fix: comprehensive edge case handling and install/uninstall symmetry

Author: draphy

README.md

@@ -70,16 +70,17 @@ If you love that vibe — welcome home.
 ### System Management
 - 🔄 **System updater** (`update-draphyOS`) — Interactive tool for system updates, security patches, and Fedora version upgrades
 - ⬆️ **Config updates** — Update draphyOS configs from GitHub with intelligent three-way merge (preserves your customizations)
-- 📦 **Smart uninstall** — Tracks packages installed by draphyOS for clean removal
-- 🔋 **Battery health** — Configurable charge limit (60-100%) for laptop battery longevity
+- 📦 **Smart uninstall** — Tracks packages installed by draphyOS for clean removal (full reset to pre-install state)
+- 🔋 **Battery health** — Configurable charge limit with auto-detection for 10+ laptop vendors
 - 🔀 **Version migrations** — Seamless upgrades between draphyOS versions
+- 🖥️ **VM detection** — Automatic picom optimizations for virtual machines
 
 ### Development Tools
 - 🐳 **Docker** — Container runtime with rootless setup (user added to docker group)
 - 🟢 **Node.js** — fnm version manager with LTS pre-installed
 - 🐘 **PostgreSQL** — Database server with user/database auto-created
 - 🤖 **Claude Code** — AI coding assistant CLI
-- 🎮 **NVIDIA** — Auto-detection and driver installation (akmod-nvidia)
+- 🎮 **NVIDIA** — Auto-detection, Secure Boot handling, hybrid graphics support (akmod-nvidia)
 
 ---
 
@@ -466,6 +467,12 @@ Auto-detected and installed only if NVIDIA GPU is present.
 | Package | What it does | Why it's here |
 | ------- | ------------ | ------------- |
 | `akmod-nvidia` | NVIDIA driver | Proprietary driver — auto-rebuilds on kernel updates |
+| `switcheroo-control` | GPU switching | Enables hybrid graphics (Intel/AMD + NVIDIA) on laptops |
+
+**Features:**
+- Automatic GPU detection via `lspci`
+- Secure Boot detection with MOK enrollment guidance
+- Hybrid graphics support (switcheroo-control for laptops with dual GPUs)
 
 </details>
 
@@ -584,6 +591,9 @@ Config: `~/.config/gammastep/config.ini`
 - Use `--auto-tune` for automatic power optimization
 - Great for laptops to extend battery life
 
+**TLP vs power-profiles-daemon:**
+The installer automatically handles conflicts between TLP and power-profiles-daemon. If you have TLP installed, power-profiles-daemon is disabled to avoid conflicts.
+
 </details>
 
 <details>
@@ -613,24 +623,40 @@ No setup needed — works automatically with PAM.
 <details>
 <summary><strong>🔋 Battery Charge Limit</strong></summary>
 
-During installation, you can set a charge limit (60-100%) to extend battery lifespan:
-- Reduces battery wear from constant 100% charging
-- Best for laptops that are often plugged in
-- Uses a systemd service to persist across reboots
-
-To change the limit later:
+During installation, you can set a charge limit to extend battery lifespan. The installer automatically detects your laptop brand and uses the appropriate interface.
+
+**Supported Laptops:**
+| Brand | Interface | Limit Type | Notes |
+|-------|-----------|------------|-------|
+| **ThinkPad** (2012+) | natacpi | 60-100% | Native kernel support |
+| **ThinkPad** (pre-2012) | tp_smapi | 60-100% | Requires tp_smapi module |
+| **ASUS** | asus-nb-wmi | 40/60/80/100 | Only these 4 values work |
+| **Dell** | dell-wmi | 55-100% | Requires kernel 6.12+ |
+| **Lenovo IdeaPad** | ideapad_acpi | ~60% toggle | Conservation mode on/off |
+| **Huawei MateBook** | huawei-wmi | 1-100% | Supports start/stop thresholds |
+| **LG Gram** | lg_laptop | 80% toggle | Battery care on/off |
+| **Samsung** | samsung_laptop | ~80% toggle | Battery life extender on/off |
+| **MSI** | msi_ec | Variable | Hardware enforces start=stop-10 |
+| **Framework** | Standard | 1-100% | Stop threshold only |
+| **System76** | Standard | Variable | Open EC firmware only |
+
+**To check/change the limit later:**
 ```bash
-# Check current limit
+# Check current limit (standard interface)
 cat /sys/class/power_supply/BAT0/charge_control_end_threshold
 
-# Set to 80%
+# Set to 80% (standard interface)
 echo 80 | sudo tee /sys/class/power_supply/BAT0/charge_control_end_threshold
 
-# Set back to 100%
-echo 100 | sudo tee /sys/class/power_supply/BAT0/charge_control_end_threshold
+# Lenovo IdeaPad conservation mode
+cat /sys/bus/platform/drivers/ideapad_acpi/VPC*/conservation_mode
+echo 1 | sudo tee /sys/bus/platform/drivers/ideapad_acpi/VPC*/conservation_mode
+
+# Diagnostic info (install TLP first)
+sudo tlp-stat -b
 ```
 
