docs: update ReadmeModal admin guide for acknowledgment signature and toast notifications

- Added acknowledgment signature workflow to "Logging a Violation" section (step 7)
- Added toast notification step to violation logging workflow (step 9)
- Updated Violation History section: amend now includes acknowledged-by/date fields
- Added PDF acknowledgment rendering note to Violation History
- Added "Toast Notifications" as standalone feature section
- Updated Amendable Fields to include acknowledged_by and acknowledged_date
- Updated Immutability Rules table with ack fields
- Moved acknowledgment signature and toast system to Shipped in roadmap
- Removed acknowledgment signature from Near-term (already shipped)

client/src/components/ReadmeModal.jsx

@@ -23,8 +23,8 @@ function mdToHtml(md) {
     const hm = line.match(/^(#{1,4})\s+(.+)/);
     if (hm) { close(); const lv=hm[1].length, id=hm[2].toLowerCase().replace(/[^a-z0-9]+/g,'-'); out.push(`<h${lv} id="${id}">${inline(hm[2])}</h${lv}>`); i++; continue; }
     if (line.trim().startsWith('|')) {
-      const cells = line.trim().replace(/^\||\|$/g,'').split('|').map(c=>c.trim());
-      if (!inTable) { close(); inTable=true; out.push('<table><thead><tr>'); cells.forEach(c=>out.push(`<th>${inline(c)}</th>`)); out.push('</tr></thead><tbody>'); i++; if (i < lines.length && /^[\|\s\-:]+$/.test(lines[i])) i++; continue; }
+      const cells = line.trim().replace(/^\|||\|$/g,'').split('|').map(c=>c.trim());
+      if (!inTable) { close(); inTable=true; out.push('<table><thead><tr>'); cells.forEach(c=>out.push(`<th>${inline(c)}</th>`)); out.push('</tr></thead><tbody>'); i++; if (i < lines.length && /^[\|\s\:\-]+$/.test(lines[i])) i++; continue; }
       else { out.push('<tr>'); cells.forEach(c=>out.push(`<td>${inline(c)}</td>`)); out.push('</tr>'); i++; continue; }
     }
     const ul = line.match(/^[-*]\s+(.*)/);
@@ -46,7 +46,7 @@ function buildToc(md) {
   }, []);
 }
 
-// ─── Styles ───────────────────────────────────────────────────────────────────
+// ——— Styles ——————————————————————————————————————————————————————————————————
 const S = {
   overlay: { position:'fixed', inset:0, background:'rgba(0,0,0,0.75)', zIndex:2000, display:'flex', alignItems:'flex-start', justifyContent:'flex-end' },
   panel:   { background:'#111217', color:'#f8f9fa', width:'760px', maxWidth:'95vw', height:'100vh', overflowY:'auto', boxShadow:'-4px 0 32px rgba(0,0,0,0.85)', display:'flex', flexDirection:'column' },
@@ -76,7 +76,7 @@ const CSS = `
 .adm tr:hover td { background:#1e1f2e }
 `;
 
-// ─── Admin guide content (no install / Docker content) ────────────────────────
+// ——— Admin guide content (no install / Docker content) ————————————————————
 const GUIDE_MD = `# CPAS Tracker — Admin Guide
 
 Internal tool for CPAS violation documentation, workforce standing management, and audit compliance. All data is stored locally in the Docker container volume — there is no external dependency.
@@ -129,7 +129,9 @@ Use the **+ New Violation** tab.
 4. If the employee has a prior violation of the same type, the **recidivist auto-escalation** rule triggers — the points slider jumps to the maximum allowed for that violation type.
 5. The **tier crossing warning** previews what tier the submission would land the employee in. Review before submitting.
 6. Adjust points using the slider if discretionary reduction is warranted (within the violation's allowed min/max range).
-7. Submit. A **PDF download link** appears immediately — download it for the employee's file.
+7. **Employee Acknowledgment** (optional): if the employee is present and acknowledges receipt, enter their printed name and the acknowledgment date. This replaces the blank signature line on the PDF with a recorded acknowledgment and an "Acknowledged" badge. Leave blank if the employee is not present or declines.
+8. Submit. A **PDF download link** appears immediately — download it for the employee's file.
+9. **Toast notifications** confirm success or surface errors at the top right of the screen. Toasts auto-dismiss after a few seconds.
 
