Repository: jayvicsanantonio/tracknstick.com
Pull request #77: Use timezone for History and Streaks
Author: login: jayvicsanantonio
Created: 2025-05-17T07:08:51Z | Merged: 2025-05-17T07:21:53Z



<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit

- **New Features**
	- Progress history and streaks are now accurately displayed based on your local timezone.
- **Improvements**
	- Progress completion percentages are now rounded for clearer visual representation.
- **Bug Fixes**
	- Ensured progress data reflects correct dates and streaks according to your timezone.
- **Refactor**
	- Enhanced internal logic to better handle timezone-aware date calculations.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->


Diff:
diff --git a/src/features/progress/api/index.ts b/src/features/progress/api/index.ts
index 7a04dd1..5f81706 100644
--- a/src/features/progress/api/index.ts
+++ b/src/features/progress/api/index.ts
@@ -18,12 +18,19 @@ export interface ProgressOverviewResponse {
 
 /**
  * Fetches user's progress history showing completion rates by day
+ * Includes user's timezone to ensure dates are calculated correctly
  */
 export const fetchProgressHistory = async (
-  startDate?: string,
-  endDate?: string,
+  timezone: string,
+  startDate?: Date | null,
+  endDate?: Date | null,
 ): Promise<HistoryDates[]> => {
-  const params: Record<string, string> = {};
+  const params: {
+    startDate?: Date;
+    endDate?: Date;
+    timezone?: string;
+  } = { timezone };
+
   if (startDate) params.startDate = startDate;
   if (endDate) params.endDate = endDate;
 
@@ -32,9 +39,7 @@ export const fetchProgressHistory = async (
       "/api/v1/progress/history",
       { params },
     );
-    console.log("API Response (fetchProgressHistory):", response.data);
 
-    // Check if response.data contains a 'history' property
     if (response.data?.history) {
       return response.data.history;
     } else {
@@ -49,23 +54,34 @@ export const fetchProgressHistory = async (
 
 /**
  * Fetches user's current and longest streaks
+ * Includes user's timezone for accurate day boundary calculations
  */
-export const fetchProgressStreaks =
-  async (): Promise<ProgressStreaksResponse> => {
-    const response = await axiosInstance.get<ProgressStreaksResponse>(
-      "/api/v1/progress/streaks",
-    );
-    return response.data;
-  };
+export const fetchProgressStreaks = async (
+  timezone: string,
+): Promise<ProgressStreaksResponse> => {
+  const params: Record<string, string> = { timezone };
+
+  const response = await axiosInstance.get<ProgressStreaksResponse>(
+    "/api/v1/progress/streaks",
+    { params },
+  );
+  return response.data;
+};
 
 /**
  * Fetches comprehensive progress data including history and streaks
+ * Includes user's timezone for consistent date calculations
  */
 export const fetchProgressOverview = async (
-  startDate?: string,
-  endDate?: string,
+  timezone: string,
+  startDate?: Date,
+  endDate?: Date,
 ): Promise<ProgressOverviewResponse> => {
-  const params: Record<string, string> = {};
+  const params: {
+    startDate?: Date;
+    endDate?: Date;
+    timezone?: string;
+  } = { timezone };
   if (startDate) params.startDate = startDate;
   if (endDate) params.endDate = endDate;
 
diff --git a/src/features/progress/components/CalendarDayCircle.tsx b/src/features/progress/components/CalendarDayCircle.tsx
index de5b77e..30ad2f8 100644
--- a/src/features/progress/components/CalendarDayCircle.tsx
+++ b/src/features/progress/components/CalendarDayCircle.tsx
@@ -10,7 +10,7 @@ export default function CalendarDayCircle({
   isToday: boolean;
 }) {
   const showCircle = isPast || isToday;
-  const percent = dayData ? dayData.completionRate : 0;
+  const percent = dayData ? Math.round(dayData.completionRate) : 0;
 
   return (
     <div className="relative w-1/2 h-1/2">
diff --git a/src/features/progress/hooks/useProgressHistory.ts b/src/features/progress/hooks/useProgressHistory.ts
index 3f4fa85..c59afbe 100644
--- a/src/features/progress/hooks/useProgressHistory.ts
+++ b/src/features/progress/hooks/useProgressHistory.ts
@@ -1,38 +1,59 @@
 import useSWR, { SWRResponse } from "swr";
 import { fetchProgressHistory } from "@/features/progress/api";
-import { useState, useEffect } from "react";
-import { formatISO } from "date-fns";
+import { useState, useEffect, useContext } from "react";
 import { HistoryDates } from "@/features/progress/types/HistoryDates";
+import { getLocalStartofDayUTC, getLocalEndOfDayUTC } from "@/lib/formatDate";
+import { DateContext } from "@/context/DateContext";
 
-export default function useProgressHistory(selectedMonth?: Date) {
-  const [monthStartDate, setMonthStartDate] = useState<string>("");
-  const [monthEndDate, setMonthEndDate] = useState<string>("");
+const getMonthBoundaryDates = (date: Date, timeZone: string) => {
+  const year = date.getFullYear();
+  const month = date.getMonth();
 
-  useEffect(() => {
-    if (selectedMonth) {
-      const year = selectedMonth.getFullYear();
-      const month = selectedMonth.getMonth();
+  const firstDay = new Date(year, month, 1);
+  const lastDay = new Date(year, month + 1, 0);
 
-      const firstDay = new Date(year, month, 1);
-      const lastDay = new Date(year, month + 1, 0);
+  return {
+    startDate: getLocalStartofDayUTC(firstDay, timeZone),
+    endDate: getLocalEndOfDayUTC(lastDay, timeZone),
+  };
+};
 
-      setMonthStartDate(formatISO(firstDay, { representation: "date" }));
-      setMonthEndDate(formatISO(lastDay, { representation: "date" }));
-    } else {
-      setMonthStartDate("");
-      setMonthEndDate("");
-    }
-  }, [selectedMonth]);
+export default function useProgressHistory(selectedMonth: Date) {
+  const { date, timeZone } = useContext(DateContext);
+  const [monthStartDate, setMonthStartDate] = useState<Date>(() => {
+    const { startDate } = getMonthBoundaryDates(selectedMonth, timeZone);
+    return startDate;
+  });
+  const [monthEndDate, setMonthEndDate] = useState<Date>(() => {
+    const { endDate } = getMonthBoundaryDates(selectedMonth, timeZone);
+    return endDate;
+  });
+
+  useEffect(() => {
+    const { startDate, endDate } = getMonthBoundaryDates(
+      selectedMonth,
+      timeZone,
+    );
+    setMonthStartDate(startDate);
+    setMonthEndDate(endDate);
+  }, [selectedMonth, timeZone]);
 
