Add OSHA Form 301 and Osha page components

- Implemented Form301 component for displaying OSHA Form 301 equivalent, including employee and case information.
- Created Osha component to manage OSHA recordkeeping, including tabs for 300 Log, 300A Summary, Hours & rates, and Submit to OSHA.
- Added functionality for printing and downloading CSV files for OSHA submissions.
- Integrated loading and error handling states for data fetching.

docs/API.md

@@ -138,12 +138,37 @@ The token goes in the `X-Kiosk-Token` header. Browsers can't send custom headers
 
 The web app opens links at `/k/<token>`, optionally with `?site=<id>&area=<id>` to pre-fill the location (as QR codes do).
 
+## OSHA recordkeeping
+
+All endpoints need **safety_manager**: they hold confidential medical information. Other roles only see `injuredCount` on an incident. Rules are in [`shared/osha.ts`](../shared/osha.ts); section numbers refer to 29 CFR 1904.
+
+| Method | Path | Notes |
+| --- | --- | --- |
+| GET | `/api/osha/incidents/:number/cases` | Injured or ill people on an incident |
+| POST | `/api/osha/incidents/:number/cases` | `{ name, ...answers }`. Case number is the incident reference, with `-2`, `-3`… for further people |
+| PATCH | `/api/osha/cases/:id` | Any case field. `recordable` and `outcome` are always recalculated from the answers; days away + restricted may not exceed 180 |
+| DELETE | `/api/osha/cases/:id` | |
+| GET | `/api/osha/cases/:id/301` | Data for Form 301 |
+| GET | `/api/osha/log?siteId=&year=` | 300 Log rows, 300A totals, monthly hours, annual average employees, TRIR/DART/LTIR, ITA checks, missing establishment fields |
+| GET/PUT | `/api/osha/sites/:id/hours?year=` | Monthly `{ month, hours, averageEmployees }`; `null` for both clears a month |
+| GET | `/api/osha/ita/summary.csv?year=` | ITA Establishment and 300A file, one row per active site |
+| GET | `/api/osha/ita/cases.csv?year=` | ITA case data (Forms 300/301) file, without names |
+
+**Case answers:** `employmentType`, `workRelated`, `newCase`, `died`, `dateOfDeath`, `daysAwayFromWork`, `daysAway`, `restrictedOrTransfer`, `daysRestricted`, `medicalTreatment`, `lossOfConsciousness`, `significantDiagnosis`, `specialCase` (`none`, `needlestick`, `medical_removal`, `hearing_loss`, `tuberculosis`), `caseType` (300 column M), `privacyCase`, severe-injury flags (`inpatientHospitalization`, `amputation`, `lossOfEye`, `reportedToOshaAt`) and the Form 301 fields (`jobTitle`, `natureOfInjury`, `bodyPart`, `objectSubstance`, `activityBefore`, `whatHappened`, `dateOfBirth`, `dateOfHire`, `sex`, `employeeAddress`, `physicianName`, `treatmentFacility`, `treatedInEmergencyRoom`, `timeStartedWork`).
+
+Responses include `severeReport` (`{ withinHours, reasons, dueBy }`) when 1904.39 requires a direct report, and `missingFields` listing what Form 301 and the ITA still need. A case newly needing a direct report emails safety managers and admins.
+
+Site establishment fields (`streetAddress`, `city`, `state`, `zip`, `naicsCode`, `industryDescription`, `ein`, `establishmentType`) are set with `PATCH /api/sites/:id`.
+
 ## Stats
 
 | Method | Path | Who | Notes |
 | --- | --- | --- | --- |
 | GET | `/api/stats/overview` | signed in | Open incidents, actions due/overdue, average close time, status counts, weekly trend (12 weeks), incidents by site this year |
-| GET | `/api/stats/analytics` | signed in | `?days=` (7–730, default 90): counts by type and severity, top root-cause category, on-time action rate, monthly completions |
+| GET | `/api/stats/analytics` | signed in | `?from=YYYY-MM-DD&to=YYYY-MM-DD` (up to 3 years), optional `siteId`, `type`. Leading/lagging KPIs with the previous period, trend (weekly up to ~3 months, else monthly), locations, root causes, weekday × hour heatmap, actions on time vs late, and for supervisors+ rolling 12-month TRIR/DART and yearly rates |
+| GET | `/api/views?page=analytics\|incidents` | signed in | Your saved views plus shared ones |
+| POST | `/api/views` | signed in | `{ page, name, filters, shared }`. Sharing needs supervisor |
+| DELETE | `/api/views/:id` | owner or admin | |
 
 Stats only count what the signed-in user can see.