naming: 'Safe content' doesn't say what it is — rename, and open the authoring page to more content kinds

[genwave-radio]

From docs/THOUGHTS.md.

"Safe content" made sense from the inside (never-dead-air safety net) but conveys nothing to a new operator — safe from what? It's really station-maintenance audio. Consider renaming (Patter? Station audio? Standby content?) and generalizing the authoring page to other kinds: station IDs, jingles, sweepers — same render→measure→catalog pipeline, different kind tag.

Naming note: whatever wins must stay coherent with the taste-exclusion law (gh-#99: safe content is functional audio, never rateable) — the name should make THAT rule feel obvious too.

[genwave-radio]

📛 Naming decided (Dean, 2026-07-29): "Station Imaging" — the radio-industry term for exactly this bucket (IDs, jingles, sweepers, liners), fitting the product's radio fiction. "Always airable" becomes a badge/property, not the name. Scope when picked up: rename the surface (nav, page, help copy — internal setting keys per usual key-stability rules), and open authoring to content kinds (Liner / Station ID / Jingle / Promo) per the original notes. Rejected: "Generated Content" (collides with LLM-generated patter; this content is authored), "Patter" (already means the LLM's live talk).