   const cacheKey =
     monthStartDate && monthEndDate
-      ? (["progressHistory", monthStartDate, monthEndDate] as const)
-      : (["progressHistory"] as const);
+      ? ([
+          "progressHistory",
+          date.toISOString(),
+          monthStartDate,
+          monthEndDate,
+        ] as const)
+      : (["progressHistory", date.toISOString()] as const);
 
   const { data, error, isLoading }: SWRResponse<HistoryDates[], Error> = useSWR<
     HistoryDates[],
     Error
-  >(cacheKey, () => fetchProgressHistory(monthStartDate, monthEndDate));
+  >(cacheKey, () =>
+    fetchProgressHistory(timeZone, monthStartDate, monthEndDate),
+  );
 
   return {
     historyData: data ?? [],
diff --git a/src/features/progress/hooks/useProgressStreaks.ts b/src/features/progress/hooks/useProgressStreaks.ts
index 784b7a0..ed33046 100644
--- a/src/features/progress/hooks/useProgressStreaks.ts
+++ b/src/features/progress/hooks/useProgressStreaks.ts
@@ -3,8 +3,11 @@ import {
   fetchProgressStreaks,
   ProgressStreaksResponse,
 } from "@/features/progress/api";
+import { useContext } from "react";
+import { DateContext } from "@/context/DateContext";
 
 export default function useProgressStreaks() {
+  const { timeZone } = useContext(DateContext);
   const {
     data,
     error,
@@ -12,7 +15,9 @@ export default function useProgressStreaks() {
   }: SWRResponse<ProgressStreaksResponse, Error> = useSWR<
     ProgressStreaksResponse,
     Error
-  >("progressStreaks", fetchProgressStreaks);
+  >(["progressStreaks", timeZone] as const, () =>
+    fetchProgressStreaks(timeZone),
+  );
 
   return {
     currentStreak: data?.currentStreak ?? 0,


Reviews:
user: login: gemini-code-assist[bot]
body: Hello @jayvicsanantonio, I'm Gemini Code Assist[^1]! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

## Summary of Changes
Hello team, gemini-code-assist here to provide a summary of this pull request by @jayvicsanantonio. The primary goal of this PR, as indicated by the title, is to enhance the accuracy of the progress history and streak calculations by incorporating the user's timezone. This is crucial because day boundaries, which are fundamental to streaks and daily history, vary significantly across different timezones. The changes involve modifying the API calls to accept a timezone parameter and updating the frontend hooks to fetch and pass the user's timezone obtained from the `DateContext`.

### Highlights
* **Timezone Integration in API**: The API functions responsible for fetching progress history (`fetchProgressHistory`), streaks (`fetchProgressStreaks`), and the overall progress overview (`fetchProgressOverview`) have been updated to accept a `timezone` string parameter. This parameter is now included in the request payload sent to the backend endpoints (`/api/v1/progress/history` and `/api/v1/progress/streaks`). This allows the backend to perform date calculations based on the user's local time.
* **Frontend Hooks Updated**: The `useProgressHistory` and `useProgressStreaks` hooks now utilize the `DateContext` to retrieve the user's current `timeZone`. This timezone information is then passed to the respective API fetching functions (`fetchProgressHistory` and `fetchProgressStreaks`).
* **Timezone-Aware Date Calculations**: In `useProgressHistory`, helper functions (`getLocalStartofDayUTC`, `getLocalEndOfDayUTC`) are introduced and used to calculate the start and end dates for the selected month based on the user's timezone. These calculated `Date` objects are then passed to the `fetchProgressHistory` API call, replacing the previous string-based date parameters.
* **SWR Cache Key Update**: The SWR cache key in `useProgressHistory` has been updated to include the current date (from `DateContext`) and the calculated start/end dates. This ensures that the cache is correctly invalidated when the date or the selected month/timezone changes.
* **Minor UI Adjustment**: A small change was made in `CalendarDayCircle.tsx` to round the `completionRate` percentage before it's used, likely for display purposes.

### Changelog
<details>
<summary>Click here to see the changelog</summary>

* **src/features/progress/api/index.ts**
  * Added `timezone` parameter to `fetchProgressHistory` (line 24), `fetchProgressStreaks` (line 60), and `fetchProgressOverview` (line 76).
  * Updated `startDate` and `endDate` parameters in `fetchProgressHistory` (line 25, 26) and `fetchProgressOverview` (line 77, 78) to accept `Date | null` or `Date` instead of `string`.
  * Modified the `params` object structure in `fetchProgressHistory` (line 28-32) and `fetchProgressOverview` (line 80-84) to correctly include the `timezone` and `Date` objects.
  * Added the `timezone` parameter to the `params` object in `fetchProgressStreaks` (line 62).
  * Passed the `params` object to the `axiosInstance.get` call for `fetchProgressStreaks` (line 66).
  * Removed a `console.log` statement in `fetchProgressHistory` (removed line 35).
* **src/features/progress/components/CalendarDayCircle.tsx**
  * Wrapped `dayData.completionRate` with `Math.round()` (line 13).
* **src/features/progress/hooks/useProgressHistory.ts**
  * Imported `useContext`, `getLocalStartofDayUTC`, `getLocalEndOfDayUTC`, and `DateContext` (lines 3, 5, 6).
  * Removed `formatISO` import (removed line 4).
  * Modified the hook signature to require `selectedMonth: Date` (line 21).
  * Added `getMonthBoundaryDates` helper function (lines 8-18).
  * Used `useContext(DateContext)` to get `date` and `timeZone` (line 22).
  * Initialized `monthStartDate` and `monthEndDate` state using `getMonthBoundaryDates` and context `timeZone` (lines 23-36).
  * Updated `useEffect` dependency array to include `timeZone` (line 45).
  * Updated `useEffect` logic to use `getMonthBoundaryDates` and context `timeZone` (lines 39-44).
  * Modified SWR `cacheKey` to include `date.toISOString()` and the `Date` objects for start/end dates (lines 47-55).
  * Updated the call to `fetchProgressHistory` to pass `timeZone`, `monthStartDate`, and `monthEndDate` (line 61).
* **src/features/progress/hooks/useProgressStreaks.ts**
  * Imported `useContext` and `DateContext` (lines 6, 7).
  * Used `useContext(DateContext)` to get `timeZone` (line 10).
  * Updated the call to `fetchProgressStreaks` in `useSWR` to pass `timeZone` (line 18).

</details>


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---

> Timezones shift the day,
> Streaks need borders clear and true,
> Code aligns the clock.


state: COMMENTED
author_association: NONE
submitted_at: 2025-05-17T07:09:18Z
user: login: gemini-code-assist[bot]
body: ## Code Review
This pull request introduces timezone awareness for fetching progress history and streaks, which is a significant improvement for accurate user data representation. The changes involve updating API function signatures and corresponding hooks to utilize a `timezone` parameter, primarily sourced from `DateContext`.

