Bug

The --strength CLI option help text says the default is 0.75, but the actual default in pdd/__init__.py is 1.0.

Evidence

• pdd/__init__.py:12: DEFAULT_STRENGTH = 1.0
• pdd/core/cli.py:220: Help text says "Default: 0.75 or .pddrc value"

Impact

Users who don't explicitly set --strength think they're using 0.75 (mid-tier model) but are actually using 1.0 (most powerful/expensive model). This leads to unexpected API costs.

Fix

Update the help text in pdd/core/cli.py to reflect the actual default of 1.0.