ODIAN Launcher: hub, installer, local stack and remembered sign-in (M2)

- Tauri 2 + Svelte 5 hub in ODIAN dark: patch notes and roadmap, install and
  update progress, local stack status, settings with DHP and MCP addresses.
- crates/odian-packs: Rust installer for pack format v1 (signed manifests,
  resumable verified downloads from a DHP or an ODIAN drive), byte-compatible
  with ODIAN_MCP_Server's Python odian_packs.
- Local stack on 127.0.0.1: Postgres -> Engine API -> tile server -> Odian.exe,
  one Job Object, clean shutdown; database snapshot restore on a fresh PC only.
- Keycloak sign-in through the DHP's MCP, remembered until Sign out with a
  launcher session that renews the Engine token silently.

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

src/lib/mock-notes.ts

@@ -0,0 +1,75 @@
+// Sample patch notes for the browser mock. They deliberately contain markup
+// that must NOT survive sanitizing (a script, an event handler, a javascript:
+// link): if any of it shows up or runs, the sanitizer is broken.
+
+export type NotesVariant = "full" | "no-roadmap";
+
+const PROBES = `
+<script>alert("patch notes are untrusted")</script>
+<img src="x" onerror="alert('patch notes are untrusted')">
+`;
+
+const ROADMAP = `
+## Roadmap
+
+### Next — 0.53
+- Globally unique IDs across DHPs, the groundwork for merging offline edits.
+- ODIAN assistant in the Chat panel, answering from the ontology.
+- Pattern-of-life (Habits) summary available to the assistant by hex ID.
+
+### Later
+- Merge offline edits back into the DHP database, git-style.
+- Search across entity documents from the map.
+- NATO MIM governance workflow for exported data.
+`;
+
+const NOTES: Record<string, string> = {
+  "0.52.0": `
+# ODIAN 0.52.0
+
+Released 2026-09-12 · required update for all operators on this DHP.
+
+## Highlights
+- **Mission assignment** — target → aircraft tasking now proposes a ranked list. The pick you make is recorded with the solve.
+- **Habits panel** — a pattern-of-life summary for each aircraft, one click from the track card.
+- **Offline map tiles** — the dark basemap \`protomaps_20260423\` ships with the install, so panning and zooming never need the network.
+
+## Improvements
+- Track trails draw about 3× faster above 5,000 live contacts.
+- NATO MIM export validates against the SHACL shapes before it writes anything.
+- The Chat panel keeps its scroll position while new messages arrive.
+- Install and update resume from the last verified file.
+
+## Fixes
+- Fixed a crash when a vessel report had no MMSI.
+- Vessel positions no longer freeze after an AIS feed outage.
+- The replay time slider no longer skips the final minute.
+${PROBES}
+## Known issues
+- The first launch after an install can take up to 60 s while Postgres warms its cache.
+
+> Report problems from **Help → Send diagnostics** inside ODIAN, or read the [operator guide](https://docs.example.invalid/odian/0.52) and [this link](javascript:alert(1)).
+`,
+  "0.51.0": `
+# ODIAN 0.51.0
+
+Released 2026-08-04.
+
+## Highlights
+- **Airspace layers** — restricted and danger areas draw from the DHP's AIXM import.
+- **Track history** — scrub up to 72 h of recorded positions per contact.
+
+## Improvements
+- Startup is 40% faster on machines with a local database.
+- Layer panel remembers which groups you collapsed.
+
+## Fixes
+- Fixed tooltips lingering after the map was dragged.
+- Fixed a rare deadlock when two operators edited the same annotation.
+`,
+};
+
+export function mockNotes(version: string, variant: NotesVariant): string {
+  const body = NOTES[version] ?? `# ODIAN ${version}\n\nNo notes were published for this version.\n`;
+  return variant === "full" ? `${body}${ROADMAP}` : body;
+}