fix(status): add space after AM indicator; add statusStyle setting to reduce noise

[alexander-potemkin]

Summary

Two small improvements to the status line:

1. Add space after AM indicator — AM● → AM ●, consistent with pi-landstrip's ● Sandbox styling. One-character fix in the template literal.

2. Add statusStyle setting — "full" (default, current behavior) or "minimal" (show AM ● alone until the first action is checked or blocked, then show counters). Eliminates a:0 d:0 startup noise while preserving the diagnostic signal when the classifier blocks something (d:1 prompts you to check /automode denials).

Why

The a:0 d:0 counters at session start add visual noise with no informational value — nothing has been classified yet. But completely hiding the counters loses the signal when denials happen. The "minimal" style is the middle ground: quiet at start, informative once the classifier is active.

The spacing fix is cosmetic but makes the footer consistent across extensions.

Changes

• extensions/auto-mode/state.ts: add space in template literal; respect statusStyle setting
• extensions/auto-mode/types.ts: add StatusStyle type, statusStyle fields in AutoModeSettings and EffectiveConfig
• extensions/auto-mode/config.ts: read statusStyle in buildEffectiveConfigFromSources and applyAutoModeScalars; default "full"
• tests/auto-mode.test.ts: update existing tests for spacing; add tests for minimal/full styles and config precedence
• README.md: document statusStyle

Backward compatibility

Default is "full" — existing users see no behavior change except the added space (AM● → AM ●). The space-only change is cosmetic and unlikely to break anyone parsing the status line (it's a display string, not a machine interface).

[alexander-potemkin]

Hi! The PR is prepared with LLM - but I'm here to take all the shame and responsibility, if something is off!

And thank you for the extension!