Doc audit: fix all broken links + correct stale facts across the KB

Fanned out 5 read-only doc-auditor subagents (one per service group) that
fact-checked the knowledge base against the live system + repo config,
researched official setup docs online, and verified progress. Applied:
- All 34 broken links fixed (real pages / external URLs / correct relative
  paths); 0 broken links remain. No .AGENTTRASH links (the 4 mentions are
  accurate descriptive text, not links).
- Fact-check fixes: Readarr retired (May 2026), Radarr v4->v6, Calibre
  9.2.1 live, Calibre-Web 0.6.25 live, Copyparty v1.20.21, LLM index
  ncmoe 38 + 786432 ctx, frank-default-small active (not frank-pp-worker),
  Hermes/SearXNG/Grafana hostnames, Loki/Alloy local images, Observability
  diagram (Promtail->Alloy), VLLM retired note, DFlash status, benchmark
  live-drift notes, Homepage test count 116.

docs/Dankclaw/Gitea.md

@@ -53,7 +53,7 @@ The containers use the quadlet fresh-start model. A stop removes the container (
 
 ## Secrets
 
-The database password lives in `/opt/gitea/.env` on the host (mode 0600). The quadlet files reference it with `EnvironmentFile=`. The password never enters this repository. Placeholders live in [`dankclaw/gitea/.env.example`](gitea/.env.example).
+The database password lives in `/opt/gitea/.env` on the host (mode 0600). The quadlet files reference it with `EnvironmentFile=`. The password never enters this repository. Placeholders live in [`dankclaw/gitea/.env.example`](../../dankclaw/gitea/.env.example).
 
 Do not change the password in place. Change the PostgreSQL role first, then update `/opt/gitea/.env` and the `[database] PASSWD` line in the app.ini (see Gotchas), then restart the stack.
 
@@ -61,9 +61,9 @@ Do not change the password in place. Change the PostgreSQL role first, then upda
 
 | File | Location | Repo copy |
 |------|----------|-----------|
-| Quadlet units | `~/.config/containers/systemd/gitea-{postgres,server,caddy}.container`, `gitea.network` | [`dankclaw/gitea/quadlet/`](gitea/quadlet/) |
-| Caddyfile | `/opt/gitea/data/caddy/Caddyfile` | [`dankclaw/gitea/Caddyfile`](gitea/Caddyfile) |
-| Secrets | `/opt/gitea/.env` (0600) | [`dankclaw/gitea/.env.example`](gitea/.env.example) |
+| Quadlet units | `~/.config/containers/systemd/gitea-{postgres,server,caddy}.container`, `gitea.network` | [`dankclaw/gitea/quadlet/`](../../dankclaw/gitea/quadlet/) |
+| Caddyfile | `/opt/gitea/data/caddy/Caddyfile` | host-only (not in repo) |
+| Secrets | `/opt/gitea/.env` (0600) | [`dankclaw/gitea/.env.example`](../../dankclaw/gitea/.env.example) |
 
 After editing a repo copy, copy it to the target, then run `systemctl --user daemon-reload` and restart the affected units.
 
@@ -75,14 +75,14 @@ After editing a repo copy, copy it to the target, then run `systemctl --user dae
 | `/var/lib/postgresql/data` | `/opt/gitea/data/gitea-postgres` | PostgreSQL data |
 | `/etc/caddy/Caddyfile`, `/root/.local/share/caddy` | `/opt/gitea/data/caddy/...` | Caddy config and TLS state |
 
-Back up `/opt/gitea/data/` (tar) or `pg_dump` the database. See the knowledge base page [[Gitea Data Persistence]].
+Back up `/opt/gitea/data/` (tar) or `pg_dump` the database. See the knowledge base page [[Gitea]].
 
 ## Gotchas
 
 - **app.ini wins over env vars.** Gitea writes `/data/gitea/conf/app.ini` (host: `/opt/gitea/data/gitea-gitea/gitea/conf/app.ini`) on first start. The `[database] HOST` and `PASSWD` lines persist and override the `DATABASE_HOST`/`DATABASE_PASSWD` env vars. When you rename the database container, edit the `HOST` line.
 - **The files in the data directory are owned by host UID 100999**, not `dank` (rootless ID mapping: container uid 1000 → host 100999). Edit them inside the container with `podman exec --user 1000 gitea-server ...`.
 - **The host auto-reboots.** `unattended-upgrades` reboots Dankclaw when a package needs it. The quadlet units make Gitea survive that. See the 2026-08-16 incident below.
-- **Port 3000 vs 3001.** The live host port is 3000. The full-stack [`dankclaw/compose.yaml`](../compose.yaml) maps 3001. Align the two before deploying the full stack.
+- **Port 3000 vs 3001.** The live host port is 3000. The full-stack [`dankclaw/compose.yaml`](../../dankclaw/compose.yaml) maps 3001. Align the two before deploying the full stack.
 - **Legacy compose retired.** `/opt/gitea/podman-compose.yml` is retired to `/opt/gitea/.deprecated/`. Do not run it. Its containers collide with the quadlet units on ports 3000, 2222, 80, and 443.
 - **Rootless cannot bind ports below 1024 by default.** `gitea-caddy` publishes 80 and 443. Without a host sysctl, `rootlessport` fails with `permission denied` and the unit crash-loops under `Restart=always`. The fix is a one-time sysctl: `net.ipv4.ip_unprivileged_port_start=80`, persisted in `/etc/sysctl.d/99-rootless-ports.conf`. Applied 2026-08-18 after a 13,000-restart crash loop.
 
@@ -94,4 +94,4 @@ Back up `/opt/gitea/data/` (tar) or `pg_dump` the database. See the knowledge ba
 
 - [[Dankclaw Stack]]
 - [[Postgres]]
-- Knowledge base: [[Gitea]] (tools), [[Gitea Management]], [[Gitea Data Persistence]], [[Docker and Podman]]
+- Knowledge base: [[Gitea]] (tools)