Overall, the approach is sound, and the code modifications are generally well-implemented. I've identified a few areas that could be refined for robustness and performance, particularly concerning cache keys in SWR hooks and defensive coding patterns.

### Summary of Findings
* **Cache Key for Streaks**: The SWR cache key in `useProgressStreaks` does not include `timeZone`, which could lead to stale data if the timezone changes. Severity: High.
* **Redundant Fallback for `selectedMonth`**: In `useProgressHistory`, `selectedMonth || new Date()` is used despite `selectedMonth` being typed as non-nullable `Date`. This could mask issues or be dead code. Severity: Medium.
* **Cache Key Dependency in `useProgressHistory`**: The inclusion of `DateContext.date.toISOString()` in `useProgressHistory`'s SWR cache key might lead to unnecessary refetches if `DateContext.date` changes independently of the `selectedMonth`. Severity: Medium.
* **UI Improvement (Not Commented)**: In `src/features/progress/components/CalendarDayCircle.tsx`, `completionRate` is now rounded using `Math.round()`. This is a minor UI improvement. Severity: Low (not commented due to review settings).

### Merge Readiness
The pull request makes good progress in adding timezone support. However, there's a high-severity issue with the SWR cache key in `useProgressStreaks` that should be addressed before merging to prevent incorrect data display. Additionally, a few medium-severity points regarding cache keys and defensive coding in `useProgressHistory` would benefit from clarification or refinement.

I recommend addressing the high-severity issue and considering the medium-severity suggestions. As a reviewer, I am not authorized to approve the pull request, but addressing these points will improve the robustness and performance of the changes.
state: CHANGES_REQUESTED
author_association: NONE
submitted_at: 2025-05-17T07:11:01Z
user: login: coderabbitai[bot]
body: **Actionable comments posted: 2**

<details>
<summary>🔭 Outside diff range comments (1)</summary><blockquote>

<details>
<summary>src/features/progress/api/index.ts (1)</summary><blockquote>

`19-93`: _💡 Verification agent_

<details>
<summary>🧩 Analysis chain</summary>

**Verify Date object serialization in API requests.**

Ensure that the axiosInstance correctly serializes Date objects in the params object. If the API expects a specific date format, you may need to manually format the dates before sending them.

---

🏁 Script executed:

```shell
#!/bin/bash
# Check how axios serializes Date objects in requests and if there's any custom serialization applied

# Look for axios config or serialization logic in the codebase
echo "Checking for axios configuration:"
rg -A 10 "axiosInstance" --type ts

# Check if there's any date serialization or formatting in the codebase
echo "Checking for date serialization/formatting logic:"
rg -A 5 "new Date|format.*date|toISOString" --type ts
```

Length of output: 22813

---



</details>

**Explicitly format Date params as ISO strings**

Ensure `startDate` and `endDate` are serialized to ISO format in your progress API calls for consistency with other endpoints and to guarantee the API receives the expected format.

In `src/features/progress/api/index.ts`:

- fetchProgressHistory  
  • Change  
    ```ts
    if (startDate) params.startDate = startDate;
    if (endDate)   params.endDate   = endDate;
    ```  
    to  
    ```ts
    if (startDate) params.startDate = startDate.toISOString();
    if (endDate)   params.endDate   = endDate.toISOString();
    ```

- fetchProgressOverview  
  • Apply the same `toISOString()` conversion for `startDate` and `endDate`

</blockquote></details>

</blockquote></details>

<details>
<summary>🧹 Nitpick comments (6)</summary><blockquote>

<details>
<summary>src/features/progress/components/CalendarDayCircle.tsx (1)</summary><blockquote>

`13-14`: **Clamp percentage to avoid invalid SVG offsets**

`Math.round` is fine for display, but if the backend ever returns a value slightly outside 0-100 (e.g. `-0.2`, `100.4`) the circle math goes negative/overflow and the SVG renders incorrectly.

```diff
-const percent = dayData ? Math.round(dayData.completionRate) : 0;
+const percent = dayData
+  ? Math.min(100, Math.max(0, Math.round(dayData.completionRate)))
+  : 0;
```

This one-liner keeps the component safe without altering its public API.

</blockquote></details>
<details>
<summary>src/features/progress/hooks/useProgressHistory.ts (2)</summary><blockquote>

`38-45`: **Derive month boundaries with `useMemo` instead of state + effect**

`monthStartDate` and `monthEndDate` are pure derivatives of `selectedMonth` and `timeZone`.  
Using state/effect introduces an extra render and potential staleness:

```diff
-const [monthStartDate, setMonthStartDate] = useState<Date>(() => ... );
-const [monthEndDate, setMonthEndDate] = useState<Date>(() => ... );
-
-useEffect(() => {
-  const { startDate, endDate } = getMonthBoundaryDates(...);
-  setMonthStartDate(startDate);
-  setMonthEndDate(endDate);
-}, [selectedMonth, timeZone]);
+const { startDate: monthStartDate, endDate: monthEndDate } = useMemo(
+  () => getMonthBoundaryDates(selectedMonth ?? new Date(), timeZone),
+  [selectedMonth, timeZone],
+);
```

This keeps the hook purely functional and avoids unnecessary updates.

---

`8-19`: **Extract helper to a shared util**

`getMonthBoundaryDates` is a pure function independent of React.  
Moving it to something like `src/lib/dateUtils.ts` makes it reusable and easier to unit-test.

</blockquote></details>
<details>
<summary>src/features/progress/api/index.ts (3)</summary><blockquote>

`59-69`: **Consider adding error handling to fetchProgressStreaks.**

While the timezone parameter addition is good, this function lacks error handling unlike `fetchProgressHistory`. Consider adding try/catch to handle potential API failures.


```diff
export const fetchProgressStreaks = async (
  timezone: string,
): Promise<ProgressStreaksResponse> => {
  const params: Record<string, string> = { timezone };

-  const response = await axiosInstance.get<ProgressStreaksResponse>(
-    "/api/v1/progress/streaks",
-    { params },
-  );
-  return response.data;
+  try {
+    const response = await axiosInstance.get<ProgressStreaksResponse>(
+      "/api/v1/progress/streaks",
+      { params },
+    );
+    return response.data;
+  } catch (error) {
+    console.error("Error fetching progress streaks:", error);
+    return { currentStreak: 0, longestStreak: 0 };
+  }
};
```

