n- If `amountCents > 0`: the Submit button turns #FFBC00.\n\n### Submit behavior\n1. `amountCents > 0`: POST `/api/savings` with `{ amount_cents: amountCents }`\n2. On success: trigger `` animation, then reset all state to $0.00\n\n### Coin explosion animation (CoinExplosion.tsx)\n- On trigger, render ~20 coin elements (🪙 emoji) absolutely positioned at the Submit button's center\n- Each coin animates outward with a unique random angle and distance using CSS `@keyframes`\n- Scale up → scale down + fade out over ~800ms\n- After animation ends, unmount the component\n\n---\n\n## Frontend: History Page\n\n### Layout (same aesthetic as main page)\n- Back button (←) top-left to return to main page\n- **Period selector:** Three pill buttons — `1 Day`, `1 Week`, `1 Month`\n- **Total saved:** Large display (same style as Amount Saved on main page)\n- **Chart:** Recharts `ComposedChart` — bars for daily totals + line overlay for 7-day rolling average\n - X-axis: dates; Y-axis: amount ($)\n - Bars: yellow-tinted; Line: accent yellow (#FFCF48)\n\n### Data fetching\n- On mount and period change: `GET /api/savings?period=...` → updates total display\n- Chart always loads last 30 days: `GET /api/savings/chart`\n\n---\n\n## Backend: Chart Query Logic\n\n`getDailyChart()` in `queries.ts`:\n```sql\nSELECT date(recorded_at) as day, SUM(amount_cents) as total_cents\nFROM boymath_savings_1\nWHERE recorded_at >= date('now', '-30 days')\nGROUP BY date(recorded_at)\nORDER BY day ASC\n```\n7-day rolling average computed in TypeScript after fetching.\n\n---\n\n## Critical Implementation Notes\n\n- **iOS Safari number pad:** `` — numeric keypad on iOS without decimal/negative keys\n- **React pinning:** All React imports use `?deps=react@18.2.0,react-dom@18.2.0`. First line of every `.tsx`: `/** @jsxImportSource https://esm.sh/react@18.2.0 */`\n- **No Hono serveStatic:** Use `readFile`/`serveFile` from `https://esm.town/v/std/utils/index.ts`\n- **Routing:** Hash-based — `window.location.hash === '#/history'` switches view\n- **Hono error unwrapping:** `app.onError((err) => Promise.reject(err))` at top level\n- **Entry point export:** `export default app.fetch`\n\n---\n\n## Verification\n\n1. Open Val URL in iOS Safari → confirm numeric keypad appears for all inputs\n2. Test Mode A: type in Input 1 and Input 2 → Amount Saved shows correct difference\n3. Test Mode B: tap Amount Saved display → type digits → formats correctly\n4. Test Mode C: tap preset buttons multiple times → amount accumulates correctly\n5. Test negative amount: make Input 2 > Input 1 → background turns red, Submit disabled\n6. Test Submit: valid amount → coin explosion fires, everything resets to $0.00, record saved\n7. Open History page → toggle 1 Day / 1 Week / 1 Month → totals update correctly\n8. Verify chart renders with bars + line overlay\n",[],[396],{"_110":404,"_102":106,"_169":405,"_171":-5,"_172":154,"_173":406,"_175":176,"_112":407,"_107":174,"_178":192,"_180":408,"_181":22,"_182":-5,"_183":409,"_105":410},"75097ac0-3a2d-11f1-86c6-42b51c65c3df","8dfd2f02-3a11-11f1-a88b-42b51c65c3df",45,["D",1776410233647],"# boymath\n\nGold:\nhttps://imagedelivery.net/iHX6Ovru0O7AjmyT5yZRoA/f31a21e6-871d-4ce9-c26f-85503ab35400/public\n\nGrey:\nhttps://imagedelivery.net/iHX6Ovru0O7AjmyT5yZRoA/b43d7eaf-156b-425c-da55-9e5302b03700/public\n\nRed:\nhttps://imagedelivery.net/iHX6Ovru0O7AjmyT5yZRoA/14693e71-fcca-46d3-70c2-558383377500/public",[],[106],{"_110":412,"_102":413,"_169":414,"_171":-5,"_172":154,"_173":415,"_175":176,"_112":416,"_107":33,"_178":192,"_180":417,"_181":22,"_182":-5,"_183":418,"_105":419},"b825629c-39a1-11f1-9b89-42b51c65c3df","deno.json","b8256350-39a1-11f1-9b89-42b51c65c3df",13,["D",1776350216700],"{\n \"$schema\": 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