init

CLAUDE.md

@@ -1 +1,81 @@
+# CLAUDE.md
+
+This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
+
 @AGENTS.md
+
+## Commands
+
+```bash
+pnpm dev        # start dev server (Turbopack, port 3000)
+pnpm build      # production build — catches TS and async-params errors
+pnpm lint       # eslint
+```
+
+No test suite exists. Type-check only: `pnpm tsc --noEmit`.
+
+## Architecture
+
+**Knur** is a single-user personal training tracker: running data from Garmin Connect, strength workouts imported from the Strong app, AI analysis via Claude.
+
+Stack: Next.js 16.2.9 · App Router · React 19 · Turbopack · Tailwind v4 · MongoDB · TypeScript.
+
+### Key constraints from Next.js 16
+
+- `params` and `searchParams` in page components are always `Promise<...>` — always `await` them.
+- All pages reading from MongoDB must export `export const dynamic = "force-dynamic"` to prevent static caching.
+- `next/dynamic` with `ssr: false` cannot be called from Server Components — wrap it in a `"use client"` file (see `components/route-map-section.tsx`).
+- `import dynamic from "next/dynamic"` conflicts with the `dynamic` named export — rename the import: `import nextDynamic from "next/dynamic"`.
+
+### Data layer (`lib/`)
+
+`lib/db.ts` — singleton `MongoClient` cached on `global` to survive HMR. Call `getDb()` to get the `Db` instance. Database name defaults to `knur`.
+
+`lib/models/` — each model file exports a Zod schema, TypeScript types derived from it, and MongoDB CRUD helpers. MongoDB collections:
+- `running_activities` — deduplicated on `garminActivityId`; also stores lazy-loaded `routePoints: [lat, lon][]`
+- `strength_workouts` — deduplicated on `sourceKey` (= the Strong share URL or a hash)
+- `ai_analyses` — one doc per analysis; dashboard analysis uses sentinel `targetId = ObjectId("000000000000000000000001")`
+- `garmin_auth` — OAuth1 tokens (`_id: "tokens"`) and pending MFA state (`_id: "pending"`)
+- `sync_state` — singleton `{ _id: "garmin", lastSyncAt: Date }`
+
+`lib/garmin/` — Garmin Connect integration:
+- `sso.ts` — custom SSO login flow (fetches CSRF, posts credentials, handles MFA redirect)
+- `client.ts` — `getAuthorizedClient()` loads saved OAuth1 tokens; `fetchRunningActivities()` fetches up to 50 activities and maps them to `RunningActivityInput`; `fetchActivityRoutePoints()` fetches GPS polyline from the activity details endpoint
+- `wellness.ts` — `fetchRecentWellness(client, days)` fetches sleep/HRV data for N days concurrently via `Promise.allSettled`
+
+`lib/strong/parser.ts` — parses the plain-text "Share workout" output from the Strong iOS app into `StrengthWorkout[]`. Handles multiple workouts in one paste, comma-decimal weights (`12,5 kg`), and optional per-exercise `Notes:` blocks.
+
+`lib/ai/claude.ts` — builds prompts and calls the Anthropic API. Three entry points:
+- `generateAnalysis(targetType, targetId)` — per-workout/run analysis with context from previous sessions
+- `generateDashboardAnalysis()` — holistic analysis combining last 6 runs + 4 workouts + 7 days of Garmin wellness data; Garmin wellness fetch failure is swallowed so analysis works without it
+
+`lib/strength/stats.ts` — pure helpers for computing exercise volume/top-weight history (`getExerciseHistory`).
+
+### App routes (`app/`)
+
+| Route | Purpose |
+|---|---|
+| `/` | Dashboard: weekly stats, latest run/workout, comprehensive AI analysis card |
+| `/running` | Activity list + Garmin sync button |
+| `/running/[id]` | 3-col grid: route map (lazy via Suspense) + highlighted stats |
+| `/strength` | Workout list + volume chart |
+| `/strength/import` | Textarea form to paste Strong share text |
+| `/strength/[id]` | Exercise cards + AI analysis + progress charts |
+| `/settings` | Env config status + Garmin sync |
+| `/ai/actions.ts` | Server actions: `generateAnalysisAction`, `generateDashboardAnalysisAction` |
+
+### Garmin auth flow
+
+Garmin uses OAuth1 with a custom SSO. The first sync triggers a username/password login via `lib/garmin/sso.ts`. If MFA is required, the pending cookie state is stored in MongoDB (`garmin_login_pending`) and the UI prompts for the MFA code. On success, OAuth1 tokens are saved to `garmin_auth` and reused for all subsequent requests via `getAuthorizedClient()`.
+
+### Route map (GPS)
+
+GPS points are fetched lazily on first visit to a run detail page. `RouteMapFetcher` (async Server Component in `app/running/[id]/page.tsx`) checks `activity.routePoints` in DB — if absent and `hasRoute` is true, fetches from Garmin and caches. The map renders via Leaflet (`react-leaflet`) with CartoDB dark tiles (no API key required). Leaflet requires SSR bypass — see `components/route-map-section.tsx` ("use client" wrapper with `next/dynamic ssr: false`).
+
+### Theming
+
+Tailwind v4 with CSS custom properties defined in `app/globals.css`. Key tokens: `bg` (dark navy), `surface` (slightly lighter), `fg` (cream), `accent` (orange `#fb4617`), `muted`, `sand`. Use `var(--color-accent)` etc. when CSS variables are needed outside Tailwind (recharts, Leaflet SVG).
+
+### recharts pitfall
+
+`ResponsiveContainer` with `height="100%"` inside a dynamically-sized wrapper overflows when labels add extra space. Always use a fixed pixel `height` on `ResponsiveContainer` and do NOT set a fixed height on the wrapper div.