---

`62-62`: **Consider using a consistent type pattern across all functions.**

The params object uses `Record<string, string>` while the other functions use explicit type definitions. For consistency, consider using an explicit type definition here as well.


```diff
- const params: Record<string, string> = { timezone };
+ const params: {
+   timezone: string;
+ } = { timezone };
```

---

`80-86`: **Consider adding error handling to fetchProgressOverview.**

Similar to `fetchProgressStreaks`, this function would benefit from error handling to prevent unhandled exceptions.


```diff
export const fetchProgressOverview = async (
  timezone: string,
  startDate?: Date,
  endDate?: Date,
): Promise<ProgressOverviewResponse> => {
  const params: {
    startDate?: Date;
    endDate?: Date;
    timezone?: string;
  } = { timezone };
  if (startDate) params.startDate = startDate;
  if (endDate) params.endDate = endDate;

-  const response = await axiosInstance.get<ProgressOverviewResponse>(
-    "/api/v1/progress/overview",
-    { params },
-  );
-  return response.data;
+  try {
+    const response = await axiosInstance.get<ProgressOverviewResponse>(
+      "/api/v1/progress/overview",
+      { params },
+    );
+    return response.data;
+  } catch (error) {
+    console.error("Error fetching progress overview:", error);
+    return { 
+      history: [], 
+      currentStreak: 0, 
+      longestStreak: 0 
+    };
+  }
};
```

</blockquote></details>

</blockquote></details>

<details>
<summary>📜 Review details</summary>

**Configuration used: CodeRabbit UI**
**Review profile: CHILL**
**Plan: Pro**
**Cache: Disabled due to data retention organization setting**
**Knowledge Base: Disabled due to data retention organization setting**


<details>
<summary>📥 Commits</summary>

Reviewing files that changed from the base of the PR and between dd27436e55417c26e3f2162f622c5dbe5142e8c7 and 83a7fc49678892bd4999ae6d334747f29088e7c5.

</details>

<details>
<summary>📒 Files selected for processing (4)</summary>

* `src/features/progress/api/index.ts` (2 hunks)
* `src/features/progress/components/CalendarDayCircle.tsx` (1 hunks)
* `src/features/progress/hooks/useProgressHistory.ts` (1 hunks)
* `src/features/progress/hooks/useProgressStreaks.ts` (1 hunks)

</details>

<details>
<summary>🧰 Additional context used</summary>

<details>
<summary>🧬 Code Graph Analysis (3)</summary>

<details>
<summary>src/features/progress/hooks/useProgressStreaks.ts (2)</summary><blockquote>

<details>
<summary>src/context/DateContext.tsx (1)</summary>

* `DateContext` (14-26)

</details>
<details>
<summary>src/features/progress/api/index.ts (2)</summary>

* `ProgressStreaksResponse` (8-11)
* `fetchProgressStreaks` (59-69)

</details>

</blockquote></details>
<details>
<summary>src/features/progress/hooks/useProgressHistory.ts (4)</summary><blockquote>

<details>
<summary>src/lib/formatDate.ts (2)</summary>

* `getLocalStartofDayUTC` (1-24)
* `getLocalEndOfDayUTC` (26-52)

</details>
<details>
<summary>src/context/DateContext.tsx (1)</summary>

* `DateContext` (14-26)

</details>
<details>
<summary>src/features/progress/types/HistoryDates.ts (1)</summary>

* `HistoryDates` (1-4)

</details>
<details>
<summary>src/features/progress/api/index.ts (1)</summary>

* `fetchProgressHistory` (23-53)

</details>

</blockquote></details>
<details>
<summary>src/features/progress/api/index.ts (1)</summary><blockquote>

<details>
<summary>src/features/progress/types/HistoryDates.ts (1)</summary>

* `HistoryDates` (1-4)

</details>

</blockquote></details>

</details>

</details>

<details>
<summary>⏰ Context from checks skipped due to timeout of 90000ms (1)</summary>

* GitHub Check: Cloudflare Pages

</details>

<details>
<summary>🔇 Additional comments (6)</summary><blockquote>

<details>
<summary>src/features/progress/api/index.ts (6)</summary>

`19-22`: **Documentation update to reflect timezone usage is appropriate.**

The addition of timezone information in the JSDoc comment clearly explains why the timezone parameter was added, improving code maintainability.

---

`23-27`: **Parameter types improved for timezone awareness.**

Good changes to the function signature:
1. Adding the required `timezone` parameter
2. Converting `startDate` and `endDate` from strings to `Date` objects with optional nullability

This provides better type safety and aligns with the timezone-aware design.

---

`28-32`: **Type definition for params object is appropriate.**

The explicit type definition for the params object is clear and properly includes the timezone parameter. This ensures type safety when passing the parameters to the API.

---

`55-58`: **Documentation update for streaks function is clear.**

The added comment appropriately explains that timezone is needed for "accurate day boundary calculations" which is especially important for streak tracking.

---

`71-74`: **Documentation update for overview function is appropriate.**

The JSDoc comment clearly explains the purpose of adding timezone for consistency in date calculations.

---

`75-84`: **Parameters and types for fetchProgressOverview are well-defined.**

Good improvements:
1. Adding the required `timezone` parameter
2. Converting date parameters from strings to `Date` objects
3. Creating an explicit type for the params object

This maintains consistency with the other functions and ensures type safety.

</details>

</blockquote></details>

</details>

<!-- This is an auto-generated comment by CodeRabbit for review status -->
state: COMMENTED
author_association: NONE
submitted_at: 2025-05-17T07:12:50Z
user: login: coderabbitai[bot]
body: **Actionable comments posted: 0**

<details>
<summary>🧹 Nitpick comments (2)</summary><blockquote>

<details>
<summary>src/features/progress/hooks/useProgressHistory.ts (2)</summary><blockquote>

`8-19`: **Well-implemented timezone-aware date boundary calculation**

The `getMonthBoundaryDates` function correctly calculates the first and last day of a month with timezone awareness using the appropriate utility functions. This is a key improvement for handling timezone-specific date ranges.


If this function could be useful in other parts of the application, consider moving it to a date utility file for reusability.

---

`21-30`: **Good removal of the fallback pattern mentioned in previous reviews**

The hook signature now correctly requires a mandatory `selectedMonth` parameter without fallbacks, addressing the previous review comments. The implementation properly initializes state using timezone-aware date calculations.


