Update README with comprehensive feature list and 14M+ line scale

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: ozgesolidkey

README.md

@@ -1,18 +1,49 @@
 # LOGAN - Log Analyzer
 
-A fast, feature-rich log file viewer built with Electron.
+A blazing-fast log file viewer built with Electron, designed for **massive log files**. Tested and working with files up to **14 million+ lines** — virtual scrolling keeps it smooth no matter how big the file gets.
 
 ## Features
 
-- **Virtual scrolling** - Handle multi-million line log files smoothly
-- **Fast search** - Powered by ripgrep when available
-- **Multiple tabs** - Open and switch between multiple log files
-- **Bookmarks** - Mark important lines with comments
-- **Highlights** - Color-code patterns (per-file or global)
-- **Save to Notes** - Extract code snippets for later analysis
-- **Minimap** - Visual overview with error/warning indicators
-- **File splitting** - Split large files into manageable parts
-- **Zoom** - Adjust font size with Ctrl+/Ctrl-
+### Core Viewer
+- **Virtual scrolling** — Handles multi-million line files with constant memory usage and smooth 60fps scrolling
+- **Fast search** — Powered by ripgrep (10-100x faster), with regex, wildcard, whole word, and case-sensitive modes
+- **Multiple tabs** — Open and switch between log files without losing state
+- **Minimap** — Bird's-eye overview with color-coded error/warning indicators, click to jump
+- **Word wrap & zoom** — Toggle wrapping, adjust font size with Ctrl+/- or mouse wheel
+- **Column visibility** — Auto-detect delimited columns and show/hide them
+
+### Analysis & Filtering
+- **Log analysis** — Pattern detection, duplicate grouping, level distribution, and time range stats
+- **Advanced filtering** — Multi-group filter expressions (AND/OR), level filters, include/exclude patterns, context lines
+- **Time gap detection** — Find gaps between timestamps with configurable thresholds and line/pattern ranges
+- **Search configs** — Persistent multi-pattern search with color-coded highlighting (Ctrl+8)
+
+### Annotations
+- **Bookmarks** — Mark lines with comments and colors, save/load bookmark sets, export
+- **Highlights** — Color-code patterns with regex support, per-file or global, organized in groups
+- **Notes drawer** — Freeform notes per file with auto-save (Ctrl+Shift+N)
+- **Save snippets** — Extract selected line ranges to `.notes.txt` files for later reference
+
+### Split & Diff
+- **File splitting** — Break huge files into manageable parts
+- **Split view** — View two files side by side
+- **Diff view** — Compare files with aligned hunk display, additions/deletions/modifications
+
+### Video Player
+- **Log-to-video sync** — Open a screen recording alongside logs, set a sync point from any log line, then click lines to seek the video to the corresponding moment (Ctrl+9)
+- **Drag & drop** — Drop MP4/WebM/OGG files directly onto the panel
+- **Per-file persistence** — Video path and sync offset remembered per log file
+
+### Integrations
+- **Built-in terminal** — Quake-style drop-down terminal, auto-cds to file directory (Ctrl+`)
+- **Datadog** — Fetch logs directly from Datadog APIs
+- **Folder browser** — Open folders, browse files, search across multiple files
+- **Activity history** — Track searches, filters, bookmarks, and other actions per file (Ctrl+7)
+
+### Local Persistence
+- Per-file `.logan/` sidecar storage for bookmarks, highlights, notes, video sync, and history
+- Global `~/.logan/` for highlight groups, bookmark sets, and settings
+- State survives across sessions — reopen a file and everything is restored
 
 ## Requirements
 
@@ -88,18 +119,28 @@ npm start
 | Shortcut | Action |
 |----------|--------|
 | Ctrl+O | Open file |
-| Ctrl+F | Find |
+| Ctrl+T | Open in new tab |
+| Ctrl+W | Close tab |
+| Ctrl+Tab / Ctrl+Shift+Tab | Next / previous tab |
+| Ctrl+F | Focus search |
 | F3 / Ctrl+G | Next match |
 | Shift+F3 | Previous match |
 | Ctrl+B | Toggle bookmark |
-| Ctrl+H | Highlight selection |
-| Ctrl+Shift+S | Save to notes |
-| Ctrl++ | Zoom in |
-| Ctrl+- | Zoom out |
-| Ctrl+0 | Reset zoom |
-| Ctrl+Tab | Next tab |
-| Ctrl+Shift+Tab | Previous tab |
-| Ctrl+W | Close tab |
+| Ctrl+H | Highlight all occurrences of selection |
+| Ctrl+Shift+H | Highlight first occurrence per line |
+| Ctrl+Shift+S | Save selected lines to notes |
+| Ctrl++ / Ctrl+- / Ctrl+0 | Zoom in / out / reset |
+| Ctrl+1...7 | Toggle panels (Folders/Stats/Analysis/Gaps/Bookmarks/Highlights/History) |
+| Ctrl+8 | Toggle search configs |
+| Ctrl+9 | Toggle video player |
+| Ctrl+\ | Toggle panel visibility |
+| Ctrl+` | Toggle terminal |
+| Ctrl+Shift+N | Toggle notes drawer |
+| Ctrl+Shift+R | Toggle search results |
+| Alt+Z | Toggle word wrap |
+| Esc | Close active panel/overlay |
+| Shift+Click | Select line range |
+| Right-click | Context menu (bookmark, copy, highlight) |
 
 ## License