feat: add reminders page, BMad skills upgrade, MCP server refactor

- Add reminders page with navigation support
- Upgrade BMad builder module to skills-based architecture
- Refactor MCP server: extract tools and auth into separate modules
- Add connections cache, custom AI provider support
- Update prisma schema and generated client
- Various UI/UX improvements and i18n updates
- Add service worker for PWA support

Made-with: Cursor

.github/skills/bmad-agent-builder/assets/SKILL-template.md

@@ -0,0 +1,61 @@
+---
+name: bmad-{module-code-or-empty}agent-{agent-name}
+description: {skill-description} # [4-6 word summary]. [trigger phrases]
+---
+
+# {displayName}
+
+## Overview
+
+{overview — concise: who this agent is, what it does, args/modes supported, and the outcome. This is the main help output for the skill — any user-facing help info goes here, not in a separate CLI Usage section.}
+
+## Identity
+
+{Who is this agent? One clear sentence.}
+
+## Communication Style
+
+{How does this agent communicate? Be specific with examples.}
+
+## Principles
+
+- {Guiding principle 1}
+- {Guiding principle 2}
+- {Guiding principle 3}
+
+## On Activation
+
+{if-module}
+Load available config from `{project-root}/_bmad/config.yaml` and `{project-root}/_bmad/config.user.yaml` (root level and `{module-code}` section). If config is missing, let the user know `{module-setup-skill}` can configure the module at any time. Resolve and apply throughout the session (defaults in parens):
+- `{user_name}` ({default}) — address the user by name
+- `{communication_language}` ({default}) — use for all communications
+- `{document_output_language}` ({default}) — use for generated document content
+- plus any module-specific output paths with their defaults
+{/if-module}
+{if-standalone}
+Load available config from `{project-root}/_bmad/config.yaml` and `{project-root}/_bmad/config.user.yaml` if present. Resolve and apply throughout the session (defaults in parens):
+- `{user_name}` ({default}) — address the user by name
+- `{communication_language}` ({default}) — use for all communications
+- `{document_output_language}` ({default}) — use for generated document content
+{/if-standalone}
+
+{if-sidecar}
+Load sidecar memory from `{project-root}/_bmad/memory/{skillName}-sidecar/index.md` — this is the single entry point to the memory system and tells the agent what else to load. Load `./references/memory-system.md` for memory discipline. If sidecar doesn't exist, load `./references/init.md` for first-run onboarding.
+{/if-sidecar}
+
+{if-headless}
+If `--headless` or `-H` is passed, load `./references/autonomous-wake.md` and complete the task without interaction.
+{/if-headless}
+
+{if-interactive}
+Greet the user. If memory provides natural context (active program, recent session, pending items), continue from there. Otherwise, offer to show available capabilities.
+{/if-interactive}
+
+## Capabilities
+
+{Succinct routing table — each capability routes to a progressive disclosure file in ./references/:}
+
+| Capability | Route |
+|------------|-------|
+| {Capability Name} | Load `./references/{capability}.md` |
+| Save Memory | Load `./references/save-memory.md` |