Consider simplifying the state initialization to reduce code duplication:

```diff
-  const [monthStartDate, setMonthStartDate] = useState<Date>(() => {
-    const { startDate } = getMonthBoundaryDates(selectedMonth, timeZone);
-    return startDate;
-  });
-  const [monthEndDate, setMonthEndDate] = useState<Date>(() => {
-    const { endDate } = getMonthBoundaryDates(selectedMonth, timeZone);
-    return endDate;
-  });
+  const initialBoundaries = getMonthBoundaryDates(selectedMonth, timeZone);
+  const [monthStartDate, setMonthStartDate] = useState<Date>(initialBoundaries.startDate);
+  const [monthEndDate, setMonthEndDate] = useState<Date>(initialBoundaries.endDate);
```

</blockquote></details>

</blockquote></details>

<details>
<summary>📜 Review details</summary>

**Configuration used: CodeRabbit UI**
**Review profile: CHILL**
**Plan: Pro**
**Cache: Disabled due to data retention organization setting**
**Knowledge Base: Disabled due to data retention organization setting**


<details>
<summary>📥 Commits</summary>

Reviewing files that changed from the base of the PR and between 83a7fc49678892bd4999ae6d334747f29088e7c5 and 8a095c1d9908bf66fc5d9d56e15589771334f277.

</details>

<details>
<summary>📒 Files selected for processing (2)</summary>

* `src/features/progress/hooks/useProgressHistory.ts` (1 hunks)
* `src/features/progress/hooks/useProgressStreaks.ts` (1 hunks)

</details>

<details>
<summary>🚧 Files skipped from review as they are similar to previous changes (1)</summary>

* src/features/progress/hooks/useProgressStreaks.ts

</details>

<details>
<summary>🧰 Additional context used</summary>

<details>
<summary>🧬 Code Graph Analysis (1)</summary>

<details>
<summary>src/features/progress/hooks/useProgressHistory.ts (4)</summary><blockquote>

<details>
<summary>src/lib/formatDate.ts (2)</summary>

* `getLocalStartofDayUTC` (1-24)
* `getLocalEndOfDayUTC` (26-52)

</details>
<details>
<summary>src/context/DateContext.tsx (1)</summary>

* `DateContext` (14-26)

</details>
<details>
<summary>src/features/progress/types/HistoryDates.ts (1)</summary>

* `HistoryDates` (1-4)

</details>
<details>
<summary>src/features/progress/api/index.ts (1)</summary>

* `fetchProgressHistory` (23-53)

</details>

</blockquote></details>

</details>

</details>

<details>
<summary>⏰ Context from checks skipped due to timeout of 90000ms (1)</summary>

* GitHub Check: Cloudflare Pages

</details>

<details>
<summary>🔇 Additional comments (3)</summary><blockquote>

<details>
<summary>src/features/progress/hooks/useProgressHistory.ts (3)</summary>

`32-39`: **Effective dependency handling for date boundaries**

The effect correctly updates the date boundaries when either `selectedMonth` or `timeZone` changes, ensuring the component stays synchronized with these critical parameters.

---

`41-49`: **Consider impact of date in cache key on refetching behavior**

Including `date.toISOString()` from DateContext in the cache key might cause unnecessary refetching when the current date changes but the selected month view remains the same.


Is the inclusion of the current date in the cache key intentional for specific re-validation scenarios? If not, you might consider removing it to avoid potential over-fetching:

```diff
  const cacheKey =
    monthStartDate && monthEndDate
      ? ([
          "progressHistory",
-         date.toISOString(),
          monthStartDate,
          monthEndDate,
+         timeZone
        ] as const)
-      : (["progressHistory", date.toISOString()] as const);
+      : (["progressHistory", timeZone] as const);
```

Additionally, the conditional check here seems unnecessary since both `monthStartDate` and `monthEndDate` are always set in the state initialization and effect.

---

`54-56`: **Proper implementation of timezone-aware data fetching**

The SWR fetcher function now correctly passes the timezone and Date objects to `fetchProgressHistory`, ensuring consistent timezone-aware API requests. This aligns with the API changes and ensures proper data fetching with timezone context.

</details>

</blockquote></details>

</details>

<!-- This is an auto-generated comment by CodeRabbit for review status -->
state: COMMENTED
author_association: NONE
submitted_at: 2025-05-17T07:21:44Z

Review comments:
diff_hunk: @@ -3,16 +3,19 @@ import {
   fetchProgressStreaks,
   ProgressStreaksResponse,
 } from "@/features/progress/api";
+import { useContext } from "react";
+import { DateContext } from "@/context/DateContext";
 
 export default function useProgressStreaks() {
+  const { timeZone } = useContext(DateContext);
   const {
     data,
     error,
     isLoading,
   }: SWRResponse<ProgressStreaksResponse, Error> = useSWR<
     ProgressStreaksResponse,
     Error
-  >("progressStreaks", fetchProgressStreaks);
+  >("progressStreaks", () => fetchProgressStreaks(timeZone));
path: src/features/progress/hooks/useProgressStreaks.ts
user: login: gemini-code-assist[bot]
body: ![high](https://img.shields.io/badge/priority-high-orange)

The SWR cache key for `fetchProgressStreaks` is currently hardcoded as `"progressStreaks"`. Since streak calculations are now timezone-dependent (as `fetchProgressStreaks` accepts a `timeZone` parameter), the cache key should also incorporate the `timeZone`.

Without this, if the user's `timeZone` changes, SWR might return stale streak data cached under the generic key, leading to incorrect information being displayed. 

How about changing the cache key to be dependent on the timezone?

```suggestion
  >(['progressStreaks', timeZone] as const, () => fetchProgressStreaks(timeZone));
```
created_at: 2025-05-17T07:11:01Z
author_association: NONE
diff_hunk: @@ -1,38 +1,65 @@
 import useSWR, { SWRResponse } from "swr";
 import { fetchProgressHistory } from "@/features/progress/api";
-import { useState, useEffect } from "react";
-import { formatISO } from "date-fns";
+import { useState, useEffect, useContext } from "react";
 import { HistoryDates } from "@/features/progress/types/HistoryDates";
+import { getLocalStartofDayUTC, getLocalEndOfDayUTC } from "@/lib/formatDate";
+import { DateContext } from "@/context/DateContext";
 
-export default function useProgressHistory(selectedMonth?: Date) {
-  const [monthStartDate, setMonthStartDate] = useState<string>("");
-  const [monthEndDate, setMonthEndDate] = useState<string>("");
+const getMonthBoundaryDates = (date: Date, timeZone: string) => {
+  const year = date.getFullYear();
+  const month = date.getMonth();
 
-  useEffect(() => {
-    if (selectedMonth) {
-      const year = selectedMonth.getFullYear();
-      const month = selectedMonth.getMonth();
+  const firstDay = new Date(year, month, 1);
+  const lastDay = new Date(year, month + 1, 0);
 
-      const firstDay = new Date(year, month, 1);
-      const lastDay = new Date(year, month + 1, 0);
+  return {
+    startDate: getLocalStartofDayUTC(firstDay, timeZone),
+    endDate: getLocalEndOfDayUTC(lastDay, timeZone),
+  };
+};
 
-      setMonthStartDate(formatISO(firstDay, { representation: "date" }));
-      setMonthEndDate(formatISO(lastDay, { representation: "date" }));
-    } else {
-      setMonthStartDate("");
-      setMonthEndDate("");
-    }
-  }, [selectedMonth]);
+export default function useProgressHistory(selectedMonth: Date) {
+  const { date, timeZone } = useContext(DateContext);
+  const [monthStartDate, setMonthStartDate] = useState<Date>(() => {
+    const { startDate } = getMonthBoundaryDates(
+      selectedMonth || new Date(),
path: src/features/progress/hooks/useProgressHistory.ts
user: login: gemini-code-assist[bot]
body: ![medium](https://img.shields.io/badge/priority-medium-yellow)

The hook's signature defines `selectedMonth` as `Date` (non-nullable). If `selectedMonth` is guaranteed to be a `Date` object, the `|| new Date()` fallback here (and on lines 32 and 40) is redundant. 

