chore: complete ManaCore → Mana rename (docs, go modules, plists, images)

Final cleanup of references missed in previous rename commits:

- Dockerfiles: PUBLIC_MANA_CORE_AUTH_URL → PUBLIC_MANA_AUTH_URL
- Go modules: github.com/manacore/* → github.com/mana/* (7 go.mod files)
- launchd plists: com.manacore.* → com.mana.* (14 files renamed + content)
- Image assets: *_Manacore_AI_Credits* → *_Mana_AI_Credits* (11 files)
- .env.example files: ManaCore brand strings → Mana
- .prettierignore: stale apps/manacore/* paths → apps/mana/*
- Markdown docs (CLAUDE.md, /docs/*): mana-core-auth → mana-auth, etc.

Excluded from rename: .claude/, devlog/, manascore/ (historical content),
client testimonials, blueprints, npm package refs (@mana-core/*).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

scripts/mac-mini/launchd/com.mana.weekly-report.plist

@@ -0,0 +1,37 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+    <key>Label</key>
+    <string>com.mana.weekly-report</string>
+
+    <key>ProgramArguments</key>
+    <array>
+        <string>/bin/bash</string>
+        <string>/Users/mana/projects/mana-monorepo/scripts/mac-mini/weekly-report.sh</string>
+    </array>
+
+    <!-- Run every Sunday at 10:00 AM -->
+    <key>StartCalendarInterval</key>
+    <dict>
+        <key>Weekday</key>
+        <integer>0</integer>
+        <key>Hour</key>
+        <integer>10</integer>
+        <key>Minute</key>
+        <integer>0</integer>
+    </dict>
+
+    <key>StandardOutPath</key>
+    <string>/tmp/mana-weekly-report.log</string>
+
+    <key>StandardErrorPath</key>
+    <string>/tmp/mana-weekly-report.error.log</string>
+
+    <key>EnvironmentVariables</key>
+    <dict>
+        <key>PATH</key>
+        <string>/usr/local/bin:/opt/homebrew/bin:/usr/bin:/bin</string>
+    </dict>
+</dict>
+</plist>