chore(workflows): add repo_push-repos and repo_backup-and-push workflows

.windsurf/workflows/repo_backup-and-push.md

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+---
+description: Backup main branches then push all repos to origin in sequence
+---
+
+# Backup & Push All Repos
+
+Combines `/repo_backup-main-branch` and `/repo_push-repos` into a single sequential workflow. Ideal for end-of-session save-all.
+
+## Step 1: Backup main branches
+
+Creates timestamped backup branches with smart duplicate detection.
+
+// turbo
+Run `bash scripts/backup-main.sh` from any repository root
+
+## Step 2: Push all repos to origin
+
+// turbo
+
+```bash
+for repo in learning_ai_common_plat learning_voice_ai_agent learning_multimodal_memory_agents; do
+  echo "━━━ Pushing $repo ━━━"
+  (cd ~/code/mygh/$repo && git push origin main 2>&1)
+done
+echo ""
+echo "✨ All repos pushed!"
+```
+
+## What it does:
+
+1. **Backup** — creates timestamped backup branches, cleans up old ones (7 days), skips duplicates
+2. **Push** — pushes `main` to `origin/main` for all 3 repos
+
+## Repositories:
+
+- learning_ai_common_plat
+- learning_voice_ai_agent
+- learning_multimodal_memory_agents
+
+## When to use:
+
+- End of a work session
+- Before switching machines
+- After a batch of commits across repos
+- Anytime you want a safe checkpoint + sync to remote
+
+## Notes:
+
+- Backup runs first so the backup branch includes the latest local commits
+- Push only pushes `main` — backup branches are pushed by the backup script itself
+- If push fails (diverged remote), run `/repo_sync-repos` first to pull

.windsurf/workflows/repo_push-repos.md

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+---
+description: Push local main branch to origin for all 3 workspace repos
+---
+
+# Push Repos
+
+Pushes local `main` to `origin/main` for all workspace repositories.
+
+// turbo
+
+```bash
+for repo in learning_ai_common_plat learning_voice_ai_agent learning_multimodal_memory_agents; do
+  echo "━━━ $repo ━━━"
+  (cd ~/code/mygh/$repo && git push origin main)
+done
+```
+
+## What it does:
+
+1. Iterates over all 3 workspace repos
+2. Runs `git push origin main` in each
+3. Fails fast if a repo has diverged from remote (resolve with rebase manually)
+
+## Repositories:
+
+- learning_ai_common_plat
+- learning_voice_ai_agent
+- learning_multimodal_memory_agents
+
+## When to use:
+
+- After committing a batch of changes locally
+- After running `/repo_commit-workspace`
+- To sync local work to GitHub before switching machines
+
+## Notes:
+
+- Only pushes `main` — does not push other branches
+- Will fail safely if remote has diverged — run `/repo_sync-repos` first then rebase
+- Use `/repo_sync-repos` to pull before pushing if you've been working on another machine