Could this fallback hide potential issues where `selectedMonth` might not be passed correctly from the calling component? If `selectedMonth` can indeed be undefined/null, it might be clearer to update its type definition in the hook's parameters to `selectedMonth: Date | undefined` (or null) and handle the default more explicitly if needed.
created_at: 2025-05-17T07:11:01Z
author_association: NONE
diff_hunk: @@ -1,38 +1,65 @@
 import useSWR, { SWRResponse } from "swr";
 import { fetchProgressHistory } from "@/features/progress/api";
-import { useState, useEffect } from "react";
-import { formatISO } from "date-fns";
+import { useState, useEffect, useContext } from "react";
 import { HistoryDates } from "@/features/progress/types/HistoryDates";
+import { getLocalStartofDayUTC, getLocalEndOfDayUTC } from "@/lib/formatDate";
+import { DateContext } from "@/context/DateContext";
 
-export default function useProgressHistory(selectedMonth?: Date) {
-  const [monthStartDate, setMonthStartDate] = useState<string>("");
-  const [monthEndDate, setMonthEndDate] = useState<string>("");
+const getMonthBoundaryDates = (date: Date, timeZone: string) => {
+  const year = date.getFullYear();
+  const month = date.getMonth();
 
-  useEffect(() => {
-    if (selectedMonth) {
-      const year = selectedMonth.getFullYear();
-      const month = selectedMonth.getMonth();
+  const firstDay = new Date(year, month, 1);
+  const lastDay = new Date(year, month + 1, 0);
 
-      const firstDay = new Date(year, month, 1);
-      const lastDay = new Date(year, month + 1, 0);
+  return {
+    startDate: getLocalStartofDayUTC(firstDay, timeZone),
+    endDate: getLocalEndOfDayUTC(lastDay, timeZone),
+  };
+};
 
-      setMonthStartDate(formatISO(firstDay, { representation: "date" }));
-      setMonthEndDate(formatISO(lastDay, { representation: "date" }));
-    } else {
-      setMonthStartDate("");
-      setMonthEndDate("");
-    }
-  }, [selectedMonth]);
+export default function useProgressHistory(selectedMonth: Date) {
+  const { date, timeZone } = useContext(DateContext);
+  const [monthStartDate, setMonthStartDate] = useState<Date>(() => {
+    const { startDate } = getMonthBoundaryDates(
+      selectedMonth || new Date(),
+      timeZone,
+    );
+    return startDate;
+  });
+  const [monthEndDate, setMonthEndDate] = useState<Date>(() => {
+    const { endDate } = getMonthBoundaryDates(
+      selectedMonth || new Date(),
path: src/features/progress/hooks/useProgressHistory.ts
user: login: gemini-code-assist[bot]
body: ![medium](https://img.shields.io/badge/priority-medium-yellow)

Similar to the comment on line 25, if `selectedMonth` is guaranteed to be a `Date`, the `|| new Date()` fallback is unnecessary. This pattern appears again on line 40. Ensuring type consistency and avoiding potentially dead code paths would improve clarity.
created_at: 2025-05-17T07:11:01Z
author_association: NONE
diff_hunk: @@ -1,38 +1,65 @@
 import useSWR, { SWRResponse } from "swr";
 import { fetchProgressHistory } from "@/features/progress/api";
-import { useState, useEffect } from "react";
-import { formatISO } from "date-fns";
+import { useState, useEffect, useContext } from "react";
 import { HistoryDates } from "@/features/progress/types/HistoryDates";
+import { getLocalStartofDayUTC, getLocalEndOfDayUTC } from "@/lib/formatDate";
+import { DateContext } from "@/context/DateContext";
 
-export default function useProgressHistory(selectedMonth?: Date) {
-  const [monthStartDate, setMonthStartDate] = useState<string>("");
-  const [monthEndDate, setMonthEndDate] = useState<string>("");
+const getMonthBoundaryDates = (date: Date, timeZone: string) => {
+  const year = date.getFullYear();
+  const month = date.getMonth();
 
-  useEffect(() => {
-    if (selectedMonth) {
-      const year = selectedMonth.getFullYear();
-      const month = selectedMonth.getMonth();
+  const firstDay = new Date(year, month, 1);
+  const lastDay = new Date(year, month + 1, 0);
 
-      const firstDay = new Date(year, month, 1);
-      const lastDay = new Date(year, month + 1, 0);
+  return {
+    startDate: getLocalStartofDayUTC(firstDay, timeZone),
+    endDate: getLocalEndOfDayUTC(lastDay, timeZone),
+  };
+};
 
-      setMonthStartDate(formatISO(firstDay, { representation: "date" }));
-      setMonthEndDate(formatISO(lastDay, { representation: "date" }));
-    } else {
-      setMonthStartDate("");
-      setMonthEndDate("");
-    }
-  }, [selectedMonth]);
+export default function useProgressHistory(selectedMonth: Date) {
+  const { date, timeZone } = useContext(DateContext);
+  const [monthStartDate, setMonthStartDate] = useState<Date>(() => {
+    const { startDate } = getMonthBoundaryDates(
+      selectedMonth || new Date(),
+      timeZone,
+    );
+    return startDate;
+  });
+  const [monthEndDate, setMonthEndDate] = useState<Date>(() => {
+    const { endDate } = getMonthBoundaryDates(
+      selectedMonth || new Date(),
+      timeZone,
+    );
+    return endDate;
+  });
+
+  useEffect(() => {
+    const { startDate, endDate } = getMonthBoundaryDates(
+      selectedMonth || new Date(),
path: src/features/progress/hooks/useProgressHistory.ts
user: login: gemini-code-assist[bot]
body: ![medium](https://img.shields.io/badge/priority-medium-yellow)

