chore(release): 0.3.0

[ThomasK33]

Release prep for v0.3.0 (first 0.3.x cut on top of v0.2.0).

What's in this PR

• Bumps package.json version 0.2.0 → 0.3.0.
• Renames the curated ## [Unreleased] changelog section to ## [v0.3.0] - 2026-06-03 and inserts a fresh empty ## [Unreleased] heading above it (per docs/RELEASE-PROCESS.md, this keeps both headings on main so Release Changelog skips its Communique pass and Update Unreleased Changelog keeps working post-merge). Sub-headings normalized to ### to match every prior released section.

Headline changes since v0.2.0

• agent-tty dashboard — read-only interactive Session Dashboard with a live view fed by Event Log Follow (ADR 0006) (feat: read-only Session Dashboard (agent-tty dashboard) #113).
• Broader inspect --json (host/renderer runtime fields, eventLogBytes) + canonical proof-bundle lock-down (feat(inspect+dogfood): broader inspect --json + canonical bundle lock-down #104).
• Wide-glyph (CJK/emoji) column alignment fix in the libghostty-vt snapshot renderer (fix(renderer): column-align wide-glyph cells in libghostty-vt snapshots #118).
• PROMPT_EOL_MARK= default in spawned shells to keep captures clean (fix: default PROMPT_EOL_MARK= in spawned shells #114).
• README rebuild + hero/agent demos recorded beside a live dashboard (feat: replace coding-agent hero demo #105, docs: add hero demo video playback workflow #106, docs(readme): rebuild for clarity + add launch assets #108, feat(demo): record the hero + Codex/Claude demos beside a live dashboard #116).

Release mechanics

After this merges, the release is finalized by tagging v0.3.0 from synced main (npm run release:finalize), which triggers the Release workflow to publish the GitHub Release and npm package.

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