 ---
 
@@ -149,10 +151,12 @@ Visible when the employee has active points. Shows each active violation as a pr
 #### Violation History
 Full record of all submissions — active, negated, and resolved.
 
-- **Amend** — edit non-scoring fields (location, details, witness, submitted-by, incident time) on any active violation. Every change is logged as a field-level diff (old → new) with timestamp. Points, type, and incident date are immutable.
+- **Amend** — edit non-scoring fields (location, details, witness, submitted-by, incident time, acknowledged-by, acknowledged-date) on any active violation. Every change is logged as a field-level diff (old → new) with timestamp. Points, type, and incident date are immutable.
 - **Negate** — soft-delete a violation with a resolution type and notes. The record is preserved in history; the points are immediately removed from the score. Fully reversible via **Restore**.
 - **Hard delete** — permanent removal. Use only for genuine data entry errors.
-- **PDF** — download the formal violation document for any historical record.
+- **PDF** — download the formal violation document for any historical record. If the violation has an employee acknowledgment on record, the PDF shows the filled-in name and date instead of blank signature lines.
+
+All actions trigger **toast notifications** confirming success or surfacing errors.
 
 #### Edit Employee
 Update name, department, or supervisor. Changes are logged to the audit trail.
@@ -178,7 +182,7 @@ The audit log is the authoritative record for compliance review. Nothing in it c
 
 Amendments allow corrections to a violation's non-scoring fields without deleting and re-submitting, which would disrupt the audit trail and the prior-points snapshot.
 
-**Amendable fields:** incident time, location, details, submitted-by, witness name.
+**Amendable fields:** incident time, location, details, submitted-by, witness name, acknowledged-by, acknowledged-date.
 
 **Immutable fields:** violation type, incident date, point value.
 
@@ -186,6 +190,19 @@ Each amendment stores a before/after diff for every changed field. Amendment his
 
 ---
 
+### Toast Notifications
+
+All user actions across the application produce **toast notifications** — small slide-in messages at the top right of the screen.
+
+- **Success** (green) — violation submitted, PDF downloaded, employee updated, etc.
+- **Error** (red) — API failures, validation errors, PDF generation issues
+- **Warning** (gold) — missing required fields, policy alerts
+- **Info** (blue) — general informational messages
+
+Toasts auto-dismiss after a few seconds (errors persist longer). Each toast has a progress bar countdown and a manual dismiss button. Up to 5 toasts can stack simultaneously.
+
+---
+
 ## Immutability Rules — Quick Reference
 
 | Action | Allowed? | Notes |
@@ -194,6 +211,7 @@ Each amendment stores a before/after diff for every changed field. Amendment his
 | Edit incident date | No | Immutable after submission |
 | Edit point value | No | Immutable after submission |
 | Edit location / details / witness | Yes | Via Amend |
+| Edit acknowledged-by / acknowledged-date | Yes | Via Amend |
 | Negate (void) a violation | Yes | Soft delete; reversible |
 | Hard delete a violation | Yes | Permanent; use sparingly |
 | Edit employee name / dept / supervisor | Yes | Logged to audit trail |
@@ -217,6 +235,8 @@ Each amendment stores a before/after diff for every changed field. Amendment his
 - Employee notes and flags with quick-add HR tags
 - Point expiration timeline with tier-drop projections
 - In-app admin guide (this panel)
+- Acknowledgment signature field — employee name + date on form and PDF
+- Toast notification system — global feedback for all user actions
 
 ---
 
@@ -224,7 +244,6 @@ Each amendment stores a before/after diff for every changed field. Amendment his
 
 These are well-scoped additions that fit the current architecture without major changes.
 
-- **Acknowledgment signature field** — "received by employee" name + date on the violation form; prints on the PDF in place of the blank signature line. Addresses the most common field workflow gap.
 - **CSV export** — one endpoint returning violations or dashboard data as a downloadable CSV for payroll or external reporting.
 - **Supervisor-scoped view** — filter the dashboard to a single supervisor's team via URL param; useful in multi-supervisor environments without requiring full auth.
 
@@ -253,7 +272,7 @@ These require meaningful infrastructure additions and should be evaluated agains
 - **Dark/light theme toggle** — UI is currently dark-only.
 `;
 
-// ─── Component ────────────────────────────────────────────────────────────────
+// ——— Component ——————————————————————————————————————————————————————————————
 export default function ReadmeModal({ onClose }) {
   const bodyRef = useRef(null);
   const html    = mdToHtml(GUIDE_MD);