This is the third instance of `selectedMonth || new Date()`. As `selectedMonth` is typed as `Date`, this fallback might be unnecessary. Consider removing it if `selectedMonth` is always provided, or adjust the type signature if it can be optional.
created_at: 2025-05-17T07:11:01Z
author_association: NONE
diff_hunk: @@ -1,38 +1,65 @@
 import useSWR, { SWRResponse } from "swr";
 import { fetchProgressHistory } from "@/features/progress/api";
-import { useState, useEffect } from "react";
-import { formatISO } from "date-fns";
+import { useState, useEffect, useContext } from "react";
 import { HistoryDates } from "@/features/progress/types/HistoryDates";
+import { getLocalStartofDayUTC, getLocalEndOfDayUTC } from "@/lib/formatDate";
+import { DateContext } from "@/context/DateContext";
 
-export default function useProgressHistory(selectedMonth?: Date) {
-  const [monthStartDate, setMonthStartDate] = useState<string>("");
-  const [monthEndDate, setMonthEndDate] = useState<string>("");
+const getMonthBoundaryDates = (date: Date, timeZone: string) => {
+  const year = date.getFullYear();
+  const month = date.getMonth();
 
-  useEffect(() => {
-    if (selectedMonth) {
-      const year = selectedMonth.getFullYear();
-      const month = selectedMonth.getMonth();
+  const firstDay = new Date(year, month, 1);
+  const lastDay = new Date(year, month + 1, 0);
 
-      const firstDay = new Date(year, month, 1);
-      const lastDay = new Date(year, month + 1, 0);
+  return {
+    startDate: getLocalStartofDayUTC(firstDay, timeZone),
+    endDate: getLocalEndOfDayUTC(lastDay, timeZone),
+  };
+};
 
-      setMonthStartDate(formatISO(firstDay, { representation: "date" }));
-      setMonthEndDate(formatISO(lastDay, { representation: "date" }));
-    } else {
-      setMonthStartDate("");
-      setMonthEndDate("");
-    }
-  }, [selectedMonth]);
+export default function useProgressHistory(selectedMonth: Date) {
+  const { date, timeZone } = useContext(DateContext);
+  const [monthStartDate, setMonthStartDate] = useState<Date>(() => {
+    const { startDate } = getMonthBoundaryDates(
+      selectedMonth || new Date(),
+      timeZone,
+    );
+    return startDate;
+  });
+  const [monthEndDate, setMonthEndDate] = useState<Date>(() => {
+    const { endDate } = getMonthBoundaryDates(
+      selectedMonth || new Date(),
+      timeZone,
+    );
+    return endDate;
+  });
+
+  useEffect(() => {
+    const { startDate, endDate } = getMonthBoundaryDates(
+      selectedMonth || new Date(),
+      timeZone,
+    );
+    setMonthStartDate(startDate);
+    setMonthEndDate(endDate);
+  }, [selectedMonth, timeZone]);
 
   const cacheKey =
     monthStartDate && monthEndDate
-      ? (["progressHistory", monthStartDate, monthEndDate] as const)
-      : (["progressHistory"] as const);
+      ? ([
+          "progressHistory",
+          date.toISOString(),
+          monthStartDate,
+          monthEndDate,
+        ] as const)
+      : (["progressHistory", date.toISOString()] as const);
path: src/features/progress/hooks/useProgressHistory.ts
user: login: gemini-code-assist[bot]
body: ![medium](https://img.shields.io/badge/priority-medium-yellow)

The SWR `cacheKey` includes `date.toISOString()` from `DateContext` (line 51 and 55). The primary drivers for fetching history for a specific month seem to be `monthStartDate`, `monthEndDate` (derived from `selectedMonth`), and `timeZone`.

Could you clarify the role of `DateContext.date` in this specific cache key? If it changes for reasons unrelated to the `selectedMonth` being viewed (e.g., it represents a global 'current day' that ticks over), it might cause this hook to refetch data for `selectedMonth` unnecessarily. If its inclusion is intentional for specific re-validation scenarios, that's fine, but it's worth ensuring it doesn't lead to over-fetching.
created_at: 2025-05-17T07:11:01Z
author_association: NONE
diff_hunk: @@ -3,16 +3,19 @@ import {
   fetchProgressStreaks,
   ProgressStreaksResponse,
 } from "@/features/progress/api";
+import { useContext } from "react";
+import { DateContext } from "@/context/DateContext";
 
 export default function useProgressStreaks() {
+  const { timeZone } = useContext(DateContext);
   const {
     data,
     error,
     isLoading,
   }: SWRResponse<ProgressStreaksResponse, Error> = useSWR<
     ProgressStreaksResponse,
     Error
-  >("progressStreaks", fetchProgressStreaks);
+  >("progressStreaks", () => fetchProgressStreaks(timeZone));
path: src/features/progress/hooks/useProgressStreaks.ts
user: login: coderabbitai[bot]
body: _⚠️ Potential issue_

**Add `timeZone` to the SWR key to prevent stale cache**

The fetcher correctly forwards the current `timeZone`, but the cache key is the constant string `"progressStreaks"`.  
If the user changes their timezone mid-session, SWR will keep serving the old data because the key doesn’t change.

```diff
->("progressStreaks", () => fetchProgressStreaks(timeZone));
+(["progressStreaks", timeZone], () => fetchProgressStreaks(timeZone));
```

This guarantees automatic revalidation whenever the timezone mutates.  



<!-- suggestion_start -->

<details>
<summary>📝 Committable suggestion</summary>

> ‼️ **IMPORTANT**
> Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

```suggestion
  const { timeZone } = useContext(DateContext);
  const {
    data,
    error,
    isLoading,
  }: SWRResponse<ProgressStreaksResponse, Error> = useSWR<
    ProgressStreaksResponse,
    Error
  >(
    ["progressStreaks", timeZone],
    () => fetchProgressStreaks(timeZone)
  );
```

</details>

<!-- suggestion_end -->

<details>
<summary>🤖 Prompt for AI Agents</summary>

```
In src/features/progress/hooks/useProgressStreaks.ts around lines 10 to 18, the
SWR cache key is a constant string "progressStreaks" which causes stale data
when the timeZone changes. Fix this by including the timeZone variable in the
SWR key, for example by using an array or a template string that incorporates
timeZone, so that the cache key updates and triggers revalidation whenever
timeZone changes.
```

</details>

<!-- This is an auto-generated comment by CodeRabbit -->
created_at: 2025-05-17T07:12:48Z
author_association: NONE
diff_hunk: @@ -1,38 +1,65 @@
 import useSWR, { SWRResponse } from "swr";
 import { fetchProgressHistory } from "@/features/progress/api";
-import { useState, useEffect } from "react";
-import { formatISO } from "date-fns";
+import { useState, useEffect, useContext } from "react";
 import { HistoryDates } from "@/features/progress/types/HistoryDates";
+import { getLocalStartofDayUTC, getLocalEndOfDayUTC } from "@/lib/formatDate";
+import { DateContext } from "@/context/DateContext";
 