app/strength/[id]/page.tsx

@@ -5,7 +5,7 @@ import { InfoTooltip } from "@/components/info-tooltip";
 import { formatDate, formatDateShort } from "@/lib/format";
 import { getLatestAnalysisForTarget } from "@/lib/models/analysis";
 import { getStrengthWorkout, listStrengthWorkouts } from "@/lib/models/strength";
-import { getExerciseHistory } from "@/lib/strength/stats";
+import { exerciseE1rm, getExerciseHistory } from "@/lib/strength/stats";
 
 export const dynamic = "force-dynamic";
 
@@ -43,19 +43,31 @@ export default async function StrengthWorkoutPage({
       <AiAnalysisCard targetType="strength" targetId={workout._id.toString()} analysis={analysis} />
 
       <div className="grid grid-cols-2 gap-2.5 sm:grid-cols-3">
-        {exercisesWithHistory.map(({ exercise }, index) => (
-          <div key={index} className="flex flex-col gap-2 rounded-lg border border-muted/40 bg-surface px-3 py-2.5">
-            <p className="text-xs font-semibold text-fg">{exercise.name}</p>
-            {exercise.notes ? <p className="text-xs text-fg/50 italic">{exercise.notes}</p> : null}
-            <div className="flex flex-wrap gap-1">
-              {exercise.sets.map((set) => (
-                <span key={set.order} className="rounded bg-bg px-1.5 py-0.5 text-xs text-fg/70">
-                  {set.reps ?? "?"}×{set.weightKg !== undefined ? `${set.weightKg} kg` : "—"}
-                </span>
-              ))}
+        {exercisesWithHistory.map(({ exercise }, index) => {
+          const e1rm = exerciseE1rm(exercise);
+          return (
+            <div key={index} className="flex flex-col gap-2 rounded-lg border border-muted/40 bg-surface px-3 py-2.5">
+              <p className="text-xs font-semibold text-fg">{exercise.name}</p>
+              {exercise.notes ? <p className="text-xs text-fg/50 italic">{exercise.notes}</p> : null}
+              <div className="flex flex-wrap gap-1">
+                {exercise.sets.map((set) => {
+                  const pct =
+                    e1rm && set.weightKg != null
+                      ? Math.round((set.weightKg / e1rm) * 100)
+                      : null;
+                  return (
+                    <span key={set.order} className="rounded bg-bg px-1.5 py-0.5 text-xs text-fg/70">
+                      {set.reps ?? "?"}×{set.weightKg !== undefined ? `${set.weightKg} kg` : "—"}
+                      {pct !== null ? (
+                        <span className="ml-1 text-fg/40">{pct}%</span>
+                      ) : null}
+                    </span>
+                  );
+                })}
+              </div>
             </div>
-          </div>
-        ))}
+          );
+        })}
       </div>
 
       {exercisesWithHistory.some(({ history }) => history.length >= 2) ? (
@@ -75,6 +87,7 @@ export default async function StrengthWorkoutPage({
                     label: formatDateShort(point.date),
                     volumeKg: point.volumeKg,
                     topWeightKg: point.topWeightKg,
+                    e1rmKg: point.e1rmKg,
                   }))}
                 />
               ))}

components/exercise-progress-chart.tsx

@@ -4,9 +4,27 @@ import { CartesianGrid, Line, LineChart, ResponsiveContainer, Tooltip, XAxis, YA
 
 type ExerciseProgressChartProps = {
   name: string;
-  data: { label: string; volumeKg: number; topWeightKg?: number }[];
+  data: { label: string; volumeKg: number; topWeightKg?: number; e1rmKg?: number }[];
 };
 
