feat: ring shapes, auth reuse, input tests, README docs, CI improvements

- Add --ring-shape (circle/square/diamond/hexagon/pill) with geometry module
- Reuse PAM context across auth attempts (no reload per-keystroke)
- Proper error propagation in screenshot effects (unwrap → Result + context)
- Remove theme presets (modern/pixel/glass) and --theme flag
- Add input cooldown after failed attempt (400ms debounce)
- Add Ctrl+held peek password, Home/End/Delete cursor keys
- Add all input unit tests (23 new tests)
- Add --max-dots, feedback duration, timeout, interval config options
- Add --log-path, --auth-timeout, verifying_color config fields
- Remove unused deps: futures, gio, env_logger, num-traits, thiserror, bytemuck
- Fix media bar: remove stop button, fix art+text overlap, uniform hit areas
- Fix CI: source-only releases, nightly prereleases, dependabot groups, labeler paths
- Update issue templates with structured forms
- Add stale workflow for inactive issues/PRs
- Update README: full options table (28 flags), remove theme docs, add shapes

.github/ISSUE_TEMPLATE/bug_report.md

@@ -1,23 +1,55 @@
-# Bug Report
+---
+name: Bug Report
+about: Report a crash, visual glitch, or unexpected behavior
+labels: bug
+---
 
-**Description**
+## Description
 
+A clear and concise description of the bug.
 
-**Steps to Reproduce**
+## Steps to Reproduce
 
+1. 
+2. 
+3. 
 
-**Expected Behavior**
+## Expected Behavior
 
+What did you expect to happen?
 
-**Actual Behavior**
+## Actual Behavior
 
+What actually happened? Include any error messages, visual glitches, or crashes.
 
-**Environment**
-- OS: 
-- Rust version: 
-- RustLock version: 
+## Screenshots / Screen Recordings
 
-**Logs**
+If applicable, add screenshots or recordings to help explain the problem.
 
+## Environment
 
-**Additional Context**
+- **Compositor:** (e.g., Hyprland, Sway, River, Niri)
+- **Compositor version:** (e.g., Hyprland 0.47.0)
+- **rustlock version:** (`rustlock --version`)
+- **Display configuration:** (single monitor, multi-monitor, mixed DPI, etc.)
+- **OS/Distro:** (e.g., Arch Linux, Ubuntu 24.04, Fedora 41)
+
+## Config / CLI flags
+
+```sh
+# The exact command you used to start rustlock
+# e.g., rustlock --debug --effect-blur 5x2 --theme modern
+```
+
+## Logs
+
+```
+# Paste any relevant logs here
+# Run with --debug --log-file to capture verbose logs
+```
+
+## Confirmations
+
+- [ ] I searched existing issues and this is not a duplicate
+- [ ] I am running the latest version of rustlock
+- [ ] I have included relevant logs and environment details