-> **Note:** Not all laptops support charge limits. The installer only offers this if your hardware supports it.
+> **Note:** VMs, desktops, and some older laptops don't support charge limits. The installer auto-detects support.
 
 </details>
 
@@ -639,6 +665,7 @@ echo 100 | sudo tee /sys/class/power_supply/BAT0/charge_control_end_threshold
 
 Docker is pre-configured with your user added to the `docker` group:
 - **Log out and back in** after install to use Docker without sudo
+- cgroups v2 delegation enabled for rootless resource limits
 - Verify: `docker run hello-world`
 
 ```bash
@@ -672,6 +699,7 @@ createdb myapp               # Create new database
 Node.js is managed via fnm (Fast Node Manager):
 - LTS version pre-installed
 - Automatic version switching per project
+- System Node.js conflict detection (warns if `nodejs` package is installed)
 
 ```bash
 # Common commands
@@ -683,6 +711,8 @@ fnm default 20               # Set default version
 
 Add a `.node-version` or `.nvmrc` file to project directories for automatic switching.
 
+> **Note:** If you have system-installed Node.js (`dnf install nodejs`), fnm will still work but you may see version conflicts. The installer warns about this.
+
 </details>
 
 <details>
@@ -778,12 +808,25 @@ The uninstaller is smart about your base system:
 
 ### What Gets Removed
 
-- draphyOS config symlinks
+**Automatic:**
+- draphyOS config symlinks (all 25 config files)
 - System update script (`/usr/local/bin/update-draphyOS`)
-- Battery charge limit service (if configured)
+- Battery charge limit service and udev rules
+- cgroup delegation config (Docker rootless)
 - LightDM customization (restored from backup)
-- Optionally: shell reverted to bash
-- Optionally: backup configs restored
+- GNOME/GTK dark mode settings (reset to defaults)
+- Third-party repositories (Brave, Chrome, VS Code, Docker, yazi COPR)
+- draphyOS state files (checksums, package state, etc.)
+
+**Interactive prompts:**
+- fnm and all Node.js versions
+- Claude Code CLI
+- Docker group membership and service
+- PostgreSQL service
+- switcheroo-control (GPU switching)
+- NVIDIA drivers (with dracut regeneration)
+- Shell revert to bash
+- Backup restoration
 
 ---
 
@@ -880,6 +923,42 @@ update-draphyOS -d
 
 </details>
 
+<details>
+<summary><strong>NVIDIA driver not loading with Secure Boot?</strong></summary>
+
+NVIDIA's proprietary drivers need to be signed for Secure Boot. The installer detects this and provides guidance:
+
+1. After install, reboot and watch for MOK (Machine Owner Key) enrollment prompt
+2. Select "Enroll MOK" → "Continue" → Enter the password shown during install
+3. Reboot again — NVIDIA driver should now load
+
+To check if Secure Boot is blocking the driver:
+```bash
+mokutil --sb-state                    # Check Secure Boot status
+lsmod | grep nvidia                   # Check if driver loaded
+journalctl -b | grep -i nvidia        # Check for errors
+```
+
+</details>
+
+<details>
+<summary><strong>Hybrid graphics (laptop with dual GPU)?</strong></summary>
+
+For laptops with Intel/AMD integrated + NVIDIA discrete GPU, switcheroo-control is auto-enabled:
+
+```bash
+# Check GPU switching status
+switcherooctl list
+
+# Run app on discrete GPU
+switcherooctl launch <app>
+
+# Or use environment variable
+DRI_PRIME=1 <app>
+```
+
+</details>
+
 ---
 
 ## 🤝 Contributing