Fix/leaderboard timing improvements (#60)

* Fix leaderboard timing issues with comprehensive improvements

- Add maximum display time cap (120s) to prevent hanging
- Implement dynamic scroll speed tracking with runtime measurements
- Simplify complex timing logic that was causing hangs
- Add enhanced progress tracking and logging
- Add configurable safety buffer (10s)
- Update config template with new timing options
- Add comprehensive test suite for timing logic

Fixes the 30-second hanging issue reported in PR #53 by providing
multiple layers of protection against time overestimation.

* Simplify leaderboard timing to use long timeout with exception-based ending

- Remove complex dynamic duration calculations
- Remove safety buffer complexity
- Remove scroll speed tracking and measurements
- Use simple 10-minute timeout (600s) for both display_duration and max_display_time
- Let content determine when display is complete via existing StopIteration logic
- Update display controller to use simplified duration approach
- Clean up config template to remove unused timing settings

This approach is much more reliable than trying to predict content duration
and eliminates the hanging issues reported in PR #53.

* Fix configuration structure to use centralized display_durations

- Remove redundant display_duration from leaderboard section
- Use main display_durations.leaderboard (300s) for fixed duration mode
- Update leaderboard manager to read from centralized config
- Increase leaderboard default duration from 60s to 300s for better content coverage
- Maintain dynamic_duration option for user choice between fixed/dynamic modes
- Add comprehensive scroll behavior analysis and testing

This completes the leaderboard timing improvements with proper config structure.

* scroll every frame to be smoother like the stock ticker instead of waiting  per subsecond

* leaderboard block api calls while scrolling

* leaderboard debugging

* added leaderboard fps logging

* leaderboard frame control and optimizations

* background update memory leak for scrolling text found and first solution applied

* tuning scroll speeds

* working display scrolls

* revert scroll delay to 0.01 (about 100fps)

* revert min duration of leaderboard

* remove onetime test scripts

config/config.template.json

@@ -39,7 +39,7 @@
             "daily_forecast": 30,
             "stock_news": 20,
             "odds_ticker": 60,
-            "leaderboard": 60,
+            "leaderboard": 300,
             "nhl_live": 30,
             "nhl_recent": 30,
             "nhl_upcoming": 30,
@@ -197,13 +197,11 @@
         "update_interval": 3600,
         "scroll_speed": 1,
         "scroll_delay": 0.01,
-        "display_duration": 60,
         "loop": false,
         "request_timeout": 30,
         "dynamic_duration": true,
-        "min_duration": 45,
-        "max_duration": 600,
-        "duration_buffer": 0.1,
+        "min_duration": 30,
+        "max_display_time": 600,
         "background_service": {
             "enabled": true,
             "max_workers": 3,