Refine strategist prompts for conversational tone, adaptive sizes, and correct chronological chaining

Optimize prompts for recursive roadmap generation and add goal templates

fix: enforce strict node type rules (sketch/habit/condition) in prompts

chore: support parallel and sequential subgoal structures in system prompts

chore: update system prompts with refined subgoal/sequential rules

fix: enforce parent node creation and subgoal relationships for subtasks

feat: integrate FreeDeepseekAPI background proxy and routing in AIService

feat: add chat history support to AI strategist assist

feat(AI): map subgoal to subgoals-source-right and instruct model to chain sequential subtasks

feat(AI): add retry loop with exponential backoff for transient HTTP status codes (503, 429, 500)

feat(AI): refine prompts for natural conversational agent behavior, strict habit guidelines, and subtask breakdown

fix(AIService): robust model name validation to fallback to gemini-2.5-flash if configured model looks like API key

debug: include model name in Gemini API exception

fix(AIService): strip models/ prefix from Gemini model name

fix

gemini integration

fix: optimized Dockerfile, backend AI service, and gitignore

init