chore: rebrand from Kon/Corbie to Magnotia

Replace all instances of the legacy product names "Kon" and "Corbie" with
"Magnotia" across user-facing copy, code identifiers, package names, bundle
ids, file paths, and documentation. Preserves the unrelated "konsole" (KDE
terminal) reference and the parent CORBEL company name.

- Renames 10 Rust crates (kon-* → magnotia-*) and the tauri binary
- Updates package.json, tauri.conf.json (productName + identifier)
- Renames CSS classes (kon-rh-* → magnotia-rh-*) and animations
- Renames brand and roadmap docs
- Regenerates Cargo.lock and package-lock.json

Verified: svelte-check passes; pure-rust crates compile under new names.

docs/superpowers/audits/2026-04-25-phase10a-static-slice.md

@@ -182,34 +182,34 @@ Three workflows in `.github/workflows/`:
 
 ## Clean-install test plan
 
-Run on a spare user account or a fresh VM, with no prior Corbie /
-Kon data. Three iterations: one per platform.
+Run on a spare user account or a fresh VM, with no prior Magnotia /
+Magnotia data. Three iterations: one per platform.
 
 1. Install the artefact from the platform's `build.yml` output.
-2. Launch from a clean shell (`corbie` from PATH, or the .app /
+2. Launch from a clean shell (`magnotia` from PATH, or the .app /
    Start-menu shortcut).
 3. Verify first-run setup flow renders. Walk through the Whisper /
    LLM model download for the smallest tier.
 4. Confirm app data lands at the expected path:
-   - Linux: `~/.local/share/kon/` (will become `~/.local/share/
-     corbie/` after Phase 10b rename).
-   - macOS: `~/Library/Application Support/com.corbel.kon/`.
-   - Windows: `%APPDATA%\com.corbel.kon\`.
+   - Linux: `~/.local/share/magnotia/` (will become `~/.local/share/
+     magnotia/` after Phase 10b rename).
+   - macOS: `~/Library/Application Support/com.corbel.magnotia/`.
+   - Windows: `%APPDATA%\com.corbel.magnotia\`.
 5. Record a 10-second brain-dump → cleanup → task extraction.
    Confirm no log leakage to stderr that references `target/` or
    dev-only paths.
-6. Quit the app. Open the SQLite db (`kon.db` for now) and verify
+6. Quit the app. Open the SQLite db (`magnotia.db` for now) and verify
    `SELECT version FROM schema_version ORDER BY version DESC LIMIT
    1` returns `14`.
 7. Re-launch. Confirm settings persist, history shows the test
    transcript with manual + LLM tags.
 8. Optional but recommended: launch with `RUST_LOG=debug` once and
    archive the log. Anything referencing `/home/jake/Documents/
-   CORBEL-Projects/kon/target/` is a dev-leak bug.
+   CORBEL-Projects/magnotia/target/` is a dev-leak bug.
 
 For Phase 10c this gets re-run after the rename sweep to confirm
-the migration shim correctly moves `~/.local/share/kon/` →
-`~/.local/share/corbie/` and renames `kon.db` → `corbie.db`.
+the migration shim correctly moves `~/.local/share/magnotia/` →
+`~/.local/share/magnotia/` and renames `magnotia.db` → `magnotia.db`.
 
 ## Walkthrough checklist (deferred from Phase 9d)
 
@@ -255,7 +255,7 @@ def contrast(c1, c2):
 
 ## Anchors
 
-- Roadmap: [docs/roadmap/2026-04-23-corbie-feature-complete-roadmap.md](../../roadmap/2026-04-23-corbie-feature-complete-roadmap.md)
+- Roadmap: [docs/roadmap/2026-04-23-magnotia-feature-complete-roadmap.md](../../roadmap/2026-04-23-magnotia-feature-complete-roadmap.md)
 - Phase 9 spec: [docs/superpowers/specs/2026-04-24-phase9-polish-debt-design.md](../specs/2026-04-24-phase9-polish-debt-design.md)
 - Release-blocker index: [docs/issues/README.md](../../issues/README.md)
 - Latest handover: [HANDOVER.md](../../../HANDOVER.md)