Refactor workspace structure and documentation

- Deleted obsolete files: obsidian-vault.md, onboarding.md, workspace-model.md
- Updated opencode.json to remove references to deleted files.
- Revised profile.md to clarify the status of legacy paths and communication evidence.
- Adjusted prompts to reflect new file paths and improve clarity.
- Enhanced daily logs with focus, work-items, and blockers properties.
- Updated work-item notes to include systems, workstreams, people, and related properties.
- Improved context maintenance guidelines to ensure accurate and durable project knowledge.
- Refined base filters to exclude template files and ensure only relevant notes are displayed.
- Updated daily templates to ensure proper formatting and consistency.
- Modified workflows to align with the new vault structure and improve context synchronization.

vault/03-context/process/workspace-model.md

@@ -50,7 +50,7 @@ When the user corrects a recurring behavior, the workspace should update the fil
 - `vault/.obsidian/` only for portable vault configuration, not project memory
 - `.opencode/commands/` for slash commands
 - `prompts/` for reusable drafting templates
-- `.opencode/agents/` and `ai/AGENTS.md` for default agent behavior
+- `.opencode/agents/` and `AGENTS.md` for default agent behavior
 - `.opencode/skills/` for specialized workflows
 - `vault/00-start/` and `vault/03-context/process/` for durable process rules