diff --git a/CHANGELOG.md b/CHANGELOG.md
index 53784ba..4a3e5a7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,28 @@
 
 All notable changes to iNTERCEPT will be documented in this file.
 
+## [2.25.0] - 2026-03-12
+
+### Added
+- **SSEManager** - Centralized SSE connection management with exponential backoff reconnection and visual connection status indicator
+- **Loading button states** - `withLoadingButton()` utility for async action buttons across all modes
+- **Actionable error reporting** - `reportActionableError()` added to 5 mode JS files for user-friendly error messages
+- **Destructive action confirmation modals** - Custom modal system replacing 25 native `confirm()` calls
+
+### Changed
+- **Accessibility improvements** - aria-labels on interactive elements, form label associations, keyboard-navigable lists
+- **CSS variable adoption** - Replaced hardcoded hex colors with CSS custom properties across 16+ files
+- **Inline style extraction** - `classList.toggle()` replaces inline `display` manipulation throughout codebase
+- **Merged `global-nav.css` into `layout.css`** - Consolidated navigation styles
+- **Reduced `!important` usage** - Responsive.css `!important` count reduced from 71 to 8
+- **Standardized breakpoints** - Unified to 480/768/1024/1280px across all responsive styles
+- **Mobile UX polish** - Improved touch targets, code overflow handling, and responsive layouts
+
+### Fixed
+- Deep-linked mode scripts now wait for body parse before executing, preventing initialization failures
+
+---
+
 ## [2.24.0] - 2026-03-10
 
 ### Added
diff --git a/config.py b/config.py
index c34fd13..a75d1a8 100644
--- a/config.py
+++ b/config.py
@@ -7,10 +7,21 @@ import os
 import sys
 
 # Application version
-VERSION = "2.24.0"
+VERSION = "2.25.0"
 
 # Changelog - latest release notes (shown on welcome screen)
 CHANGELOG = [
+    {
+        "version": "2.25.0",
+        "date": "March 2026",
+        "highlights": [
+            "UI/UX overhaul — SSEManager with exponential backoff and connection status indicator",
+            "Accessibility improvements — aria-labels, form label associations, keyboard list navigation",
+            "Destructive action confirmation modals replace native confirm() dialogs",
+            "CSS variable adoption, inline style extraction, and reduced !important usage",
+            "Loading button states, actionable error reporting, and mobile UX polish",
+        ]
+    },
     {
         "version": "2.24.0",
         "date": "March 2026",
diff --git a/docs/FEATURES.md b/docs/FEATURES.md
index 11a5ec3..cd5bad0 100644
--- a/docs/FEATURES.md
+++ b/docs/FEATURES.md
@@ -438,6 +438,8 @@ Deploy lightweight sensor nodes across multiple locations and aggregate data to
 
 - **Mode-specific header stats** - real-time badges showing key metrics per mode
 - **UTC clock** - always visible in header for time-critical operations
+- **SSE connection status indicator** - real-time connection state with SSEManager and exponential backoff reconnection
+- **Accessibility** - aria-labels, form label associations, keyboard list navigation, and destructive action confirmation modals
 - **Active mode indicator** - shows current mode with pulse animation
 - **Collapsible sections** - click any header to collapse/expand
 - **Panel styling** - gradient backgrounds with indicator dots
diff --git a/docs/index.html b/docs/index.html
index 5fcdd00..a1315da 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -36,7 +36,7 @@
             </div>
             <div class="hero-stats">
                 <div class="stat">
-                    <span class="stat-value">30+</span>
+                    <span class="stat-value">34</span>
                     <span class="stat-label">Modes</span>
                 </div>
                 <div class="stat">