release: v0.50.102–v0.50.108 batch (code blocks, utf-8, image URLs, deletion warning, PermissionError, Docker docs, kimi-k2.5) (#755)

## Batch release: v0.50.102 – v0.50.108

Seven self-built PRs reviewed and approved by @nesquena, now consolidated into a single release branch.

### Included fixes

| Version | PR | What it fixes |
|---|---|---|
| v0.50.102 | #746 | Code blocks lose newlines when not preceded by blank line (fixes #745) |
| v0.50.103 | #743 | `encoding='utf-8'` on `write_text()` in `api/profiles.py` — Windows `.env` detection (fixes #741) |
| v0.50.104 | #735 | Agent `MEDIA:localhost:*` image URLs rewritten to `document.baseURI` — remote users get working images (fixes #642) |
| v0.50.105 | #736 | Profile deletion warning strengthened: "permanently deleted, cannot be undone" across all 6 locales (fixes #637) |
| v0.50.106 | #738 | Catch `PermissionError` in `_signing_key()` — three-container Docker UID mismatch no longer crashes all HTTP requests |
| v0.50.107 | #737 | Docs: three-container UID/GID alignment guide in README + `HERMES_UID`/`HERMES_GID` forwarded in compose (fixes #645) |
| v0.50.108 | #742 | Add `kimi-k2.5` to Kimi/Moonshot provider model list (fixes #740) |

### Testing
- **pytest**: 1510 passed, 1 warning (1 pre-existing unrelated failure excluded)
- **QA harness**: 20/20 passed (`~/WebUI/scripts/run-browser-tests.sh`)
- **Browser**: layout, slash autocomplete width, edit button, image URL rewrite, profile deletion dialog all verified

All PRs reviewed and approved by @nesquena. Ready to merge and tag **v0.50.108**.

docker-compose.three-container.yml

@@ -28,6 +28,8 @@ services:
       - hermes-agent-src:/opt/hermes
     environment:
       - HERMES_HOME=/root/.hermes
+      - HERMES_UID=${HERMES_UID:-10000}
+      - HERMES_GID=${HERMES_GID:-10000}
     restart: unless-stopped
     deploy:
       resources:
@@ -47,6 +49,8 @@ services:
       - hermes-home:/root/.hermes
     environment:
       - HERMES_HOME=/root/.hermes
+      - HERMES_UID=${HERMES_UID:-10000}
+      - HERMES_GID=${HERMES_GID:-10000}
       # Dashboard connects to the gateway for health/session data
       - GATEWAY_HEALTH_URL=http://hermes-agent:8642
     depends_on:
@@ -90,6 +94,12 @@ services:
       #   echo "UID=$(id -u)" >> .env && echo "GID=$(id -g)" >> .env
       - WANTED_UID=${UID:-1000}
       - WANTED_GID=${GID:-1000}
+      # NOTE: When using bind-mount volumes shared across containers, ALL containers
+      # that write to the same host directory must run as the same UID/GID.
+      # If hermes-agent initialises the state dir as root (UID 0), hermes-webui
+      # will get a PermissionError accessing those paths — including a crash on every
+      # HTTP request if the auth signing-key file is unreadable. Either set WANTED_UID
+      # to match the agent container's UID, or use a named Docker volume (preferred).
       # Optional: set a password for remote access
       # - HERMES_WEBUI_PASSWORD=your-secret-password
     restart: unless-stopped