+function E1rmDelta({ data }: { data: ExerciseProgressChartProps["data"] }) {
+  const points = data.filter((d) => d.e1rmKg != null).slice(-5);
+  if (points.length < 2) return null;
+
+  const first = points[0].e1rmKg!;
+  const last = points[points.length - 1].e1rmKg!;
+  const diffKg = Math.round((last - first) * 10) / 10;
+  const diffPct = Math.round(((last - first) / first) * 100);
+  const sign = diffKg >= 0 ? "+" : "";
+  const color = diffKg > 0 ? "text-emerald-400" : diffKg < 0 ? "text-rose-400" : "text-fg/40";
+
+  return (
+    <span className={`text-xs font-medium tabular-nums ${color}`}>
+      E1RM {sign}{diffKg} kg ({sign}{diffPct}%)
+    </span>
+  );
+}
+
 export function ExerciseProgressChart({ name, data }: ExerciseProgressChartProps) {
   if (data.length < 2) {
     return null;
@@ -14,7 +32,10 @@ export function ExerciseProgressChart({ name, data }: ExerciseProgressChartProps
 
   return (
     <div className="w-full rounded-lg border border-muted/40 bg-surface p-4">
-      <div className="mb-2 text-sm text-fg/60">{name}</div>
+      <div className="mb-2 flex items-baseline justify-between gap-2">
+        <span className="text-sm text-fg/60">{name}</span>
+        <E1rmDelta data={data} />
+      </div>
       <ResponsiveContainer width="100%" height={150}>
         <LineChart data={data} margin={{ top: 8, right: 8, left: 0, bottom: 0 }}>
           <CartesianGrid stroke="var(--color-muted)" opacity={0.3} vertical={false} />
@@ -36,10 +57,12 @@ export function ExerciseProgressChart({ name, data }: ExerciseProgressChartProps
               fontSize: 12,
               color: "var(--color-fg)",
             }}
-            formatter={(value, key) => [
-              key === "topWeightKg" ? `${value} kg` : `${Math.round(Number(value)).toLocaleString("pl-PL")} kg`,
-              key === "topWeightKg" ? "Maks. ciężar" : "Wolumen",
-            ]}
+            formatter={(value, key) => {
+              if (key === "volumeKg") return [`${Math.round(Number(value)).toLocaleString("pl-PL")} kg`, "Wolumen"];
+              if (key === "topWeightKg") return [`${value} kg`, "Maks. ciężar"];
+              if (key === "e1rmKg") return [`${value} kg`, "E1RM (Epley)"];
+              return [`${value}`, String(key)];
+            }}
           />
           <Line
             yAxisId="volume"
@@ -57,6 +80,15 @@ export function ExerciseProgressChart({ name, data }: ExerciseProgressChartProps
             strokeWidth={2}
             dot={{ r: 3 }}
           />
+          <Line
+            yAxisId="weight"
+            type="monotone"
+            dataKey="e1rmKg"
+            stroke="#60a5fa"
+            strokeWidth={2}
+            strokeDasharray="4 2"
+            dot={{ r: 3 }}
+          />
         </LineChart>
       </ResponsiveContainer>
     </div>

lib/strength/stats.ts

@@ -1,5 +1,6 @@
 import type { StrengthExercise, StrengthWorkout } from "@/lib/models/strength";
 
+
 export function exerciseVolumeKg(exercise: StrengthExercise): number {
   return exercise.sets.reduce((sum, set) => sum + (set.weightKg ?? 0) * (set.reps ?? 0), 0);
 }
@@ -11,6 +12,17 @@ export function exerciseTopWeightKg(exercise: StrengthExercise): number | undefi
   return weights.length > 0 ? Math.max(...weights) : undefined;
 }
 
+// Epley formula: weight × (1 + reps / 30). Returns best e1rm across all sets.
+export function exerciseE1rm(exercise: StrengthExercise): number | undefined {
+  let best: number | undefined;
+  for (const set of exercise.sets) {
+    if (set.weightKg == null || set.reps == null || set.reps < 1) continue;
+    const e1rm = set.weightKg * (1 + set.reps / 30);
+    if (best === undefined || e1rm > best) best = e1rm;
+  }
+  return best !== undefined ? Math.round(best * 10) / 10 : undefined;
+}
+
 export function workoutVolumeKg(workout: StrengthWorkout): number {
   return workout.exercises.reduce((sum, exercise) => sum + exerciseVolumeKg(exercise), 0);
 }
@@ -19,6 +31,7 @@ export type ExerciseHistoryPoint = {
   date: Date;
   volumeKg: number;
   topWeightKg?: number;
+  e1rmKg?: number;
 };
 
 /**
@@ -38,6 +51,7 @@ export function getExerciseHistory(
       date: workout.date,
       volumeKg: exerciseVolumeKg(exercise),
       topWeightKg: exerciseTopWeightKg(exercise),
+      e1rmKg: exerciseE1rm(exercise),
     });
   }