-export default function useProgressHistory(selectedMonth?: Date) {
-  const [monthStartDate, setMonthStartDate] = useState<string>("");
-  const [monthEndDate, setMonthEndDate] = useState<string>("");
+const getMonthBoundaryDates = (date: Date, timeZone: string) => {
+  const year = date.getFullYear();
+  const month = date.getMonth();
 
-  useEffect(() => {
-    if (selectedMonth) {
-      const year = selectedMonth.getFullYear();
-      const month = selectedMonth.getMonth();
+  const firstDay = new Date(year, month, 1);
+  const lastDay = new Date(year, month + 1, 0);
 
-      const firstDay = new Date(year, month, 1);
-      const lastDay = new Date(year, month + 1, 0);
+  return {
+    startDate: getLocalStartofDayUTC(firstDay, timeZone),
+    endDate: getLocalEndOfDayUTC(lastDay, timeZone),
+  };
+};
 
-      setMonthStartDate(formatISO(firstDay, { representation: "date" }));
-      setMonthEndDate(formatISO(lastDay, { representation: "date" }));
-    } else {
-      setMonthStartDate("");
-      setMonthEndDate("");
-    }
-  }, [selectedMonth]);
+export default function useProgressHistory(selectedMonth: Date) {
path: src/features/progress/hooks/useProgressHistory.ts
user: login: coderabbitai[bot]
body: _🛠️ Refactor suggestion_

**Parameter should be optional or the fallback removed**

`selectedMonth` is typed as mandatory, yet the code repeatedly does `selectedMonth || new Date()`, implying it may be `undefined`.

```diff
-export default function useProgressHistory(selectedMonth: Date) {
+export default function useProgressHistory(selectedMonth?: Date) {
```

Aligning the type with actual usage avoids confusion and TypeScript warnings.

<details>
<summary>🤖 Prompt for AI Agents</summary>

```
In src/features/progress/hooks/useProgressHistory.ts at line 21, the parameter
selectedMonth is typed as mandatory but the code treats it as optional by using
selectedMonth || new Date(). To fix this, update the function signature to make
selectedMonth optional by adding a question mark (selectedMonth?: Date), or
alternatively, remove the fallback usage in the code and always require
selectedMonth to be passed. This alignment will prevent confusion and TypeScript
warnings.
```

</details>

<!-- This is an auto-generated comment by CodeRabbit -->
created_at: 2025-05-17T07:12:48Z
author_association: NONE

PR comments:
user: login: coderabbitai[bot]
created_at: 2025-05-17T07:08:59Z
body: <!-- This is an auto-generated comment: summarize by coderabbit.ai -->
<!-- walkthrough_start -->

## Walkthrough

The changes introduce timezone awareness to progress-related API calls and hooks. All relevant API functions now require a timezone parameter and use `Date` objects for date boundaries. Hooks and components are updated to utilize timezone context, ensuring accurate date calculations and data retrieval. Additionally, completion percentage display is rounded for clarity.

## Changes

| File(s)                                                                 | Change Summary                                                                                                                                                                                                                           |
|-------------------------------------------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| `src/features/progress/api/index.ts`                                    | Updated all exported API functions to require a `timezone` parameter and accept `Date` objects for date boundaries. Function signatures and request parameter types were revised for timezone and date accuracy.                          |
| `src/features/progress/hooks/useProgressHistory.ts`                     | Refactored to compute month boundaries using timezone, introduced `getMonthBoundaryDates` helper, and integrated `DateContext` for timezone and date context. SWR cache key and fetcher updated for timezone sensitivity.                |
| `src/features/progress/hooks/useProgressStreaks.ts`                     | Modified to use `DateContext` for timezone and pass it to the API fetcher, ensuring streak data is timezone aware.                                                                                                                       |
| `src/features/progress/components/CalendarDayCircle.tsx`                | Changed calculation of completion percentage to use `Math.round()` for display, improving clarity of the percent value shown in the component.                                                    |

## Sequence Diagram(s)

```mermaid
sequenceDiagram
    participant UI
    participant DateContext
    participant ProgressHooks
    participant API

    UI->>DateContext: Get current date and timezone
    UI->>ProgressHooks: Call useProgressHistory(selectedMonth)
    ProgressHooks->>DateContext: Get timezone and date
    ProgressHooks->>API: fetchProgressHistory(timezone, startDate, endDate)
    API-->>ProgressHooks: Return progress history data
    ProgressHooks-->>UI: Provide data for rendering

    UI->>ProgressHooks: Call useProgressStreaks()
    ProgressHooks->>DateContext: Get timezone
    ProgressHooks->>API: fetchProgressStreaks(timezone)
    API-->>ProgressHooks: Return streak data
    ProgressHooks-->>UI: Provide streak data
```

## Poem

> In the warren of code, we hop with delight,  
> Timezones now guide us from morning to night.  
> Progress and streaks, with dates oh so clear,  
> Rounded and tidy, our data appears.  
> With context and care, our features align—  
> A timezone-aware future, by rabbit design!  
> 🕰️🐇

<!-- walkthrough_end -->
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author_association: NONE
user: login: cloudflare-workers-and-pages[bot]
created_at: 2025-05-17T07:09:38Z
body: ## Deploying tracknstick-com with &nbsp;<a href="https://pages.dev"><img alt="Cloudflare Pages" src="https://user-images.githubusercontent.com/23264/106598434-9e719e00-654f-11eb-9e59-6167043cfa01.png" width="16"></a> &nbsp;Cloudflare Pages

<table><tr><td><strong>Latest commit:</strong> </td><td>
<code>8a095c1</code>
</td></tr>
<tr><td><strong>Status:</strong></td><td>&nbsp;✅&nbsp; Deploy successful!</td></tr>
<tr><td><strong>Preview URL:</strong></td><td>
<a href='https://3a86a080.tracknstick-com.pages.dev'>https://3a86a080.tracknstick-com.pages.dev</a>
</td></tr>
<tr><td><strong>Branch Preview URL:</strong></td><td>
<a href='https://use-timezone-for-history-str.tracknstick-com.pages.dev'>https://use-timezone-for-history-str.tracknstick-com.pages.dev</a>
</td></tr>
</table>

[View logs](https://dash.cloudflare.com/00efad2ed00f1fecd92b68f3ef1b8cee/pages/view/tracknstick-com/3a86a080-5afb-45fb-aab8-01b3b611e8a1)

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