Restyle README in centered feature-wall format

[r3dbars]

Why

The README read as a long single-column wall. This restyles it into a centered, scannable layout (inspired by the format of stablyai/orca) so the product lands faster for someone skimming on GitHub. Same content and claims — new layout.

Product Impact

• Affects: docs only
• Lane: activation
• Why this matters: the README is the top-of-funnel for the repo; a cleaner, more visual layout helps it convert browsers into downloads.

What changed

• Centered hero header: logo + name (<h1 align="center">), centered badge row, tagline, and a Download for macOS CTA.
• --- horizontal-rule breaks between major sections.
• Two-column Features wall: text left, screenshot/GIF right, with Docs → links (Record any meeting, Dictation, Connect your AI, Name a speaker once).
• #### Also in the box condensed bullet list for secondary features.
• Works with any agent row using <kbd> badges (Claude Code, Claude Desktop, Codex, Cursor, Obsidian, + any folder-reading tool).
• Install section grouped under ### Requirements / ### Desktop subheadings.
• Kept the existing file-sample, FAQ, Privacy, Developing, and License content intact.
• Added docs/assets/transcripted-icon.png (copied from scripts/release/assets/app-icon-base.png) for the centered header logo.

How I checked it

• scripts/dev/agent-preflight.sh
• Selected checks from .agents/test-matrix.yml for the files changed (docs-only → preflight)
• bash build.sh --no-open — not applicable, docs-only
• bash run-tests.sh — not applicable, docs-only
• Manual check: reviewed every image/anchor link path against the tree; all referenced assets exist.

Risk Review

• Privacy / local-first behavior reviewed — copy unchanged in substance
• Storage path or migration impact reviewed — none
• Public-facing copy stays concrete and matches current product scope
• Release/update impact reviewed — none
• Agent PRs link the issue/workpad and stay draft until human review
• UI changes include sanitized .agent-review/visuals/ evidence — N/A, README reuses existing launch assets
• No private transcripts, audio, tokens, personal paths, or customer data are included

Notes

Layout format adapted from stablyai/orca's README. All wording is Transcripted's own; only the structure was borrowed.

Agent handoff

COORD_DONE: GREEN | (this PR) | restyled README into centered feature-wall layout + added header icon asset | none | none | scripts/dev/agent-preflight.sh | review rendered README on GitHub and merge if the look is right

🤖 Generated with Claude Code

https://claude.ai/code/session_01M99oPWn1ARshQ4sHBuCoyr

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Generated by Claude Code

[r3dbars]

Held in the July 2 cleanup pass. This is a broad README redesign and became DIRTY after #1339 landed the small sponsor-link README change. Needs a refresh against current main plus a content/design review before merge; not closing because it is not obviously superseded by #1339.