prefix the env with OFFICERDEV_, and keep reading the bare names

PORT, PUBLIC_URL and POSTGRES_URL are names half the software in the world
uses. Bun auto-loads .env into EVERY process started in the platform directory,
so a bare PORT reaches the sidecars, the tools they spawn and anything an agent
runs from here — and a bare POSTGRES_URL reaches things with no business
holding a database credential.

Four parts.

officer-setup now writes OFFICERDEV_-prefixed names, with the reasoning in the
generated file so whoever opens it later knows why.

Every consumer reads `OFFICERDEV_X ?? X` — eleven sites across the databases,
the DAV router, officer-url.mjs, os-user-postgres and two scripts. The bare
name is the FALLBACK, never the source, which is what makes this safe to ship
before every machine has been converted.

`bun run fix:env` converts a file in place. Idempotent, preserves comments and
`export`, leaves the value untouched including an `=` inside it, and refuses to
touch names belonging to other software — prefixing PATH or NODE_ENV does not
rename a variable, it deletes it.

And it runs on every restart from the server settings screen. There rather than
at boot because a restart is the one moment the file can be rewritten and take
effect in the same breath: the process about to start is the one that reads it.
Non-fatal, since the fallback means the worst case is that nothing changed.

gen-index reads either spelling out of the file directly, because it is run by
hand as often as by the setup and a bare shell has no .env loaded.

Verified by converting this machine's own .env: PORT, PUBLIC_URL and the
database all still resolve, gen:index still finds its URL, 1152 pass.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

scripts/setup/officer-setup/lib/env.sh

@@ -60,13 +60,22 @@ write_env() {
 #
 # Everything Officer reads at runtime. Kept at 0600 and owned by ${USERNAME}: it
 # holds the token-signing secret and the database credential.
+#
+# EVERY NAME IS PREFIXED \`OFFICERDEV_\`. Bun auto-loads this file into every
+# process started in the platform directory, so a bare PORT or POSTGRES_URL
+# reaches the sidecars, the tools they spawn and anything an agent runs from
+# here — names half the software in the world already uses. Prefixed, they
+# cannot be picked up by accident.
+#
+# Every consumer reads \`OFFICERDEV_X ?? X\`, so an older unprefixed file still
+# works. \`bun run fix:env\` converts one in place.
 
-PORT="${ENV_PORT}"
+OFFICERDEV_PORT="${ENV_PORT}"
 
 # Where Officer is reached from a browser. Not derivable — see the section.
-PUBLIC_URL="${ENV_PUBLIC_URL}"
+OFFICERDEV_PUBLIC_URL="${ENV_PUBLIC_URL}"
 
-POSTGRES_URL="${POSTGRES_URL}"
+OFFICERDEV_POSTGRES_URL="${POSTGRES_URL}"
 
 ENVF