feat: v3.5.0 — classic/bold redesigned as 5-row shade weights for exact footprint parity

[aedneth]

Summary

Dogfooding v3.4.1 in a minimized window surfaced two persistent issues with classic/bold:

1. They still didn't match the exact dimensions (width/height/footprint) of the other four styles — so cycling styles with d broke the visual composition.
2. In a minimized, non-zen window, pressing the style cycle to classic/bold showed the plain block style instead (a silent fallback), while every other style rendered perfectly.

Root cause: classic/bold were defined as 9-row tall letterforms (STYLE_METRICS rows: 9 vs 5 for every other style). A 9-row glyph physically cannot occupy the same 5 rows as block/simple/outline/minimal, so the v3.4.1 footprint logic did the only thing it could in a short window — fell back to block — and in taller windows they towered / covered the goal. No scaling trick fixes this; the fonts themselves had to become 5 rows.

Fix: Redesign classic/bold as 5-row shade-weight variants of block — the EXACT same 5-row × 4-col geometry, inked with ▒ (classic, light weight) / ▓ (bold, heavy) instead of full █. All six styles now share one identical footprint; classic/bold render their own ink at every window size, never falling back to block or hiding the goal. The tall-font / fallback-to-block path is removed from planCounter; uniformCounterScale becomes a thin wrapper.

What changed

• src/lib/bigfont.ts — classic/bold STYLE_METRICS → {rows:5,digitW:4,colonW:1} (parity with block); render classic as block geometry inked ▒, bold inked ▓; removed the 9-row glyph tables + renderTallSolid; uniformCounterScale simplified.
• src/tui/views/session.ts — planCounter simplified to a single 5-row ladder (no isTall/tallKeepsFootprint/block fallback).
• src/schemas/config.ts — classic/bold docstrings updated.
• tests — bigfont.test.ts + session-view.test.ts updated for 5-row ▒/▓ fonts: base-row parity, exact width/row-count parity with block, classic→▒ / bold→▓ (never █), and "no fallback to block in a tight window" guards.
• docs — README (style descriptions, samples, config table, roadmap), CHANGELOG [3.5.0], version bump.

Verification

• build ✓ · typecheck ✓ · lint ✓ · 604 tests ✓
• Empirical sweep across 1189 windows (w 60–140 × h 12–40): classic/bold glyph-row footprint == block in every window; 0 fallbacks to block; goal visibility consistent across all six styles.

🤖 Generated with Claude Code